subject:(electrochemistry)

University of Gothenburg / Göteborgs Universitet

1. Soares de Oliveira Gomes, Adriano. Selectivity in the chlorate process: Hydrogen evolution and hypochlorite reduction on deposited chromium oxide/hydroxide.

Degree: 2018, University of Gothenburg / Göteborgs Universitet

URL: http://hdl.handle.net/2077/55067

► Abstract Production of chlorate is dependent of using sodium dichromate as a component in the electrolyte. Dichromate provides selectivity by forming a Cr(III) oxide-like film… (more)

▼ Abstract Production of chlorate is dependent of using sodium dichromate as a component in the electrolyte. Dichromate provides selectivity by forming a Cr(III) oxide-like film on the cathodes. Without dichromate, unwanted cathodic reactions dominate instead of the hydrogen evolution reaction (HER), and chlorate is not produced. However, Cr(VI) is a hazardous element and must be replaced in the process with a less harmful compound for environmental and safety reasons. Removing Cr(VI) from the chlorate process has proven to be challenging, and no replacement element or material has been found. This thesis presents experimental and theoretical results leading to a mechanism that explains the selectivity between the unwanted reactions and the HER. The mechanism also supports previous findings regarding the Cr(III) film formed in situ on chlorate cathodes. The approach in this work was to ex situ electrodeposit two structures, Cr(OH)3 and Cr2O3, as pure films. These ex situ-formed films could then be characterized prior to investigating their electrochemical performance relevant to the chlorate process. The morphology of the films were analysed by scanning electron microscopy, revealing clear differences. The Cr(OH)3 film was thin and rough, while the Cr2O3 film was composed of plate-shaped crystallites with approximately 1 µm in length. The molecular structure was investigated by Raman spectroscopy. This was, to some extent, challenging by the discovery that Cr(OH)3 converts to Cr2O3 at high laser energies. Still, the spectra collected with lower laser power clearly showed Raman signatures related to Cr(OH)3. Electrochemical investigations showed that hypochlorite reduction was blocked on both surfaces, Cr(OH)3 and Cr2O3, indicating that the blocking effect is related to Cr(III) and not to the films’ molecular structure or morphology. This reaction was also completely hindered by the Cr(OH)3 deposited on more active electrodes towards hypochlorite reduction, as Fe or Au. In contrast, the HER could still proceed on both Cr(III) films. Interestingly, on Cr2O3 the electrode activity was enhanced towards the HER, while Cr(OH)3 displayed the opposite effect. These results show that the HER take place on the Cr-film, which must be taken in to account in the selective mechanism. The blocking mechanism was first rationalized in the context of surface charge of Cr(III) oxide-like films and their p-type semiconducting properties. These properties may somewhat hinder the reduction of hypochlorite, but cannot give the full explanation for the selectivity. Further insights about the mechanism were given using DFT calculations and the complete selectivity mechanism was determined. Cr-sites cannot be reformed during hypochlorite reduction, and are irreversibly blocked by OH. Thus, the reduction of hypochlorite is blocked by OH groups strongly binding to the surface. The HER, however, can readily proceed at the OH covered surfaces. Key words: sodium chlorate, hydrogen, sodium dichromate, hypochlorite, HER, mild steel electrodes,…

Subjects/Keywords: Electrochemistry

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APA (6^th Edition):

Soares de Oliveira Gomes, A. (2018). Selectivity in the chlorate process: Hydrogen evolution and hypochlorite reduction on deposited chromium oxide/hydroxide. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/55067

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Soares de Oliveira Gomes, Adriano. “Selectivity in the chlorate process: Hydrogen evolution and hypochlorite reduction on deposited chromium oxide/hydroxide.” 2018. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed February 27, 2021. http://hdl.handle.net/2077/55067.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Soares de Oliveira Gomes, Adriano. “Selectivity in the chlorate process: Hydrogen evolution and hypochlorite reduction on deposited chromium oxide/hydroxide.” 2018. Web. 27 Feb 2021.

Vancouver:

Soares de Oliveira Gomes A. Selectivity in the chlorate process: Hydrogen evolution and hypochlorite reduction on deposited chromium oxide/hydroxide. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2018. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2077/55067.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Soares de Oliveira Gomes A. Selectivity in the chlorate process: Hydrogen evolution and hypochlorite reduction on deposited chromium oxide/hydroxide. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2018. Available from: http://hdl.handle.net/2077/55067

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Oxford

2. Li, Danlei. Study of electrode kinetics.

Degree: PhD, 2020, University of Oxford

URL: http://ora.ox.ac.uk/objects/uuid:89dae13d-57b9-4cea-bd43-1ec734731bd3 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.820778

► This thesis reports the use of Tafel analysis in the study of electrode kinetics from both theoretical and experimental perspectives. During electrochemical measurements, any changes… (more)

▼ This thesis reports the use of Tafel analysis in the study of electrode kinetics from both theoretical and experimental perspectives. During electrochemical measurements, any changes in temperature cause changes in diffusion coefficient of the species, the electrochemical rate constant and the equilibrium potential. Concequently, the improtance of temperature control in electrochemical systems is first investigated. When and how thermally induced convective flows in bulk solution influence the votlammetric behaviour are presented in Chapter 3. Chapters 4 and 5 theoretically discuss what fraction of a voltammetric wave is appropriate to use as the Tafel region for accurate analysis under linear, quasi-steady-state and steady-state mass-transport regimes for an irreversible one-electron transfer process. The measured transfer coefficient is found to deviate significantly from its true value as a function of potential due to the mass-transport limitation at high overpotentials. If and how a simple analytical mass-transport correction using a plot of ln |¹<sub style='position: relative; left: -.5em;'>I</sub>-¹<sub style='position: relative; left: -.5em;'>I_lim</sub>| against potential can be used to improve the measurement of transfer coefficient is investigated. The methodology of measuring transfer coefficient is further employed in the electrochemical characterisation of a single microband electrode with unknown dimensions (Chapter 6). Such Tafel analysis is applied to an experimental study where the intrinsic surface quinones on carbon substrates can catalyse Fe^2+/3+ redox reaction evidenced by a potential dependent transfer coefficient (Chapter 7). Last but not least, a new simulation techinique is developed in Chapter 8 to extract the kinetic information from experimental voltammograms for electrodes under both radial and liner regimes on the basis of the prior knowledge of the physical parameters defining the system, most importantly the diffusion coefficient, analyte concentration and electrode radius.

Subjects/Keywords: Electroanalytical chemistry; Fundamental electrochemistry; Electrochemistry

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APA (6^th Edition):

Li, D. (2020). Study of electrode kinetics. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:89dae13d-57b9-4cea-bd43-1ec734731bd3 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.820778

Chicago Manual of Style (16^th Edition):

Li, Danlei. “Study of electrode kinetics.” 2020. Doctoral Dissertation, University of Oxford. Accessed February 27, 2021. http://ora.ox.ac.uk/objects/uuid:89dae13d-57b9-4cea-bd43-1ec734731bd3 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.820778.

MLA Handbook (7^th Edition):

Li, Danlei. “Study of electrode kinetics.” 2020. Web. 27 Feb 2021.

Vancouver:

Li D. Study of electrode kinetics. [Internet] [Doctoral dissertation]. University of Oxford; 2020. [cited 2021 Feb 27]. Available from: http://ora.ox.ac.uk/objects/uuid:89dae13d-57b9-4cea-bd43-1ec734731bd3 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.820778.

Council of Science Editors:

Li D. Study of electrode kinetics. [Doctoral Dissertation]. University of Oxford; 2020. Available from: http://ora.ox.ac.uk/objects/uuid:89dae13d-57b9-4cea-bd43-1ec734731bd3 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.820778

Tokyo Institute of Technology / 東京工業大学

3. IRYANE, ISMAIL. Electrochemistry of dopamine : ドーパミンの電気化学的研究; Electrochemistry of dopamine.

Degree: 博士（工学）, 2016, Tokyo Institute of Technology / 東京工業大学

URL: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100712306

► Dopamine (DA) is a typical neurotransmitter which is very important in the understanding of brain functions. Hence, a great deal of attention has been devoted… (more)

Subjects/Keywords: Dopamine; Electrochemistry

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APA (6^th Edition):

IRYANE, I. (2016). Electrochemistry of dopamine : ドーパミンの電気化学的研究; Electrochemistry of dopamine. (Thesis). Tokyo Institute of Technology / 東京工業大学. Retrieved from http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100712306

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

IRYANE, ISMAIL. “Electrochemistry of dopamine : ドーパミンの電気化学的研究; Electrochemistry of dopamine.” 2016. Thesis, Tokyo Institute of Technology / 東京工業大学. Accessed February 27, 2021. http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100712306.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

IRYANE, ISMAIL. “Electrochemistry of dopamine : ドーパミンの電気化学的研究; Electrochemistry of dopamine.” 2016. Web. 27 Feb 2021.

Vancouver:

IRYANE I. Electrochemistry of dopamine : ドーパミンの電気化学的研究; Electrochemistry of dopamine. [Internet] [Thesis]. Tokyo Institute of Technology / 東京工業大学; 2016. [cited 2021 Feb 27]. Available from: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100712306.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

IRYANE I. Electrochemistry of dopamine : ドーパミンの電気化学的研究; Electrochemistry of dopamine. [Thesis]. Tokyo Institute of Technology / 東京工業大学; 2016. Available from: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100712306

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University

4. Ramachandran, Kartik. Synthesis and characterization of novel materials for electrochemical devices.

Degree: MS, Chemistry, 1996, Oregon State University

URL: http://hdl.handle.net/1957/34522

Subjects/Keywords: Electrochemistry

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APA (6^th Edition):

Ramachandran, K. (1996). Synthesis and characterization of novel materials for electrochemical devices. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/34522

Chicago Manual of Style (16^th Edition):

Ramachandran, Kartik. “Synthesis and characterization of novel materials for electrochemical devices.” 1996. Masters Thesis, Oregon State University. Accessed February 27, 2021. http://hdl.handle.net/1957/34522.

MLA Handbook (7^th Edition):

Ramachandran, Kartik. “Synthesis and characterization of novel materials for electrochemical devices.” 1996. Web. 27 Feb 2021.

Vancouver:

Ramachandran K. Synthesis and characterization of novel materials for electrochemical devices. [Internet] [Masters thesis]. Oregon State University; 1996. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1957/34522.

Council of Science Editors:

Ramachandran K. Synthesis and characterization of novel materials for electrochemical devices. [Masters Thesis]. Oregon State University; 1996. Available from: http://hdl.handle.net/1957/34522

University of Houston

5. Cui, Yan 1990-. Electrochemistry, Acid-base Properties and Spectroelectrochemistry of Porphyrins, Corroles, and Related Molecules.

Degree: PhD, Chemistry, 2015, University of Houston

URL: http://hdl.handle.net/10657/1974

► This dissertation presents the electrochemistry, spectroelectrochemistry and acid-base properties of porphyrins, corroles and related molecules in non-aqueous media. The acid-base properties monitored by electrochemical methods… (more)

Subjects/Keywords: Electrochemistry; Spectroelectrochemistry

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APA (6^th Edition):

Cui, Y. 1. (2015). Electrochemistry, Acid-base Properties and Spectroelectrochemistry of Porphyrins, Corroles, and Related Molecules. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/1974

Chicago Manual of Style (16^th Edition):

Cui, Yan 1990-. “Electrochemistry, Acid-base Properties and Spectroelectrochemistry of Porphyrins, Corroles, and Related Molecules.” 2015. Doctoral Dissertation, University of Houston. Accessed February 27, 2021. http://hdl.handle.net/10657/1974.

MLA Handbook (7^th Edition):

Cui, Yan 1990-. “Electrochemistry, Acid-base Properties and Spectroelectrochemistry of Porphyrins, Corroles, and Related Molecules.” 2015. Web. 27 Feb 2021.

Vancouver:

Cui Y1. Electrochemistry, Acid-base Properties and Spectroelectrochemistry of Porphyrins, Corroles, and Related Molecules. [Internet] [Doctoral dissertation]. University of Houston; 2015. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10657/1974.

Council of Science Editors:

Cui Y1. Electrochemistry, Acid-base Properties and Spectroelectrochemistry of Porphyrins, Corroles, and Related Molecules. [Doctoral Dissertation]. University of Houston; 2015. Available from: http://hdl.handle.net/10657/1974

Michigan State University

6. Beyerlein, Floyd Hilbert, 1942-. Theory and application of chronopotentiometry for measuring heterogeneous electron transfer kinetics.

Degree: PhD, Department of Chemistry, 1970, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:34441

Subjects/Keywords: Electrochemistry

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APA (6^th Edition):

Beyerlein, Floyd Hilbert, 1. (1970). Theory and application of chronopotentiometry for measuring heterogeneous electron transfer kinetics. (Doctoral Dissertation). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:34441

Chicago Manual of Style (16^th Edition):

Beyerlein, Floyd Hilbert, 1942-. “Theory and application of chronopotentiometry for measuring heterogeneous electron transfer kinetics.” 1970. Doctoral Dissertation, Michigan State University. Accessed February 27, 2021. http://etd.lib.msu.edu/islandora/object/etd:34441.

MLA Handbook (7^th Edition):

Beyerlein, Floyd Hilbert, 1942-. “Theory and application of chronopotentiometry for measuring heterogeneous electron transfer kinetics.” 1970. Web. 27 Feb 2021.

Vancouver:

Beyerlein, Floyd Hilbert 1. Theory and application of chronopotentiometry for measuring heterogeneous electron transfer kinetics. [Internet] [Doctoral dissertation]. Michigan State University; 1970. [cited 2021 Feb 27]. Available from: http://etd.lib.msu.edu/islandora/object/etd:34441.

Council of Science Editors:

Beyerlein, Floyd Hilbert 1. Theory and application of chronopotentiometry for measuring heterogeneous electron transfer kinetics. [Doctoral Dissertation]. Michigan State University; 1970. Available from: http://etd.lib.msu.edu/islandora/object/etd:34441

Michigan State University

7. Saltonstall, Richard Bell. The temperature coefficient of the cericcerous electrode.

Degree: PhD, 1935, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:4916

Subjects/Keywords: Electrochemistry

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APA (6^th Edition):

Saltonstall, R. B. (1935). The temperature coefficient of the cericcerous electrode. (Doctoral Dissertation). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:4916

Chicago Manual of Style (16^th Edition):

Saltonstall, Richard Bell. “The temperature coefficient of the cericcerous electrode.” 1935. Doctoral Dissertation, Michigan State University. Accessed February 27, 2021. http://etd.lib.msu.edu/islandora/object/etd:4916.

MLA Handbook (7^th Edition):

Saltonstall, Richard Bell. “The temperature coefficient of the cericcerous electrode.” 1935. Web. 27 Feb 2021.

Vancouver:

Saltonstall RB. The temperature coefficient of the cericcerous electrode. [Internet] [Doctoral dissertation]. Michigan State University; 1935. [cited 2021 Feb 27]. Available from: http://etd.lib.msu.edu/islandora/object/etd:4916.

Council of Science Editors:

Saltonstall RB. The temperature coefficient of the cericcerous electrode. [Doctoral Dissertation]. Michigan State University; 1935. Available from: http://etd.lib.msu.edu/islandora/object/etd:4916

University of Iowa

8. Lee, Garett Gordon Walter. Magnetoelectrocatalysis: enhanced heterogeneous electron transfer reactions at modified electrodes, Grätzel cells, and manganese dioxide electrodes.

Degree: PhD, Chemistry, 2012, University of Iowa

URL: https://ir.uiowa.edu/etd/2563

► Magnetoelectrocatalysis is a physical, catalytic process. When magnetic microparticles are incorporated at an electrode surface, increases in current and system efficiency are observed. These… (more)

▼ Magnetoelectrocatalysis is a physical, catalytic process. When magnetic microparticles are incorporated at an electrode surface, increases in current and system efficiency are observed. These enhancements have been observed in both homogeneous and heterogeneous systems. Here, the effects of magnetic fields on three separate, yet related, systems are analyzed: fundamental heterogeneous rate constants at modified electrodes, dye sensitized solar cells (DSSC), and manganese dioxide electrodes for supercapacitor applications. Previous studies of magnetic field effects on homogeneous systems utilized the cation exchange polymer Nafion and transition metal redox probes, such as tris(bipyridine)ruthenium(II) chloride. At electrodes modified with Nafion films, redox probes experience current enhancement in the presence of a magnetic field. This effect is attributed to increased self exchange, known as Dahms Ruff conduction or hopping between redox species. Here, the impacts of magnetic fields on heterogeneous electron transfer, the electron transfer between the redox probe and solid-state electrode, are demonstrated. A derivative of Nafion, TMODA Nafion is used to study the effect. For transition metal complex redox probes, peak splitting in cyclic voltammagrams are lower for magnetically modified electrodes as compared to analogous nonmagnetic films. The effects of magnetic modification of DSSCs are analyzed. DSSCs are photoelectrochemical cells (PECs) that convert incident light (photons) to electrical power (electrons). DSSCs, or Grätzel cells, are heterogeneous, excitonic devices which undergo multiple electron transfer reactions to complete this process. For studies here, magnetic modification of the electrodes occurs in the semiconductor layer. Enhancements in current density, fill factor, and power output are observed in variety of systems, both n-type and p-type, on glass and PET substrates, utilizing different magnetic microparticles. Lastly, the effects of magnetic fields on the electrochemistry of electrolytic manganese dioxide (EMD) electrodes are examined. Manganese dioxide is an abundant, naturally occurring oxide of manganese that is used ubiquitously in alkaline batteries. manganese dioxide; is a complex material, existing, as many transition metal oxides do, in several polymorphs, each with unique properties. For the studies here, the use of manganese dioxide as a capacitor material in mild aqueous systems is considered. In comparison to traditional electrochemical capacitors, manganese dioxide undergoes both non-faradaic and faradaic charge storage. Magnetic field effects look to exploit this faradaic, … Advisors/Committee Members: Leddy, Johna (supervisor).

Subjects/Keywords: Electrochemistry; Chemistry

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APA (6^th Edition):

Lee, G. G. W. (2012). Magnetoelectrocatalysis: enhanced heterogeneous electron transfer reactions at modified electrodes, Grätzel cells, and manganese dioxide electrodes. (Doctoral Dissertation). University of Iowa. Retrieved from https://ir.uiowa.edu/etd/2563

Chicago Manual of Style (16^th Edition):

Lee, Garett Gordon Walter. “Magnetoelectrocatalysis: enhanced heterogeneous electron transfer reactions at modified electrodes, Grätzel cells, and manganese dioxide electrodes.” 2012. Doctoral Dissertation, University of Iowa. Accessed February 27, 2021. https://ir.uiowa.edu/etd/2563.

MLA Handbook (7^th Edition):

Lee, Garett Gordon Walter. “Magnetoelectrocatalysis: enhanced heterogeneous electron transfer reactions at modified electrodes, Grätzel cells, and manganese dioxide electrodes.” 2012. Web. 27 Feb 2021.

Vancouver:

Lee GGW. Magnetoelectrocatalysis: enhanced heterogeneous electron transfer reactions at modified electrodes, Grätzel cells, and manganese dioxide electrodes. [Internet] [Doctoral dissertation]. University of Iowa; 2012. [cited 2021 Feb 27]. Available from: https://ir.uiowa.edu/etd/2563.

Council of Science Editors:

Lee GGW. Magnetoelectrocatalysis: enhanced heterogeneous electron transfer reactions at modified electrodes, Grätzel cells, and manganese dioxide electrodes. [Doctoral Dissertation]. University of Iowa; 2012. Available from: https://ir.uiowa.edu/etd/2563

University of Limerick

9. Quill, Nathan. Formation of nanoporous InP in KOH and KCl: electrochemistry and electron microscopy.

Degree: 2012, University of Limerick

URL: http://hdl.handle.net/10344/5062

►

peer-reviewed

This thesis focuses on electrochemical pore formation in n-InP in KOH. A model for pore growth along the <111>A crystallographic directions was previously developed… (more)

Subjects/Keywords: electrochemistry; KOH

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APA (6^th Edition):

Quill, N. (2012). Formation of nanoporous InP in KOH and KCl: electrochemistry and electron microscopy. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/5062

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Quill, Nathan. “Formation of nanoporous InP in KOH and KCl: electrochemistry and electron microscopy.” 2012. Thesis, University of Limerick. Accessed February 27, 2021. http://hdl.handle.net/10344/5062.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Quill, Nathan. “Formation of nanoporous InP in KOH and KCl: electrochemistry and electron microscopy.” 2012. Web. 27 Feb 2021.

Vancouver:

Quill N. Formation of nanoporous InP in KOH and KCl: electrochemistry and electron microscopy. [Internet] [Thesis]. University of Limerick; 2012. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10344/5062.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Quill N. Formation of nanoporous InP in KOH and KCl: electrochemistry and electron microscopy. [Thesis]. University of Limerick; 2012. Available from: http://hdl.handle.net/10344/5062

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

10. King, William Martin. The preparation of electrolytic deposits of nickel for the study of physical properties of the metal.

Degree: MS, 1949, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:8845

Subjects/Keywords: Electrochemistry

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APA (6^th Edition):

King, W. M. (1949). The preparation of electrolytic deposits of nickel for the study of physical properties of the metal. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:8845

Chicago Manual of Style (16^th Edition):

King, William Martin. “The preparation of electrolytic deposits of nickel for the study of physical properties of the metal.” 1949. Masters Thesis, Michigan State University. Accessed February 27, 2021. http://etd.lib.msu.edu/islandora/object/etd:8845.

MLA Handbook (7^th Edition):

King, William Martin. “The preparation of electrolytic deposits of nickel for the study of physical properties of the metal.” 1949. Web. 27 Feb 2021.

Vancouver:

King WM. The preparation of electrolytic deposits of nickel for the study of physical properties of the metal. [Internet] [Masters thesis]. Michigan State University; 1949. [cited 2021 Feb 27]. Available from: http://etd.lib.msu.edu/islandora/object/etd:8845.

Council of Science Editors:

King WM. The preparation of electrolytic deposits of nickel for the study of physical properties of the metal. [Masters Thesis]. Michigan State University; 1949. Available from: http://etd.lib.msu.edu/islandora/object/etd:8845

Texas State University – San Marcos

11. Frazer, Jacob Benjamin. Impact of Processing Parameters on Conductive Polymer Electroactivity.

Degree: MS, Chemistry, 2018, Texas State University – San Marcos

URL: https://digital.library.txstate.edu/handle/10877/7458

► Soft-templating techniques have been applied to organic soluble polymer systems that produce a large variety of film morphologies. Film morphology is observed to greatly influence… (more)

Subjects/Keywords: Conductive polymers; Electrochemistry; Conducting polymers; Electrochemistry

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APA (6^th Edition):

Frazer, J. B. (2018). Impact of Processing Parameters on Conductive Polymer Electroactivity. (Masters Thesis). Texas State University – San Marcos. Retrieved from https://digital.library.txstate.edu/handle/10877/7458

Chicago Manual of Style (16^th Edition):

Frazer, Jacob Benjamin. “Impact of Processing Parameters on Conductive Polymer Electroactivity.” 2018. Masters Thesis, Texas State University – San Marcos. Accessed February 27, 2021. https://digital.library.txstate.edu/handle/10877/7458.

MLA Handbook (7^th Edition):

Frazer, Jacob Benjamin. “Impact of Processing Parameters on Conductive Polymer Electroactivity.” 2018. Web. 27 Feb 2021.

Vancouver:

Frazer JB. Impact of Processing Parameters on Conductive Polymer Electroactivity. [Internet] [Masters thesis]. Texas State University – San Marcos; 2018. [cited 2021 Feb 27]. Available from: https://digital.library.txstate.edu/handle/10877/7458.

Council of Science Editors:

Frazer JB. Impact of Processing Parameters on Conductive Polymer Electroactivity. [Masters Thesis]. Texas State University – San Marcos; 2018. Available from: https://digital.library.txstate.edu/handle/10877/7458

University of Manchester

12. Setterfield-Price, Briony Megan. Electrochemical Reduction of Carbon Dioxide.

Degree: 2013, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:207603

► The work undertaken involved the exploration of CO2 electroreduction systems, focussing heavily upon electrocatalysis utilising an array of electrochemical, spectroelectrochemical and spectroscopic techniques.The identification and… (more)

▼ The work undertaken involved the exploration of CO2 electroreduction systems, focussing heavily upon electrocatalysis utilising an array of electrochemical, spectroelectrochemical and spectroscopic techniques.The identification and characterisation of a relatively inexpensive and simple electrocatalyst for CO2 reduction was achieved, with the optimisation and development undertaken in such a manner that not just the electrocatalytic species, but also the entire electrochemical system was investigated, in order to determine and better understand the roles played by the various components.The complex of interest, Mo(CO)4bpy, represents the first molybdenum based molecular electrocatalyst reported to be active toward CO2 reduction, despite the prominence of Mo in enzymes with analogous function. The electrochemical characterisation of the complex in the both the presence and absence of CO2 was undertaken, yielding valuable information on the redox behaviour of the complex within the non-aqueous system in which it was employed and highlighting previously unreported features such as a third reduction and new reoxidation attributed to the reoxidation of a tricarbonyl anionic species. Non-aqueous solvents were chosen as they provide greater CO2 solubility than water with portions of the investigation undertaken in tetrahydrofuran, THF, then moving to the less widely used N-methylpyrrolidone, NMP. NMP is significantly less volatile than THF and has a large negative electrochemical window so is ideal for looking at reduction processes and, importantly, is also used as a commercial CO2 scrubbing solvent.Upon addition of CO2 to the Mo(CO)4bpy system there was an observable lowering of the overpotential by over 300 mV, and significant increase in CO2 associated current when compared to that for ‘direct’ CO2 reduction within the same system, at the reduction potential associated with the first reduction of the tetracarbonyl bipyridyl species. The confirmation of the anionic radical as the active species was attained through DFT calculation and EPR spectroelectrochemistry. Under inert gas the spectrum rapidly generated upon application of the first reduction potential is consistent with the expected response for the radical anionic [Mo(CO)4bpy] •−. When the system is saturated with CO2 this radical is no longer detectable. This supports the idea that the unpaired electron is transferred from the [Mo(CO)4bpy]•− to the CO2 molecule and also suggests that this transfer is rapid as no adduct is detectable via EPR even at reduced temperature (240 K). This is in keeping with the rate constants calculated from the voltammetric measurements made. The stability and activity toward CO2 reduction exhibited by Mo(CO)4bpy displayed a strong dependence on working electrode material, with gold proving optimal, indicative of adsorption being significant in the process.Optimisation of both the catalyst structure and the solvent and electrolyte system were also explored, as well as the (somewhat less directly related) comparison of various sources… Advisors/Committee Members: Dryfe, Robert.

Subjects/Keywords: Electrochemistry; Carbon dioxide

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APA (6^th Edition):

Setterfield-Price, B. M. (2013). Electrochemical Reduction of Carbon Dioxide. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:207603

Chicago Manual of Style (16^th Edition):

Setterfield-Price, Briony Megan. “Electrochemical Reduction of Carbon Dioxide.” 2013. Doctoral Dissertation, University of Manchester. Accessed February 27, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:207603.

MLA Handbook (7^th Edition):

Setterfield-Price, Briony Megan. “Electrochemical Reduction of Carbon Dioxide.” 2013. Web. 27 Feb 2021.

Vancouver:

Setterfield-Price BM. Electrochemical Reduction of Carbon Dioxide. [Internet] [Doctoral dissertation]. University of Manchester; 2013. [cited 2021 Feb 27]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:207603.

Council of Science Editors:

Setterfield-Price BM. Electrochemical Reduction of Carbon Dioxide. [Doctoral Dissertation]. University of Manchester; 2013. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:207603

University of Oxford

13. Sulzer, Valentin. Mathematical modelling of lead-acid batteries.

Degree: PhD, 2019, University of Oxford

URL: http://ora.ox.ac.uk/objects/uuid:db582870-4473-411e-8a16-542a8bb0eeca ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.800079

► Electrochemical and equivalent-circuit modelling are the two most popular approaches to battery simulation, but the former is computationally expensive and the latter provides limited physical… (more)

▼ Electrochemical and equivalent-circuit modelling are the two most popular approaches to battery simulation, but the former is computationally expensive and the latter provides limited physical insight. A theoretical middle ground would be useful to support battery management, online diagnostics, and cell design. In this thesis, we present a porous-electrode model of a lead-acid battery, which includes an extension of concentrated-solution theory that accounts for excluded-volume effects, local pressure variation, and a detailed microscopic water balance. Asymptotic analysis of the one-dimensional model in the limit of small discharge rate produces three reduced-order models, which relate the electrical behaviour to microscopic material properties, but simulate discharge at speeds approaching an equivalent circuit. A lumped-parameter model, which neglects spatial property variations, proves accurate for small discharge rates (below 0.1C), while a spatially resolved higher-order solution retains accuracy at higher discharge rates (up to 5C). The reduced-order models provide improved insight into the battery's behaviour. The models are fit to experimental data, showing good agreement. We then consider the three-dimensional model and exploit the limit of small aspect ratio to decompose the through-cell and transverse dimensions. Further asymptotic analyses in the limit of high conductivity and/or small discharge rate give new simplified models that capture transverse non-uniformities at reduced computational cost. In the simplest case, the current collectors act as series resistors. In order to explore the behaviour of a lead-acid battery during recharge, we return to a one-dimensional model and add an oxygen reaction to the model. We find that the oxygen recombination must be diffusion limited in the negative electrode, leading to non-monotonic voltage increase during constant-current recharge. Reduced-order models in the limit of slow recharge provide good approximations to the full charging model.

Subjects/Keywords: Electrochemistry; Applied mathematics

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APA (6^th Edition):

Sulzer, V. (2019). Mathematical modelling of lead-acid batteries. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:db582870-4473-411e-8a16-542a8bb0eeca ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.800079

Chicago Manual of Style (16^th Edition):

Sulzer, Valentin. “Mathematical modelling of lead-acid batteries.” 2019. Doctoral Dissertation, University of Oxford. Accessed February 27, 2021. http://ora.ox.ac.uk/objects/uuid:db582870-4473-411e-8a16-542a8bb0eeca ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.800079.

MLA Handbook (7^th Edition):

Sulzer, Valentin. “Mathematical modelling of lead-acid batteries.” 2019. Web. 27 Feb 2021.

Vancouver:

Sulzer V. Mathematical modelling of lead-acid batteries. [Internet] [Doctoral dissertation]. University of Oxford; 2019. [cited 2021 Feb 27]. Available from: http://ora.ox.ac.uk/objects/uuid:db582870-4473-411e-8a16-542a8bb0eeca ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.800079.

Council of Science Editors:

Sulzer V. Mathematical modelling of lead-acid batteries. [Doctoral Dissertation]. University of Oxford; 2019. Available from: http://ora.ox.ac.uk/objects/uuid:db582870-4473-411e-8a16-542a8bb0eeca ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.800079

Rhodes University

14. Masilela, Nkosiphile. Photophysical and photoelectrochemical properties of water soluble metallophthalocyanines.

Degree: Faculty of Science, Chemistry, 2010, Rhodes University

URL: http://hdl.handle.net/10962/d1004991

► This work presents the synthesis, characterization, photophysicochemical and photoelectrochemical properties of anionic octa-caboxylated (MOCPcs), tetra-sulfonated (MTSPcs) and quaternized cationic (Q(T-2-Py)MPcs) water soluble aluminium, gallium, silicon,… (more)

▼ This work presents the synthesis, characterization, photophysicochemical and photoelectrochemical properties of anionic octa-caboxylated (MOCPcs), tetra-sulfonated (MTSPcs) and quaternized cationic (Q(T-2-Py)MPcs) water soluble aluminium, gallium, silicon, titanium and zinc phthalocynines. The peripherally tetra-substituted cationic (Q(T-2-Py)MPcs) and anionic (MTSPcs) were found to be aggregated in aqueous media, yet the octa-carboxylated (MOCPcs) counterparts were monomeric in solution. Cremophor EL (CEL) was used as a disaggregating agent, all the aggregated complexes disaggregated partially or completely in the presence of CEL. The photophysicochemical properties of aggregated complexes were investigated both in the presence of CEL and in aqueous media of pH 11 alone. Low triplet, singlet oxygen and fluorescence quantum yield were obtained in aqueous media (especially for the aggregated complexes) but a high improvement was achieved upon addition of CEL. The gallium complexes ((OH)GaOCPc and (OH)GaTSPc) showed good photophysicochemical properties with higher triplet and singlet oxygen quantum yields. For photoelectrochemistry the (MPcs) dyes were adsorbed to nanoporous ZnO, electrodeposited in the presence of eosin Y as structure directing agent (SDA) on FTO substrates by refluxing or soaking the films in a solution containing the dye of interest such that a full surface coverage was achieved. Quaternized cationic (Q(T-2-Py)MPc) and tetrasulfonated (MTSPcs) phthalocyanines formed strong aggregates when deposited on the surface of FTO/ZnO substrate leading. High external (IPCE) and internal (APCE) quantum efficiencies of up to 50.6% and 96.7% were achieved for the OTiOCPc complex. There was a lower overall cell efficiency for quaternized and tetrasulfonated metallophthalocyanines because of the strong aggregates when they were on the surface of the electrodes. Among the studied materials, OTiOCPc gave the highest overall cell efficiency of phthalocyanine electrodeposited on ZnO of so far  = 0.48%.

Subjects/Keywords: Phthalocyanines; Electrochemistry; Photoelectrochemistry

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APA (6^th Edition):

Masilela, N. (2010). Photophysical and photoelectrochemical properties of water soluble metallophthalocyanines. (Thesis). Rhodes University. Retrieved from http://hdl.handle.net/10962/d1004991

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Masilela, Nkosiphile. “Photophysical and photoelectrochemical properties of water soluble metallophthalocyanines.” 2010. Thesis, Rhodes University. Accessed February 27, 2021. http://hdl.handle.net/10962/d1004991.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Masilela, Nkosiphile. “Photophysical and photoelectrochemical properties of water soluble metallophthalocyanines.” 2010. Web. 27 Feb 2021.

Vancouver:

Masilela N. Photophysical and photoelectrochemical properties of water soluble metallophthalocyanines. [Internet] [Thesis]. Rhodes University; 2010. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10962/d1004991.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Masilela N. Photophysical and photoelectrochemical properties of water soluble metallophthalocyanines. [Thesis]. Rhodes University; 2010. Available from: http://hdl.handle.net/10962/d1004991

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rhodes University

15. Idowu, Mopelola Abidemi. Photophysical and photochemical behaviour of metallophthalocyanines effect of nanoparticles and molecules of biological importance.

Degree: Faculty of Science, Chemistry, 2009, Rhodes University

URL: http://hdl.handle.net/10962/d1004990

► Syntheses, spectral, photophysical and photochemical studies of some neutral, anionic and cationic metallophthalocyanine derivatives are presented. The effects of central metal ions, solvents, aggregation, surfactant,… (more)

▼ Syntheses, spectral, photophysical and photochemical studies of some neutral, anionic and cationic metallophthalocyanine derivatives are presented. The effects of central metal ions, solvents, aggregation, surfactant, nanoparticles and bovine serum albumin on the photophysical and photochemical behaviour are investigated. Mercaptocarboxylic acid stabilized CdTe quantum dots (QDs) were used as energy donors to anionic water-soluble MPcs through Förster resonance energy transfer (FRET). Energy transfer (ET) from the QDs to the MPcs occurred upon photoexcitation of the QDs. An enhancement in efficiency of ET with the nature of the cappings on the QDs was observed with few occurrences of a non-Förster type ET. QDs were found to improve the photophysicochemical behaviour of the MPcs, with the possibility of indirect production of singlet oxygen (Φ[subscript Δ]) via FRET mechanism. Interaction of the QDs with cationic water-souble MPcs produced ion-pair complexes resulting in aggregates due to strong electronic coupling. The stoichiometry of the reaction and association constants are evaluated by the continuous variation method. Improved photophysicochemical behaviour with no spectral alterations was observed in MPcs in the presence of magnetic fluid. Complexes showed high triplet quantum yields with corresponding long lifetimes and high photostability. Elucidation of the results of the interaction of bovine serum albumin (BSA) with MPcs or QDs is presented. Increased efficiency of Φ[subscript Δ] generation of MPcs in the presence of BSA coupled with large binding constants, suggesting strong interaction of the MPcs with BSA was observed. Enhanced emission intensity of QDs when linked to or in a mixture with BSA due to radiationless recombination at the surface vacancies was also observed. The study revealed positive deviation from Stern-Volmer relationship suggesting the occurrence of static and dynamic mechanisms of quenching together. Fluorescence quenching of the MPcs by benzoquinone, analysed by Stern-Volmer relationship is also presented; the results were employed in determining fluorescence lifetimes of the complexes. Photoelectrochemical characteristics of MPc-sensitized electrodeposited ZnO thin films were studied; ZnOCPc / ZnO films have been improved to an incident photon-to-currentconversion (IPCE) value of 31.1 % with an absorbed photon-to-current conversion (APCE) of 59.6 %. The best obtained so far with phthalocyanine-type sensitizers on nanocrystalline ZnO films. Fluorescent-magnetic nanocomposite with excellent photophysical properties which can be exploited for combined photodynamic and hyperthermia therapies is also presented.

Subjects/Keywords: Electrochemistry; Phthalocyanines; Nanoparticles

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APA (6^th Edition):

Idowu, M. A. (2009). Photophysical and photochemical behaviour of metallophthalocyanines effect of nanoparticles and molecules of biological importance. (Thesis). Rhodes University. Retrieved from http://hdl.handle.net/10962/d1004990

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Idowu, Mopelola Abidemi. “Photophysical and photochemical behaviour of metallophthalocyanines effect of nanoparticles and molecules of biological importance.” 2009. Thesis, Rhodes University. Accessed February 27, 2021. http://hdl.handle.net/10962/d1004990.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Idowu, Mopelola Abidemi. “Photophysical and photochemical behaviour of metallophthalocyanines effect of nanoparticles and molecules of biological importance.” 2009. Web. 27 Feb 2021.

Vancouver:

Idowu MA. Photophysical and photochemical behaviour of metallophthalocyanines effect of nanoparticles and molecules of biological importance. [Internet] [Thesis]. Rhodes University; 2009. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10962/d1004990.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Idowu MA. Photophysical and photochemical behaviour of metallophthalocyanines effect of nanoparticles and molecules of biological importance. [Thesis]. Rhodes University; 2009. Available from: http://hdl.handle.net/10962/d1004990

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Berkeley

16. Paw U, Latisha. Energy generation and storage: Non-aqueous electrochemical synthesis of Cu(2-x)S and reverse bias removal of Al2O3.

Degree: Chemistry, 2015, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/0gv3999w

► Two investigations into energy generation and energy storage are presented in this dissertation. First the electrodeposition of copper sulfide, Cu2-xS in non-aqueous solvent is considered… (more)

▼ Two investigations into energy generation and energy storage are presented in this dissertation. First the electrodeposition of copper sulfide, Cu2-xS in non-aqueous solvent is considered for photovoltaic applications. Second the reverse-bias removal of porous aluminum oxide is investigated for lithium rechargeable batteries.To determine the electrochemical conditions for the deposition of copper sulfide the electrochemistry is investigated in dimethyl-sulfoxide, a non-aqueous solvent. Cyclic voltammetry was used to investigate the copper source, copper sulfate, and sulfur source, elemental sulfur. Comparisons to previous aqueous studies and published non-aqueous studies are made. Copper sulfate behaves as expected in DMSO, with copper(I) ions stabilized in solution. The electrochemistry of elemental sulfur is in agreement with published non-aqueous investigations. Studies with both sources offer simplified electrochemical reactions when compared to aqueous solutions. The reduction in possible reactions is promising for deposition of single composition films.Once the electrochemsitry of the copper/sulfur solutions was completed, depositions were performed. Crystalline films of Cu1.8S and Cu1.96 S were deposited with minor impurities. Films were annealed via rapid thermal annealing to increase the crystallinity. Post-annealing films had the composition of Cu1.96S and Cu2S respectively. Electrodepositing crystalline films of copper sulfide with only small amounts of impurities from non-aqueous solutions is a significant success from previous investigations. From energy generation to energy storage, porous aluminum oxide(PAO) is a promising material for rechargeable lithium battery separators. Previous studies showed that reverse-bias removal of aluminum oxide from aluminum generates a flexible membrane. The removal process was not well understood. A mechanism is proposed based on investigations of the removal conditions. Initially there are two simultaneous reactions, hydrogen reduction and the reduction of aluminum oxide to aluminum. The increased stress from the volume contraction as the reduction occurs leads to film delamination. Some areas of the membrane are still pinned to the aluminum backing and are etched away by the acid over time. Flexibility of the films are unchanged by the solution conditions. This supports the previous conclusions that the films are naturally flexible, and impurities in chemical film removal processes lead to brittleness. With flexibility agnostic of the synthetic conditions, they can be chosen based on other factors, such as availability and cost. The viability of porous aluminum oxide for use in the battery industry is dependent on not only the performance, but also on the cost. The rechargeable lithium battery market was explored and a basic cost analysis for the porous aluminum oxide membrane was calculated to determine PAO's viability. Rechargeable lithium batteries are part of a large and growing market that is extremely cost sensitive. Even recent concerns of lithium-ion battery…

Subjects/Keywords: Chemistry; Anodization; Electrochemistry

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APA (6^th Edition):

Paw U, L. (2015). Energy generation and storage: Non-aqueous electrochemical synthesis of Cu(2-x)S and reverse bias removal of Al2O3. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/0gv3999w

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Paw U, Latisha. “Energy generation and storage: Non-aqueous electrochemical synthesis of Cu(2-x)S and reverse bias removal of Al2O3.” 2015. Thesis, University of California – Berkeley. Accessed February 27, 2021. http://www.escholarship.org/uc/item/0gv3999w.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Paw U, Latisha. “Energy generation and storage: Non-aqueous electrochemical synthesis of Cu(2-x)S and reverse bias removal of Al2O3.” 2015. Web. 27 Feb 2021.

Vancouver:

Paw U L. Energy generation and storage: Non-aqueous electrochemical synthesis of Cu(2-x)S and reverse bias removal of Al2O3. [Internet] [Thesis]. University of California – Berkeley; 2015. [cited 2021 Feb 27]. Available from: http://www.escholarship.org/uc/item/0gv3999w.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Paw U L. Energy generation and storage: Non-aqueous electrochemical synthesis of Cu(2-x)S and reverse bias removal of Al2O3. [Thesis]. University of California – Berkeley; 2015. Available from: http://www.escholarship.org/uc/item/0gv3999w

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto

17. Dounin, Vladimir. Innovative Approaches for the Electrochemical Detection of Acetylcholinesterase Inhibitors.

Degree: 2010, University of Toronto

URL: http://hdl.handle.net/1807/25556

►

This document describes research conducted during 2009-2010 in the Kerman Group laboratory at the University of Toronto Scarborough to investigate the application of electrochemical techniques… (more)

Subjects/Keywords: acetylcholinesterase; electrochemistry; 0486

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APA (6^th Edition):

Dounin, V. (2010). Innovative Approaches for the Electrochemical Detection of Acetylcholinesterase Inhibitors. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/25556

Chicago Manual of Style (16^th Edition):

Dounin, Vladimir. “Innovative Approaches for the Electrochemical Detection of Acetylcholinesterase Inhibitors.” 2010. Masters Thesis, University of Toronto. Accessed February 27, 2021. http://hdl.handle.net/1807/25556.

MLA Handbook (7^th Edition):

Dounin, Vladimir. “Innovative Approaches for the Electrochemical Detection of Acetylcholinesterase Inhibitors.” 2010. Web. 27 Feb 2021.

Vancouver:

Dounin V. Innovative Approaches for the Electrochemical Detection of Acetylcholinesterase Inhibitors. [Internet] [Masters thesis]. University of Toronto; 2010. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1807/25556.

Council of Science Editors:

Dounin V. Innovative Approaches for the Electrochemical Detection of Acetylcholinesterase Inhibitors. [Masters Thesis]. University of Toronto; 2010. Available from: http://hdl.handle.net/1807/25556

18. Bergman, Jenny. Development of Electrochemical Biosensors for Neurochemical Applications.

Degree: 2018, University of Gothenburg / Göteborgs Universitet

URL: http://hdl.handle.net/2077/54578

► The brain consists of billions of cells, including nerve cells, which have the ability of transforming an incoming electrical signal in to a chemical output… (more)

Subjects/Keywords: biosensors; electrochemistry; neurochemistry

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APA (6^th Edition):

Bergman, J. (2018). Development of Electrochemical Biosensors for Neurochemical Applications. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/54578

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bergman, Jenny. “Development of Electrochemical Biosensors for Neurochemical Applications.” 2018. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed February 27, 2021. http://hdl.handle.net/2077/54578.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bergman, Jenny. “Development of Electrochemical Biosensors for Neurochemical Applications.” 2018. Web. 27 Feb 2021.

Vancouver:

Bergman J. Development of Electrochemical Biosensors for Neurochemical Applications. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2018. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2077/54578.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bergman J. Development of Electrochemical Biosensors for Neurochemical Applications. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2018. Available from: http://hdl.handle.net/2077/54578

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Florida

19. Alexander, Christopher L. Impedance Spectroscopy The Influence of Surface Heterogeneity and Application to Corrosion Monitoring of Bridge Tendons.

Degree: PhD, Chemical Engineering, 2017, University of Florida

URL: https://ufdc.ufl.edu/UFE0051021

► External post-tensioned tendons are used in bridge construction to link precast concrete segments together. The tendons consist of 7-wire high-strength steel strands contained within a… (more)

Subjects/Keywords: corrosion – electrochemistry – impedance

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APA (6^th Edition):

Alexander, C. L. (2017). Impedance Spectroscopy The Influence of Surface Heterogeneity and Application to Corrosion Monitoring of Bridge Tendons. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0051021

Chicago Manual of Style (16^th Edition):

Alexander, Christopher L. “Impedance Spectroscopy The Influence of Surface Heterogeneity and Application to Corrosion Monitoring of Bridge Tendons.” 2017. Doctoral Dissertation, University of Florida. Accessed February 27, 2021. https://ufdc.ufl.edu/UFE0051021.

MLA Handbook (7^th Edition):

Alexander, Christopher L. “Impedance Spectroscopy The Influence of Surface Heterogeneity and Application to Corrosion Monitoring of Bridge Tendons.” 2017. Web. 27 Feb 2021.

Vancouver:

Alexander CL. Impedance Spectroscopy The Influence of Surface Heterogeneity and Application to Corrosion Monitoring of Bridge Tendons. [Internet] [Doctoral dissertation]. University of Florida; 2017. [cited 2021 Feb 27]. Available from: https://ufdc.ufl.edu/UFE0051021.

Council of Science Editors:

Alexander CL. Impedance Spectroscopy The Influence of Surface Heterogeneity and Application to Corrosion Monitoring of Bridge Tendons. [Doctoral Dissertation]. University of Florida; 2017. Available from: https://ufdc.ufl.edu/UFE0051021

Latrobe University

20. Barbante, Gregory Joseph. Electrochemiluminescence of ruthenium polypyridyl complexes in solution and solid-state.

Degree: PhD, 2011, Latrobe University

URL: http://hdl.handle.net/1959.9/532597

►

Thesis (Ph.D.) - La Trobe University, 2011

Submission note: "A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy… (more)

Subjects/Keywords: Electrochemistry – Research.; Chemiluminescence.

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APA (6^th Edition):

Barbante, G. J. (2011). Electrochemiluminescence of ruthenium polypyridyl complexes in solution and solid-state. (Doctoral Dissertation). Latrobe University. Retrieved from http://hdl.handle.net/1959.9/532597

Chicago Manual of Style (16^th Edition):

Barbante, Gregory Joseph. “Electrochemiluminescence of ruthenium polypyridyl complexes in solution and solid-state.” 2011. Doctoral Dissertation, Latrobe University. Accessed February 27, 2021. http://hdl.handle.net/1959.9/532597.

MLA Handbook (7^th Edition):

Barbante, Gregory Joseph. “Electrochemiluminescence of ruthenium polypyridyl complexes in solution and solid-state.” 2011. Web. 27 Feb 2021.

Vancouver:

Barbante GJ. Electrochemiluminescence of ruthenium polypyridyl complexes in solution and solid-state. [Internet] [Doctoral dissertation]. Latrobe University; 2011. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1959.9/532597.

Council of Science Editors:

Barbante GJ. Electrochemiluminescence of ruthenium polypyridyl complexes in solution and solid-state. [Doctoral Dissertation]. Latrobe University; 2011. Available from: http://hdl.handle.net/1959.9/532597

Queens University

21. Holmberg, Rebecca. Characterization of Electrochemically Formed Coloured Passive Layers on Titanium and Zirconium: Optical, Surface and Corrosion Properties .

Degree: Chemistry, 2011, Queens University

URL: http://hdl.handle.net/1974/6733

► Electrochemically formed passive layers on titanium and zirconium, and their optical, surface and corrosion properties are presented. With the use of higher applied AC voltages,… (more)

▼ Electrochemically formed passive layers on titanium and zirconium, and their optical, surface and corrosion properties are presented. With the use of higher applied AC voltages, the passive layers become thicker and more protective of the underlying metal, as determined from thickness measurements by scanning electron microscopy and focused ion beam instruments, as well as passive layer corrosion resistance measurements by electrochemical polarization curve and inductively coupled plasma mass spectrometry experiments. The surface morphology of all samples was studied with atomic force microscopy, profilometry, visible light microscopy, transmission electron microscopy, and finally electron backscattered diffraction experiments. The passive layers were found to be uniform in their surface structure with no cracks or fractures. However, the samples prepared at VAC = 60-80 V showed defects, which were increasingly prevalent at higher VAC. These defects are thought to be attributed to a process of localized electrochemical breakdown. The aforementioned increase in corrosion resistance is in spite of the defects, which were observed for the samples prepared at VAC = 60-80 V. Surface morphology, in relation to optical properties, was also investigated through reflectance spectroscopy measurements. A correlation between grain colouration and light reflected from the sample surface was observed through measurements using visible light microscopy as well as near infrared ultraviolet visible reflectance spectroscopy. These experiments showed a red-shift of wavelength maxima (λmax) values as voltages, and therefore thickness, were increased. This is the reason that different colours are seen for different thicknesses; the red shift causes different wavelengths to be reflected constructively and destructively. Overall, these passive layers are protective of an already remarkable metal and, with greater knowledge of their properties, their potential may be observed in a wide range of applications.

Subjects/Keywords: Material Science ; Electrochemistry

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APA (6^th Edition):

Holmberg, R. (2011). Characterization of Electrochemically Formed Coloured Passive Layers on Titanium and Zirconium: Optical, Surface and Corrosion Properties . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/6733

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Holmberg, Rebecca. “Characterization of Electrochemically Formed Coloured Passive Layers on Titanium and Zirconium: Optical, Surface and Corrosion Properties .” 2011. Thesis, Queens University. Accessed February 27, 2021. http://hdl.handle.net/1974/6733.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Holmberg, Rebecca. “Characterization of Electrochemically Formed Coloured Passive Layers on Titanium and Zirconium: Optical, Surface and Corrosion Properties .” 2011. Web. 27 Feb 2021.

Vancouver:

Holmberg R. Characterization of Electrochemically Formed Coloured Passive Layers on Titanium and Zirconium: Optical, Surface and Corrosion Properties . [Internet] [Thesis]. Queens University; 2011. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1974/6733.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Holmberg R. Characterization of Electrochemically Formed Coloured Passive Layers on Titanium and Zirconium: Optical, Surface and Corrosion Properties . [Thesis]. Queens University; 2011. Available from: http://hdl.handle.net/1974/6733

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Louisville

22. Carroll, Susan. Application of microfabrication in electrochemical sensing.

Degree: PhD, 2011, University of Louisville

URL: 10.18297/etd/216 ; https://ir.library.louisville.edu/etd/216

► In this work, micro fabrication techniques are explored not only to simplify the production of complex lab on-a-chip devices (LOC), but also micro fabrication will… (more)

▼ In this work, micro fabrication techniques are explored not only to simplify the production of complex lab on-a-chip devices (LOC), but also micro fabrication will be utilized to create intelligent design features that will enhance an electrochemical sensor's capabilities. First, a low temperature adhesive bonding procedure for LOC glass devices was evaluated for capillary electrophoresis (CE) applications. This low temperature method utilizes UV adhesive to bond the glass microchips under the assistance of a mask aligner. The bonding process was carried out at room temperature in < 30 minutes, and provided a near 100% success rate. Microchips exhibited similar electroosmotic flow, separation characteristics, stable long-term performance, excellent chip-to-chip reproducibility, as their thermally bonded counter parts. This bonding approach required new but easily implemented structural features. In addition to cost effective and reliable fabrication techniques, microchips designed for long-term unattended electrochemical sensing have been evaluated. Specific advantages of the micro fabrication approach include the capability to create an intelligent design containing features such as redundant sensing electrodes, on-chip reference and auxiliary electrodes, and in situ electrode regeneration/calibration. One system targeted involves continuous pH monitoring in drinking water at solid-state iridium oxide electrodes. Microchips utilized consist of a flow-through silicon platform containing patterned gold electrodes onto which iridium oxide was deposited electrochemically. To simulate drinking water detection scenarios, sensors were integrated into a flow system. Elven equivalent pH electrodes where evaluated for electrode-to-electrode reproducibility, long-term drift, and response to expected interfering agents. With on-chip voltage treatment, absolute potentials measured for an electrode array are within ± 4 mY, with identical (±1 mY/pH unit) calibration slopes. This performance level is sustainable over weeks. Sensors for exhaustive coulometry were designed, fabricated and evaluated. Microchips contained thin-film gold working and Ag/AgCI pseudo-reference electrodes. A custom flow cell containing a counter electrode chamber was constructed to integrate the sensor and to create an electrolysis chamber with a fixed volume. Different chip designs were evaluated for reproducibility and longevity using Fe(CN)63-/4- as model analytes. The relative standard deviation (RSD) for a chip (over 42 days) was 5.5% whereas the sensor-to-sensor reproducibility was within 6.3%. A more practical application for utilizing exhaustive coulometry by the determination of free chlorine in drinking water is briefly evaluated. Initially studies will outline the challenges involved by analyzing hypochlorite. Advisors/Committee Members: Baldwin, Richard P..

Subjects/Keywords: Electrochemistry; Sensors; Microfabrication

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APA (6^th Edition):

Carroll, S. (2011). Application of microfabrication in electrochemical sensing. (Doctoral Dissertation). University of Louisville. Retrieved from 10.18297/etd/216 ; https://ir.library.louisville.edu/etd/216

Chicago Manual of Style (16^th Edition):

Carroll, Susan. “Application of microfabrication in electrochemical sensing.” 2011. Doctoral Dissertation, University of Louisville. Accessed February 27, 2021. 10.18297/etd/216 ; https://ir.library.louisville.edu/etd/216.

MLA Handbook (7^th Edition):

Carroll, Susan. “Application of microfabrication in electrochemical sensing.” 2011. Web. 27 Feb 2021.

Vancouver:

Carroll S. Application of microfabrication in electrochemical sensing. [Internet] [Doctoral dissertation]. University of Louisville; 2011. [cited 2021 Feb 27]. Available from: 10.18297/etd/216 ; https://ir.library.louisville.edu/etd/216.

Council of Science Editors:

Carroll S. Application of microfabrication in electrochemical sensing. [Doctoral Dissertation]. University of Louisville; 2011. Available from: 10.18297/etd/216 ; https://ir.library.louisville.edu/etd/216

University of New South Wales

23. Tavallaie, Roya. Electrochemical microRNA biosenosrs.

Degree: Chemistry, 2015, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/55159 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36641/SOURCE02?view=true

► To develop point of care devices for cancer by detecting blood-based biomarkers, there are several challenges that the current research aims to overcome including higher… (more)

▼ To develop point of care devices for cancer by detecting blood-based biomarkers, there are several challenges that the current research aims to overcome including higher sensitivity, greater selectivity, and rapid assaying time. To achieve these goals, the results of three research chapters are presented in this PhD dissertation. The first two chapters aim to establish a detection method for microRNA while also seeks to advance fundamental insight into the impact of surface chemistry on the performance of nucleic acids biosensors. In the first chapter, the effect of interfacial design on the mismatch discrimination capability from methylene blue, as a non-covalently bound redox label, at low-density DNA films was studied. A decrease in the ability of the double helix to access the electrode surface was found to result in an improvement in the single mismatch discrimination. Although selective discrimination of the target microRNA from single base pair mismatch was achieved, the detection scheme required multi incubation and rinsing steps, which is not desirable. To address this issue, the applied sensing method in the second chapter involves the use of methylene blue covalently attached to probe nucleic acid, whose distance from the electrode surface is altered as a result of the conformational changes of probe upon hybridization. Using this method, the impact of surface chemistry of nucleic acids duplexes (the choice of probe and target being DNA or RNA) on their electrochemical properties has been investigated. It was found that DNA/RNA has a unique and highly bent conformation, compared to the well-studied DNA/DNA duplex. The optimal conditions for the construction of microRNA detection have been identified using this system. To achieve ultralow concentration detection, the third chapter reports on combining the developed detection method for microRNA in the second chapter, with the concept of using gold coated magnetic particles as dispersible electrodes. This is to address the limited mass transfer rates at the nanoscale. Using this combination, an ultrasensitive and rapid detection of microRNA, with a lowest detected concentration of 1 aM and a response time of 30 min, was achieved. Advisors/Committee Members: Gooding, J. Justin, Chemistry, Faculty of Science, UNSW.

Subjects/Keywords: Electrochemistry; microRNA; Biosensor

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APA (6^th Edition):

Tavallaie, R. (2015). Electrochemical microRNA biosenosrs. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/55159 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36641/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Tavallaie, Roya. “Electrochemical microRNA biosenosrs.” 2015. Doctoral Dissertation, University of New South Wales. Accessed February 27, 2021. http://handle.unsw.edu.au/1959.4/55159 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36641/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Tavallaie, Roya. “Electrochemical microRNA biosenosrs.” 2015. Web. 27 Feb 2021.

Vancouver:

Tavallaie R. Electrochemical microRNA biosenosrs. [Internet] [Doctoral dissertation]. University of New South Wales; 2015. [cited 2021 Feb 27]. Available from: http://handle.unsw.edu.au/1959.4/55159 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36641/SOURCE02?view=true.

Council of Science Editors:

Tavallaie R. Electrochemical microRNA biosenosrs. [Doctoral Dissertation]. University of New South Wales; 2015. Available from: http://handle.unsw.edu.au/1959.4/55159 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36641/SOURCE02?view=true

University of New South Wales

24. Lai, Leo Ming Hei. Nanoparticle biosensors: understanding and detection at low concentrations.

Degree: Chemistry, 2011, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/50440 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9334/SOURCE02?view=true

► Detection of analyte in low concentrations has aroused research into the use of nanostructured electrodes to lower the detection limit and decrease response time. Limitations… (more)

▼ Detection of analyte in low concentrations has aroused research into the use of nanostructured electrodes to lower the detection limit and decrease response time. Limitations of low concentrations sensing are; the relatively few analyte present in solution (low signal) and a long diffusion of the analyte to the sensing surface (long response time). This thesis reports on low concentration detection for different species and the employment of gold nanoparticles or gold-coated magnetic nanoparticles ([email protected]) to achieve this. Gold nanoparticles in solution were used in this work to improve both the detection limit and response time. To demonstrate this, particles were modified with L-cysteine and attached to an electrode surface as well as being dispersed into solution. These particles are used to detect copper in solution, requiring two cysteines to complex each copper ion. Hence the presence of copper ions, causes the particles to aggregate in solution and on the electrode surface. This aggregation collects large amounts of the analyte from solution as well as shortens diffusion time. A detection limit of 1 pM and response time of 10 minutes was observed. However, not all the nanoparticles aggregate in solution, thus limiting the amount of analyte detected. Consequently, [email protected] were used to further improve the detection limit and lower response time. Same as gold nanoparticles, [email protected] can capture and concentrate the analyte, with added advantage that all the particles is collected and in a shorter period of time via a magnetic field. Aggregation of [email protected] modified with electroactive molecule over an electrode indicated that the lowest detected amount of 0.7 electroactive molecules per particle. Non-electroactive molecules, such as enrofloxacin were detected with resistance measurements of the [email protected] films deposited across interdigitated electrodes. Change in resistance is related to distance between particles, which results from the antibodies specific to the analyte being present or absent after exposure to the analyte solution. A detection limit of 150 aM was observed with a detection time of 30 minutes with this [email protected] system. The generality of the nanoparticle system could be applied to detect a wide range of biologically relevant molecules. A change in paradigm from having a sensing surface that is fixed in space to one that can thoroughly mix with the target analyte have solved many of the problems faced by low concentration sensing. Advisors/Committee Members: Gooding, Justin, Chemistry, Faculty of Science, UNSW.

Subjects/Keywords: Electrochemistry; Nanoparticles; Biosensor

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APA (6^th Edition):

Lai, L. M. H. (2011). Nanoparticle biosensors: understanding and detection at low concentrations. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/50440 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9334/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Lai, Leo Ming Hei. “Nanoparticle biosensors: understanding and detection at low concentrations.” 2011. Doctoral Dissertation, University of New South Wales. Accessed February 27, 2021. http://handle.unsw.edu.au/1959.4/50440 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9334/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Lai, Leo Ming Hei. “Nanoparticle biosensors: understanding and detection at low concentrations.” 2011. Web. 27 Feb 2021.

Vancouver:

Lai LMH. Nanoparticle biosensors: understanding and detection at low concentrations. [Internet] [Doctoral dissertation]. University of New South Wales; 2011. [cited 2021 Feb 27]. Available from: http://handle.unsw.edu.au/1959.4/50440 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9334/SOURCE02?view=true.

Council of Science Editors:

Lai LMH. Nanoparticle biosensors: understanding and detection at low concentrations. [Doctoral Dissertation]. University of New South Wales; 2011. Available from: http://handle.unsw.edu.au/1959.4/50440 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9334/SOURCE02?view=true

University of Oklahoma

25. Godman, Nicholas. Electrochemical Characterization of Photocurable and Layer-By-Layer Assembled Ferrocene-Modified Linear Poly(ethylenimine) Bioelectrodes.

Degree: PhD, 2015, University of Oklahoma

URL: http://hdl.handle.net/11244/15464

► New methods of constructing enzymatic bioelectrodes based on ferrocene-modified linear poly(ethylenimine) (LPEI) were explored with the intent of lowering device fabrication times. Redox polymers were… (more)

▼ New methods of constructing enzymatic bioelectrodes based on ferrocene-modified linear poly(ethylenimine) (LPEI) were explored with the intent of lowering device fabrication times. Redox polymers were synthesized and characterized for usage as both anode and cathode materials. Photolithography was used to form patterned films based on ferrocenylpropyl-modified linear poly(ethylenimine-co-allylethylenimine) (Fc-C3-LPAEI). Fc-C3-LPAEI (50% allylated, 5% ferrocene) films were crosslinked in the presence of glucose oxidase (GOX) using both photogenerated radicals and nitrenes. Biosensor efficiency was found to be a function of both polymer connectivity and enzyme stability. Fc-C3-LPAEI/GOX bioanodes were capable of generating 44.9 ± 1.3 µAcm-2 after five hours irradiation using a photogenerated dinitrene from 1,2-bis(2-azidoethoxy)ethane. Both electrostatic and covalent layer-by-layer assembly were used for the fabrication of polymer/enzyme composite thin films. Ferrocenylhexyl- and ferrocenylpropyl- modified LPEI (Fc-C6-LPEI, Fc-C3-LPEI. 17-20% ferrocene) were used with periodate modified glucose oxidase (p-GOX) for the construction of enzymatic bioanodes capable of generating up to 381 ± 3 and 1417 ± 63 µAcm-2, respectively. Fc-C3-LPEI/p-GOX biofuel cells generated 86 ± 3 µWcm-2 at pH 7 when poised against an air-breathing Pt cathode. A chloroferrocene-modifed redox polymer (FcCl-C3-LPEI, 17-20% chloroferrocene) was assembled with laccase to construct biocathodes capable of generating up to 5.75 ± 0.14 µAcm-2 on planar gold electrodes and 32.3 ± 3.2 µAcm-2 on nitric acid oxidized carbon paper. Lastly, sulfur and paracyclophane derivatives were copolymerized via inverse vulcanization to afford materials with the possibility of being incorporated in lithium-sulfur batteries. Differential scanning calorimetry was used to monitor the exothermic polymerization between the reactants, and the reaction parameters were optimized by varying the ratios of the starting materials. Advisors/Committee Members: Glatzhofer, Daniel (advisor), Nicholas, Kenneth (committee member), Yip, Wai Tak (committee member), Thomson, Robert (committee member), Crossley, Steven (committee member).

Subjects/Keywords: Biosensors; Electrochemistry; Polymers

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APA (6^th Edition):

Godman, N. (2015). Electrochemical Characterization of Photocurable and Layer-By-Layer Assembled Ferrocene-Modified Linear Poly(ethylenimine) Bioelectrodes. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/15464

Chicago Manual of Style (16^th Edition):

Godman, Nicholas. “Electrochemical Characterization of Photocurable and Layer-By-Layer Assembled Ferrocene-Modified Linear Poly(ethylenimine) Bioelectrodes.” 2015. Doctoral Dissertation, University of Oklahoma. Accessed February 27, 2021. http://hdl.handle.net/11244/15464.

MLA Handbook (7^th Edition):

Godman, Nicholas. “Electrochemical Characterization of Photocurable and Layer-By-Layer Assembled Ferrocene-Modified Linear Poly(ethylenimine) Bioelectrodes.” 2015. Web. 27 Feb 2021.

Vancouver:

Godman N. Electrochemical Characterization of Photocurable and Layer-By-Layer Assembled Ferrocene-Modified Linear Poly(ethylenimine) Bioelectrodes. [Internet] [Doctoral dissertation]. University of Oklahoma; 2015. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/11244/15464.

Council of Science Editors:

Godman N. Electrochemical Characterization of Photocurable and Layer-By-Layer Assembled Ferrocene-Modified Linear Poly(ethylenimine) Bioelectrodes. [Doctoral Dissertation]. University of Oklahoma; 2015. Available from: http://hdl.handle.net/11244/15464

University of Oxford

26. Yang, Minjun. Analytical electrochemistry : beyond the traditional boundaries.

Degree: PhD, 2020, University of Oxford

URL: http://ora.ox.ac.uk/objects/uuid:dbffa945-725d-47a1-9d83-cb36687f5f23 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816667

► This thesis presents five analytical electrochemistry projects which are written as separate chapters. The research presented herein covers a wide aspect of electrochemistry, ranging, experimentally,… (more)

▼ This thesis presents five analytical electrochemistry projects which are written as separate chapters. The research presented herein covers a wide aspect of electrochemistry, ranging, experimentally, from a 'forensic-style' electrochemical analysis of the mercury/water biphasic system post-sonication, to studying the interaction of marine phytoplankton using electrochemistry, and theoretically, simulations providing new insights to non-ideal interactions in voltammetry leading to phase-transition like behaviour. The scientific scope of the chapters is broad and multi-disciplinary, some may even seem 'wacky'; but, they are all at-heart fundamentally based in electrochemistry and are adventurous projects pushing beyond the traditional boundaries of the current field. The novelty and scientific advances of each Chapter are summarised below. Chapter 1 serves to introduce the fundamental concepts of electrochemistry, which are the building blocks for the projects discussed subsequently in this thesis. Here the discussion includes equilibrium electrochemistry, electrode kinetics and mass transport. Moreover, different aspect of electrochemistry in practice are discussed, such as the use of a three-electrode system, the effects of electrode geometry, and the voltammetric techniques – chronoamperometry and cyclic voltammetry. For electrons to transfer across an electrode interface, the analyte must come within an electron tunnelling distance of the electrode. What if the analyte is insoluble in solution and the unavoidable sedimentation of solids voids contact with the electrode? Chapter 2 tackles this problem by facilitating the electrochemistry of insoluble solids with a bespoke carbon-black composite. The latter is used as a modification to the electrode so as to bind the insoluble analyte, provide electrical contact and at the same time it is sufficiently porous allowing the composite to 'see' the electrolyte solution. The electrochemical behaviour of this composite material is fully characterised with three well-known aqueous insoluble redox couples, and are used to obtain the first cyclic voltammogram of solid red-cinnabar (α-HgS). Further highlighted in this Chapter is an in situ electrochemical X-ray diffraction experiment, facilitated by this carbon-black composite, demonstrating the possibility to electrochemically navigate across the narrow phase-width of the superconductor β-Fe₁₊ₓSe post-synthesis. What happens when ultra-sound sonication is applied to a mercury/water biphasic system? Chapter 3 presents a 'forensic-style' investigation, where the 'clouds' of grey particles seen emanating from the mercury/water interface were investigated and identified as [email protected] core-shell particles, characterised for the first time using a combination of electrochemical methods and X-ray diffraction experiments. Furthermore, as discovered electrochemically, sonication results in the simultaneous formation of molecular Hg(OH)₂ in the aqueous phase at a concentration close to a saturation limit of 0.24 mM; which is likely formed…

Subjects/Keywords: Physical Chemistry; Electrochemistry

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APA (6^th Edition):

Yang, M. (2020). Analytical electrochemistry : beyond the traditional boundaries. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:dbffa945-725d-47a1-9d83-cb36687f5f23 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816667

Chicago Manual of Style (16^th Edition):

Yang, Minjun. “Analytical electrochemistry : beyond the traditional boundaries.” 2020. Doctoral Dissertation, University of Oxford. Accessed February 27, 2021. http://ora.ox.ac.uk/objects/uuid:dbffa945-725d-47a1-9d83-cb36687f5f23 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816667.

MLA Handbook (7^th Edition):

Yang, Minjun. “Analytical electrochemistry : beyond the traditional boundaries.” 2020. Web. 27 Feb 2021.

Vancouver:

Yang M. Analytical electrochemistry : beyond the traditional boundaries. [Internet] [Doctoral dissertation]. University of Oxford; 2020. [cited 2021 Feb 27]. Available from: http://ora.ox.ac.uk/objects/uuid:dbffa945-725d-47a1-9d83-cb36687f5f23 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816667.

Council of Science Editors:

Yang M. Analytical electrochemistry : beyond the traditional boundaries. [Doctoral Dissertation]. University of Oxford; 2020. Available from: http://ora.ox.ac.uk/objects/uuid:dbffa945-725d-47a1-9d83-cb36687f5f23 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816667

Boston College

27. Gunathunge, Charuni Menaka. Surface-Adsorbed CO as a Molecular Probe for the In-Situ Characterization of Electrocatalytic Interfaces.

Degree: PhD, Chemistry, 2020, Boston College

URL: http://dlib.bc.edu/islandora/object/bc-ir:109013

► The properties of electrified interfaces, such as surface structure of metal catalyst, local pH, coverage of surface-adsorbed intermediates, interfacial electric field, and water structure, influence… (more)

▼ The properties of electrified interfaces, such as surface structure of metal catalyst, local pH, coverage of surface-adsorbed intermediates, interfacial electric field, and water structure, influence the activity and selectivity of electrocatalytic reactions. Because these interfacial properties often influence each other and undergo changes with applied potential, it is very challenging to identify the key characteristics of the interface that directly modulate electrocatalytic reactions. In this thesis, we demonstrate in-situ probing of electrochemical interfacial properties by employing surface-enhanced infrared (IR) absorption spectroscopy (SEIRAS) in conjunction with surface-adsorbed CO (COads) as a molecular probe of the Cu/aqueous electrolyte interface. This interface shows potential for the reduction of CO2 and CO to a wide variety of hydrocarbons. The CO and CO2 reduction reactions (CO/CO2RR) feature COads as an intermediate; therefore, this interface is conveniently probed by COads. In the first part if this thesis, we focus on investigating the dynamics of the surface morphology of the electrode during electrocatalysis. We found that the surface morphology of polycrystalline Cu undergoes reconstructions during CO/CO2RR. We determined that these reconstructions can be induced by COads and the local pH. As a result of the surface reconstructions, new specific surface sites form that can effect catalytic activity. For example, we detected an electrochemically inert COads population that appears as a result of reconstruction processes. Further, to form a rigorous connection between the product formation and the atomic-level surface morphology of rough polycrystalline Cu electrodes, we combined SEIRAS with differential electrochemical mass-spectrometry (DEMS). We established the potential-dependence of the line shape of the C≡O stretch band as an indicator of the atomic-level surface morphology. The last part of the thesis focuses on the determination of properties of the electrochemical double layer. Specifically, we elucidated the effects of cation identity on the electrochemical double layer. By evaluating the C≡O stretch frequency in the presence of alkali metal cations (Li+, K+, and Cs+), we determined that the promotion of the CO reduction reaction is associated with a cation-dependent interfacial field. Advisors/Committee Members: Matthias M. Waegele (Thesis advisor).

Subjects/Keywords: Catalysis; Electrochemistry; Spectroscopy

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APA (6^th Edition):

Gunathunge, C. M. (2020). Surface-Adsorbed CO as a Molecular Probe for the In-Situ Characterization of Electrocatalytic Interfaces. (Doctoral Dissertation). Boston College. Retrieved from http://dlib.bc.edu/islandora/object/bc-ir:109013

Chicago Manual of Style (16^th Edition):

Gunathunge, Charuni Menaka. “Surface-Adsorbed CO as a Molecular Probe for the In-Situ Characterization of Electrocatalytic Interfaces.” 2020. Doctoral Dissertation, Boston College. Accessed February 27, 2021. http://dlib.bc.edu/islandora/object/bc-ir:109013.

MLA Handbook (7^th Edition):

Gunathunge, Charuni Menaka. “Surface-Adsorbed CO as a Molecular Probe for the In-Situ Characterization of Electrocatalytic Interfaces.” 2020. Web. 27 Feb 2021.

Vancouver:

Gunathunge CM. Surface-Adsorbed CO as a Molecular Probe for the In-Situ Characterization of Electrocatalytic Interfaces. [Internet] [Doctoral dissertation]. Boston College; 2020. [cited 2021 Feb 27]. Available from: http://dlib.bc.edu/islandora/object/bc-ir:109013.

Council of Science Editors:

Gunathunge CM. Surface-Adsorbed CO as a Molecular Probe for the In-Situ Characterization of Electrocatalytic Interfaces. [Doctoral Dissertation]. Boston College; 2020. Available from: http://dlib.bc.edu/islandora/object/bc-ir:109013

28. NC DOCKS at The University of North Carolina at Greensboro; Zhang, Wendi. Carbon nanodots (CNDs): a comprehensive study of the photoluminescence, antioxidation and cellular uptake.

Degree: 2019, NC Docks

URL: http://libres.uncg.edu/ir/uncg/f/Zhang_uncg_0154D_12705.pdf

► Carbon Nanodots (CNDs) have attracted increasing attention owing to their excellent photoluminescence properties, antioxidation activity, lower toxicity and superior water solubility. These physiochemical properties make… (more)

▼ Carbon Nanodots (CNDs) have attracted increasing attention owing to their excellent photoluminescence properties, antioxidation activity, lower toxicity and superior water solubility. These physiochemical properties make CNDs promising candidates for biomedical applications including bioimaging, antioxidative agent and drug delivery, etc. However, the lack of consistency of understanding the fluorescence emission and antioxidation reactions in CNDs impedes their practical development in biomedical applications. Moreover, for CNDs cellular uptake study, there are rare reports on the nucleus penetrability of CNDs. Most uptake mechanisms focus on different types of nanoparticles (e.g. metal NPs or quantum dots). Little is known about the cellular uptake of CNDs especially the concentration influence. This dissertation research attempts to address these issues focusing on three aspects. (1) A new approach combining fluorescence spectroscopy and electrochemistry and energy gap analysis are used to investigate the photoluminescence mechanism of CNDs. (2) Electrochemistry and spectroscopy measurement are performed to investigate the antioxidative activities of CNDs against free radical DPPH• and reactive oxygen species (ROS) generated by xanthine/xanthine oxidase (XO) reaction. (3) nucleus penetrability of CNDs cell uptake is investigated with respect to CNDs’ concentration. We found that the excitation dependent fluorescence of the CNDs may be attributed to multiple energy gap levels arising from a combination of the Sp2 carbon core, surface functionalities (C=O, C–O, and COOH), and surface electronic state transitions. Regarding the antioxidative property, the result ofelectrochemical study for DPPH• scavenging is consistent with UV-Vis absorbance dose dependent manner following a coupled hydrogen atom transfer (HAT) reaction mechanism by the CNDs. For the cellular uptake of CNDs, a three-stage mechanism is proposed to explain the observation of concentration-dependent behavior of the nucleus penetrability. Overall, this comprehensive study of the photoluminescence, antioxidation and cellular uptake of CNDs and the findings should aid future development of practical utilization in bioimaging, antioxidation and drug delivery, such as in-vitro and in-vivo studies.

Subjects/Keywords: Nanoparticles; Photoluminescence; Electrochemistry

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APA (6^th Edition):

NC DOCKS at The University of North Carolina at Greensboro; Zhang, W. (2019). Carbon nanodots (CNDs): a comprehensive study of the photoluminescence, antioxidation and cellular uptake. (Thesis). NC Docks. Retrieved from http://libres.uncg.edu/ir/uncg/f/Zhang_uncg_0154D_12705.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

NC DOCKS at The University of North Carolina at Greensboro; Zhang, Wendi. “Carbon nanodots (CNDs): a comprehensive study of the photoluminescence, antioxidation and cellular uptake.” 2019. Thesis, NC Docks. Accessed February 27, 2021. http://libres.uncg.edu/ir/uncg/f/Zhang_uncg_0154D_12705.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

NC DOCKS at The University of North Carolina at Greensboro; Zhang, Wendi. “Carbon nanodots (CNDs): a comprehensive study of the photoluminescence, antioxidation and cellular uptake.” 2019. Web. 27 Feb 2021.

Vancouver:

NC DOCKS at The University of North Carolina at Greensboro; Zhang W. Carbon nanodots (CNDs): a comprehensive study of the photoluminescence, antioxidation and cellular uptake. [Internet] [Thesis]. NC Docks; 2019. [cited 2021 Feb 27]. Available from: http://libres.uncg.edu/ir/uncg/f/Zhang_uncg_0154D_12705.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

NC DOCKS at The University of North Carolina at Greensboro; Zhang W. Carbon nanodots (CNDs): a comprehensive study of the photoluminescence, antioxidation and cellular uptake. [Thesis]. NC Docks; 2019. Available from: http://libres.uncg.edu/ir/uncg/f/Zhang_uncg_0154D_12705.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Indian Institute of Science

29. Mukherjee, Ayash Kanto. DC & AC Transport In Conducting Polymers And Devices.

Degree: PhD, Faculty of Science, 2011, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/1546

Subjects/Keywords: Polymer - Electrochemistry; Electrochemistry; Conducting Polymers; Electrochemistry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mukherjee, A. K. (2011). DC & AC Transport In Conducting Polymers And Devices. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/1546

Chicago Manual of Style (16^th Edition):

Mukherjee, Ayash Kanto. “DC & AC Transport In Conducting Polymers And Devices.” 2011. Doctoral Dissertation, Indian Institute of Science. Accessed February 27, 2021. http://etd.iisc.ac.in/handle/2005/1546.

MLA Handbook (7^th Edition):

Mukherjee, Ayash Kanto. “DC & AC Transport In Conducting Polymers And Devices.” 2011. Web. 27 Feb 2021.

Vancouver:

Mukherjee AK. DC & AC Transport In Conducting Polymers And Devices. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2011. [cited 2021 Feb 27]. Available from: http://etd.iisc.ac.in/handle/2005/1546.

Council of Science Editors:

Mukherjee AK. DC & AC Transport In Conducting Polymers And Devices. [Doctoral Dissertation]. Indian Institute of Science; 2011. Available from: http://etd.iisc.ac.in/handle/2005/1546

Rhodes University

30. Chauke, Vongani Portia. Synthesis, photochemical and photophysical properties of gallium and indium phthalocyanine derivatives.

Degree: Faculty of Science, Chemistry, 2008, Rhodes University

URL: http://hdl.handle.net/10962/d1005040

► The syntheses of octasubstituted and unsusbstitituted Gallium(III) chloride and indium(III) chloride phthalocyanines (GaPc and InPc), their photophysical, photochemical and nonlinear optical parameters are hereby presented.… (more)

▼ The syntheses of octasubstituted and unsusbstitituted Gallium(III) chloride and indium(III) chloride phthalocyanines (GaPc and InPc), their photophysical, photochemical and nonlinear optical parameters are hereby presented. The photocatalytic oxidation of 1-hexene using the synthesized GaPc and InPc complexes as well as electrochemical characterization is also presented in this thesis. Fluorescence quantum yields do not vary much among the four Ga complexes, except for complex 21c; therefore it was concluded that the effect of substituents is not significant among them. Solvents however, had an effect on the results. Lower Φ[subscript F] values were obtained in low viscosity solvents like toluene, relative to highly viscous solvents, such as DMSO. The triplet quantum yields were found to be lower in DMSO than in DMF and toluene. The rate constants for fluorescence, intersystem crossing and internal conversion as well as fluorescence and triplet lifetimes are reported. Photodegradation and singlet oxygen quantum yields have also been reported. There was no clear correlation between the latter parameters. It was however established that the four gallium MPcs were stable, within the allowed stability range for phthalocyanines. High quantum yields of triplet state (Φ[subscript T] ranging from 0.70 to 0.91 in dimethysulfoxide, DMSO) and singlet oxygen generation (Φ[subscript greek capital letter delta], ranging from 0.61 to 0.79 in DMSO) were obtained. Short triplet lifetimes 50 to 60 μs were obtained in DMSO). Calculated non-linear parameters of these complexes are compared with those of the corresponding GaPc derivatives and tetrasubstituted GaPc and InPc complexes. The optical limiting threshold intensity (I[subscript lim]) values for the InPc and GaPc derivatives were calculated and compared with those of corresponding tetrasubstituted InPc and GaPc complexes. The octasubstituted were found to be better optical limiters. Photocatalytic oxidation of 1-hexene by GaPc (21a-c) and InPc (22a-c) derivatives is also presented. The photocatalytic oxidation products for 1-hexene were 1,2- epoxyhexane and 1-hexen-3-ol. The % conversion values of 1-hexene and % selectivity of 1,2-epoxyhexane were generally higher for InPc derivatives. Even though InPc derivatives showed better photocatalytic results than GaPc derivatives, the former were less stable relative to the latter. Both type I and type II mechanism were implicated in the photocatalysis mechanism.

Subjects/Keywords: Phthalocyanines; Photochemotherapy; Electrochemistry; Gallium; Indium

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chauke, V. P. (2008). Synthesis, photochemical and photophysical properties of gallium and indium phthalocyanine derivatives. (Thesis). Rhodes University. Retrieved from http://hdl.handle.net/10962/d1005040

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chauke, Vongani Portia. “Synthesis, photochemical and photophysical properties of gallium and indium phthalocyanine derivatives.” 2008. Thesis, Rhodes University. Accessed February 27, 2021. http://hdl.handle.net/10962/d1005040.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chauke, Vongani Portia. “Synthesis, photochemical and photophysical properties of gallium and indium phthalocyanine derivatives.” 2008. Web. 27 Feb 2021.

Vancouver:

Chauke VP. Synthesis, photochemical and photophysical properties of gallium and indium phthalocyanine derivatives. [Internet] [Thesis]. Rhodes University; 2008. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10962/d1005040.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chauke VP. Synthesis, photochemical and photophysical properties of gallium and indium phthalocyanine derivatives. [Thesis]. Rhodes University; 2008. Available from: http://hdl.handle.net/10962/d1005040

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations