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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

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 2020 Feb 26]. 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 Georgia

2. Srisook, Nattapong. Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor formation by EC-ALE.

Degree: PhD, Chemistry, 2004, University of Georgia

URL: http://purl.galileo.usg.edu/uga_etd/srisook_nattapong_200408_phd

► Electrochemical atomic layer epitaxy (EC-ALE) has been developed in this research group to electrochemically prepare thin films of compound semiconductors. It is an electrochemical analog… (more)

▼ Electrochemical atomic layer epitaxy (EC-ALE) has been developed in this research group to electrochemically prepare thin films of compound semiconductors. It is an electrochemical analog of atomic layer epitaxy (ALE), where a compound is grown in layer-bylayer fashion. A surface limited reaction, underpotential deposition (UPD), is used to deposit constituent elements one monolayer at a time. The EC-ALE promotes two-dimensional growth, resulting in better control of composition and structure in deposited film than conventional electrochemical co-deposition. The composition of films grown using EC-ALE is initially approximated from the charges passed during depositions. Faraday’s law is used to calculate the amounts of deposited elements. In general, the coulometric results indicate the films are off stoichiometric. However, electron microprobe analysis (EPMA) suggests otherwise, that the films are quite stoichiometric. The differences may correspond to side reactions, such as hydrogen evolution, oxygen reduction, and contaminants, which result in extra charges and errors in the composition calculations. An electrochemical quartz crystal microbalance (EQCM) is capable of measuring small mass changes on its surface. A flow cell EQCM was constructed to study the formation of various metal chalcogenides using EC-ALE. The detailed description of the flow cell EQCM is described. The design of the flow cell currently used in this laboratory was modified to accommodate the quartz crystal oscillator. Two pumping methods (He pressure and peristaltic pump) were used to flow solutions with acceptable noise level in ?f measurements. Higher solution flow rates were obtained by using the peristaltic pump. When solution flow was stopped, shifts in ?f values were observed, associated with changes in pressure. The flow cell EQCM was used to grow CdSe and PbTe. Cyclic voltammetry was used to determine UPD and bulk potentials for each element. A series of depositions was carried out with various deposition programs using the UPD potentials. Both current and ?f were measured as a function of deposition time and used to calculate coverages of deposited elements. With these results, it was determined that extra charges corresponded to the reduction of oxygen dissolved in deposition solutions. The optimized deposition programs for CdSe and PbTe were also suggested. Advisors/Committee Members: John L. Stickney.

Subjects/Keywords: Electrochemistry

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Srisook, N. (2004). Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor formation by EC-ALE. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/srisook_nattapong_200408_phd

Chicago Manual of Style (16^th Edition):

Srisook, Nattapong. “Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor formation by EC-ALE.” 2004. Doctoral Dissertation, University of Georgia. Accessed February 26, 2020. http://purl.galileo.usg.edu/uga_etd/srisook_nattapong_200408_phd.

MLA Handbook (7^th Edition):

Srisook, Nattapong. “Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor formation by EC-ALE.” 2004. Web. 26 Feb 2020.

Vancouver:

Srisook N. Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor formation by EC-ALE. [Internet] [Doctoral dissertation]. University of Georgia; 2004. [cited 2020 Feb 26]. Available from: http://purl.galileo.usg.edu/uga_etd/srisook_nattapong_200408_phd.

Council of Science Editors:

Srisook N. Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor formation by EC-ALE. [Doctoral Dissertation]. University of Georgia; 2004. Available from: http://purl.galileo.usg.edu/uga_etd/srisook_nattapong_200408_phd

University of Georgia

3. Jayaraju, Nagarajan. Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor and metal thin flms formation by electrochemical atomic layer deposition (ALD).

Degree: MS, Chemistry, 2006, University of Georgia

URL: http://purl.galileo.usg.edu/uga_etd/jayaraju_nagarajan_200612_ms

► Electrochemical atomic layer deposition (ALD) has been developed in this research group to grow thin films of compound semiconductors. It is an electrochemical analog of… (more)

▼ Electrochemical atomic layer deposition (ALD) has been developed in this research group to grow thin films of compound semiconductors. It is an electrochemical analog of atomic layer epitaxy (ALE) and atomic layer deposition (ALD), all of which are based on growth of material a monolayer at a time. Under potential deposition (UPD), electrochemical surface limited reactions are used to form the desired materials in a series of steps to form one monolayer at a time. Electrochemical ALD promotes two-dimensional growth, resulting in better control of composition and structure than conventional electrodeposition method. Electrochemical Atomic Layer Deposition (ALD) has recently been used to grow thin films of metals (Cu, Pt on Au) using Surface Limited Redox Replacement (SLRR) reaction. In SLRR, an atomic layer of a less noble metal is replaced by an atomic layer of a more noble metal at Open Circuit. Electrochemical quartz crystal microbalance (EQCM) is an in-situ mass sensitive device which can measure small changes on its surface. A flow cell EQCM was constructed in our laboratory to study the formation of various compound semiconductors and metal thin films via electrochemical Atomic Layer Deposition (ALD). The regular flow cell was modified to accommodate quartz crystal. Solutions were pushed in to cell either by He pressure or peristaltic pump. Solutions are flowed continiously in to the cell to avoid shifts in [delta]f values observed when the flow is stopped. Stoichiometry of thin films based on charge and from the electron probe micro analysis (EPMA) doesn’t correspond with each other. The extra charges correspond to the side reactions, such as hydrogen evolution, oxygen reduction, and contaminants. EQCM is used to calculate the mass changes during deposition and to better understand the deposition process. Automated flow cell EQCM was used to grow CdSe, CdTe, HgTe, CdTe/HgTe, Cu and Pt thin films. LabView program is used to run the flow cell. Current and ûf were measured simultaneously as a function of deposition time. The coverage in then calculated based on the charge and mass of deposited elements. Advisors/Committee Members: John L. Stickney.

Subjects/Keywords: Electrochemistry

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Jayaraju, N. (2006). Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor and metal thin flms formation by electrochemical atomic layer deposition (ALD). (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/jayaraju_nagarajan_200612_ms

Chicago Manual of Style (16^th Edition):

Jayaraju, Nagarajan. “Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor and metal thin flms formation by electrochemical atomic layer deposition (ALD).” 2006. Masters Thesis, University of Georgia. Accessed February 26, 2020. http://purl.galileo.usg.edu/uga_etd/jayaraju_nagarajan_200612_ms.

MLA Handbook (7^th Edition):

Jayaraju, Nagarajan. “Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor and metal thin flms formation by electrochemical atomic layer deposition (ALD).” 2006. Web. 26 Feb 2020.

Vancouver:

Jayaraju N. Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor and metal thin flms formation by electrochemical atomic layer deposition (ALD). [Internet] [Masters thesis]. University of Georgia; 2006. [cited 2020 Feb 26]. Available from: http://purl.galileo.usg.edu/uga_etd/jayaraju_nagarajan_200612_ms.

Council of Science Editors:

Jayaraju N. Electrochemical quartz crystal microbalance (EQCM) studies of compound semiconductor and metal thin flms formation by electrochemical atomic layer deposition (ALD). [Masters Thesis]. University of Georgia; 2006. Available from: http://purl.galileo.usg.edu/uga_etd/jayaraju_nagarajan_200612_ms

Tokyo Institute of Technology / 東京工業大学

4. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

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 2020 Feb 26]. 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

5. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. http://hdl.handle.net/1957/34522.

MLA Handbook (7^th Edition):

Ramachandran, Kartik. “Synthesis and characterization of novel materials for electrochemical devices.” 1996. Web. 26 Feb 2020.

Vancouver:

Ramachandran K. Synthesis and characterization of novel materials for electrochemical devices. [Internet] [Masters thesis]. Oregon State University; 1996. [cited 2020 Feb 26]. 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 Limerick

6. 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

► 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 in… (more)

Subjects/Keywords: electrochemistry; KOH

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Quill N. Formation of nanoporous InP in KOH and KCl: electrochemistry and electron microscopy. [Internet] [Thesis]. University of Limerick; 2012. [cited 2020 Feb 26]. 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

7. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

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 2020 Feb 26]. 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

Michigan State University

8. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Saltonstall RB. The temperature coefficient of the cericcerous electrode. [Internet] [Doctoral dissertation]. Michigan State University; 1935. [cited 2020 Feb 26]. 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

Michigan State University

9. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Beyerlein, Floyd Hilbert 1. Theory and application of chronopotentiometry for measuring heterogeneous electron transfer kinetics. [Internet] [Doctoral dissertation]. Michigan State University; 1970. [cited 2020 Feb 26]. 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

University of Houston

10. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Cui Y1. Electrochemistry, Acid-base Properties and Spectroelectrochemistry of Porphyrins, Corroles, and Related Molecules. [Internet] [Doctoral dissertation]. University of Houston; 2015. [cited 2020 Feb 26]. 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

University of Iowa

11. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

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 2020 Feb 26]. 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

Texas State University – San Marcos

12. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Frazer JB. Impact of Processing Parameters on Conductive Polymer Electroactivity. [Internet] [Masters thesis]. Texas State University – San Marcos; 2018. [cited 2020 Feb 26]. 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 Louisville

13. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Carroll S. Application of microfabrication in electrochemical sensing. [Internet] [Doctoral dissertation]. University of Louisville; 2011. [cited 2020 Feb 26]. 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 Florida

14. 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: http://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

Record Details Similar Records Cite « Share

❌

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

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 http://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 26, 2020. http://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. 26 Feb 2020.

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 2020 Feb 26]. Available from: http://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: http://ufdc.ufl.edu/UFE0051021

University of Manchester

15. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Setterfield-Price BM. Electrochemical Reduction of Carbon Dioxide. [Internet] [Doctoral dissertation]. University of Manchester; 2013. [cited 2020 Feb 26]. 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

Latrobe University

16. 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.

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Barbante GJ. Electrochemiluminescence of ruthenium polypyridyl complexes in solution and solid-state. [Internet] [Doctoral dissertation]. Latrobe University; 2011. [cited 2020 Feb 26]. 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

University of California – Berkeley

17. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

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 2020 Feb 26]. 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 Oklahoma

18. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

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 2020 Feb 26]. 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

Rhodes University

19. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Masilela N. Photophysical and photoelectrochemical properties of water soluble metallophthalocyanines. [Internet] [Thesis]. Rhodes University; 2010. [cited 2020 Feb 26]. 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

20. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Idowu MA. Photophysical and photochemical behaviour of metallophthalocyanines effect of nanoparticles and molecules of biological importance. [Internet] [Thesis]. Rhodes University; 2009. [cited 2020 Feb 26]. 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 North Texas

21. Bjelkevig, Cameron. Surface Chemical Deposition of Advanced Electronic Materials.

Degree: 2010, University of North Texas

URL: https://digital.library.unt.edu/ark:/67531/metadc67938/

► The focus of this work was to examine the direct plating of Cu on Ru diffusion barriers for use in interconnect technology and the substrate… (more)

▼ The focus of this work was to examine the direct plating of Cu on Ru diffusion barriers for use in interconnect technology and the substrate mediated growth of graphene on boron nitride for use in advanced electronic applications. The electrodeposition of Cu on Ru(0001) and polycrystalline substrates (with and without pretreatment in an iodine containing solution) has been studied by cyclic voltammetry (CV), current-time transient measurements (CTT), in situ electrochemical atomic force microscopy (EC-AFM), and X-ray photoelectron spectroscopy (XPS). The EC-AFM data show that at potentials near the OPD/UPD threshold, Cu crystallites exhibit pronounced growth anisotropy, with lateral dimensions greatly exceeding vertical dimensions. XPS measurements confirmed the presence and stability of adsorbed I on the Ru surface following pre-treatment in a KI/H2SO4 solution and following polarization to at least −200 mV vs. Ag/AgCl. CV data of samples pre-reduced in I-containing electrolyte exhibited a narrow Cu deposition peak in the overpotential region and a UPD peak. The kinetics of the electrodeposited Cu films was investigated by CTT measurements and applied to theoretical models of nucleation. The data indicated that a protective I adlayer may be deposited on an air-exposed Ru electrode as the oxide surface is electrochemically reduced, and that this layer will inhibit reformation of an oxide during the Cu electroplating process. A novel method for epitaxial graphene growth directly on a dielectric substrate of systematically variable thickness was studied. Mono/multilayers of BN(111) were grown on Ru(0001) by atomic layer deposition (ALD), exhibiting a flat (non-nanomesh) R30(3x3) structure. BN(111) was used as a template for growth of graphene by chemical vapor deposition (CVD) of C2H4 at 1000 K. Characterization by LEED, Auger, STM/STS and Raman indicate the graphene is in registry with the BN substrate, and exhibits a HOPG-like 0 eV bandgap density-of-states (DOS). Advisors/Committee Members: Kelber, Jeffery A., Cooke, Stephen A., Omary, Mohammad, Colombo, Luigi, Acree, William E. (William Eugene).

Subjects/Keywords: Graphene; CVD; electrochemistry

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Bjelkevig, C. (2010). Surface Chemical Deposition of Advanced Electronic Materials. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc67938/

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):

Bjelkevig, Cameron. “Surface Chemical Deposition of Advanced Electronic Materials.” 2010. Thesis, University of North Texas. Accessed February 26, 2020. https://digital.library.unt.edu/ark:/67531/metadc67938/.

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

MLA Handbook (7^th Edition):

Bjelkevig, Cameron. “Surface Chemical Deposition of Advanced Electronic Materials.” 2010. Web. 26 Feb 2020.

Vancouver:

Bjelkevig C. Surface Chemical Deposition of Advanced Electronic Materials. [Internet] [Thesis]. University of North Texas; 2010. [cited 2020 Feb 26]. Available from: https://digital.library.unt.edu/ark:/67531/metadc67938/.

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

Council of Science Editors:

Bjelkevig C. Surface Chemical Deposition of Advanced Electronic Materials. [Thesis]. University of North Texas; 2010. Available from: https://digital.library.unt.edu/ark:/67531/metadc67938/

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

University of New South Wales

22. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Lai LMH. Nanoparticle biosensors: understanding and detection at low concentrations. [Internet] [Doctoral dissertation]. University of New South Wales; 2011. [cited 2020 Feb 26]. 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 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Tavallaie R. Electrochemical microRNA biosenosrs. [Internet] [Doctoral dissertation]. University of New South Wales; 2015. [cited 2020 Feb 26]. 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 Toronto

24. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. http://hdl.handle.net/1807/25556.

MLA Handbook (7^th Edition):

Dounin, Vladimir. “Innovative Approaches for the Electrochemical Detection of Acetylcholinesterase Inhibitors.” 2010. Web. 26 Feb 2020.

Vancouver:

Dounin V. Innovative Approaches for the Electrochemical Detection of Acetylcholinesterase Inhibitors. [Internet] [Masters thesis]. University of Toronto; 2010. [cited 2020 Feb 26]. 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

Queens University

25. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

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 2020 Feb 26]. 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 Texas – Austin

26. Dick, Jeffrey Edward. Studies in the electrochemistry of single atoms, molecules, and nanoparticles.

Degree: PhD, Chemistry, 2019, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/3107

► Analytical chemistry is entering an exciting era where instead of measuring over ensemble quantities of analyte species, single analyte species can be counted and studied… (more)

▼ Analytical chemistry is entering an exciting era where instead of measuring over ensemble quantities of analyte species, single analyte species can be counted and studied one at a time. Intrinsic in these experiments are extremely low limits of quantitation (sub-picomolar) and, in principle, an analytical limit of detection of one. These studies also offer methods to probe the chemical and physical properties of single analyte species, which may be vastly different than properties measured over ensembles. The work in this dissertation presents several ultrasensitive methods using electrochemistry to selectively detect and study the chemical and physical properties of single entities, namely single isolated clusters, molecules, and nanoparticles. In these experiments, sub-picomolar concentrations are used to control mass transfer of analyte species to the micro or nanoelectrode such that stochastic collisions can be observed. Chapter 1 gives an introduction to stochastic electrochemical processes relevant to this dissertation. Chapter 2 investigates the collisions of single emulsion droplets (r ~ 300 nm) and their applications to bulk coulometry, electrogenerated chemiluminescence, the interface between two immiscible electrolyte solutions, and differentiation of cancerous T cells (radius ~ 3-12 μm) from healthy cells. Chapter 3 extends the stochastic study of biological species by investigating methods to selectively detect single murine cytomegalovirus particles (radius ~ 100 nm) in the urine of infected mice. The detection of single proteins (radius ~ 2-8 nm) and DNA molecules is also described. Chapter 4 pushes the limits of detection toward single ions using electrocatalytic amplification. Calibration curves obtained displayed one of the lowest limits of quantitation in analytical chemistry (femtomolar, 10⁻¹⁵ M) and the highest sensitivity for any electrochemical technique to date. The feasibility of fabricating a catalyst on an atom-by-atom basis was also explored. Platinum was electrodeposited onto carbon nanoelectrodes from femtomolar solutions of hexachloroplatinic acid, and voltammograms on the nanodeposits were attained Advisors/Committee Members: Bard, Allen J. (advisor), Faulkner, Larry R. (committee member), Mullins, Charles B. (committee member), Rose, Michael J. (committee member).

Subjects/Keywords: Analytical chemistry; Electrochemistry

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Dick, J. E. (2019). Studies in the electrochemistry of single atoms, molecules, and nanoparticles. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/3107

Chicago Manual of Style (16^th Edition):

Dick, Jeffrey Edward. “Studies in the electrochemistry of single atoms, molecules, and nanoparticles.” 2019. Doctoral Dissertation, University of Texas – Austin. Accessed February 26, 2020. http://dx.doi.org/10.26153/tsw/3107.

MLA Handbook (7^th Edition):

Dick, Jeffrey Edward. “Studies in the electrochemistry of single atoms, molecules, and nanoparticles.” 2019. Web. 26 Feb 2020.

Vancouver:

Dick JE. Studies in the electrochemistry of single atoms, molecules, and nanoparticles. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2019. [cited 2020 Feb 26]. Available from: http://dx.doi.org/10.26153/tsw/3107.

Council of Science Editors:

Dick JE. Studies in the electrochemistry of single atoms, molecules, and nanoparticles. [Doctoral Dissertation]. University of Texas – Austin; 2019. Available from: http://dx.doi.org/10.26153/tsw/3107

27. 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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

Vancouver:

Bergman J. Development of Electrochemical Biosensors for Neurochemical Applications. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2018. [cited 2020 Feb 26]. 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

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

Record Details Similar Records Cite « Share

❌

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

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 26, 2020. 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. 26 Feb 2020.

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 2020 Feb 26]. 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: 2005, Indian Institute of Science

URL: http://hdl.handle.net/2005/1546

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

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Mukherjee, A. K. (2005). DC & AC Transport In Conducting Polymers And Devices. (Thesis). Indian Institute of Science. Retrieved from http://hdl.handle.net/2005/1546

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):

Mukherjee, Ayash Kanto. “DC & AC Transport In Conducting Polymers And Devices.” 2005. Thesis, Indian Institute of Science. Accessed February 26, 2020. http://hdl.handle.net/2005/1546.

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

MLA Handbook (7^th Edition):

Mukherjee, Ayash Kanto. “DC & AC Transport In Conducting Polymers And Devices.” 2005. Web. 26 Feb 2020.

Vancouver:

Mukherjee AK. DC & AC Transport In Conducting Polymers And Devices. [Internet] [Thesis]. Indian Institute of Science; 2005. [cited 2020 Feb 26]. Available from: http://hdl.handle.net/2005/1546.

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

Council of Science Editors:

Mukherjee AK. DC & AC Transport In Conducting Polymers And Devices. [Thesis]. Indian Institute of Science; 2005. Available from: http://hdl.handle.net/2005/1546

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

Indian Institute of Science

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

Degree: 2005, Indian Institute of Science

URL: http://etd.iisc.ernet.in/handle/2005/1546 ; http://etd.ncsi.iisc.ernet.in/abstracts/1974/G19162-Abs.pdf

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

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Mukherjee, A. K. (2005). DC & AC Transport In Conducting Polymers And Devices. (Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ernet.in/handle/2005/1546 ; http://etd.ncsi.iisc.ernet.in/abstracts/1974/G19162-Abs.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):

Mukherjee, Ayash Kanto. “DC & AC Transport In Conducting Polymers And Devices.” 2005. Thesis, Indian Institute of Science. Accessed February 26, 2020. http://etd.iisc.ernet.in/handle/2005/1546 ; http://etd.ncsi.iisc.ernet.in/abstracts/1974/G19162-Abs.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):

Mukherjee, Ayash Kanto. “DC & AC Transport In Conducting Polymers And Devices.” 2005. Web. 26 Feb 2020.

Vancouver:

Mukherjee AK. DC & AC Transport In Conducting Polymers And Devices. [Internet] [Thesis]. Indian Institute of Science; 2005. [cited 2020 Feb 26]. Available from: http://etd.iisc.ernet.in/handle/2005/1546 ; http://etd.ncsi.iisc.ernet.in/abstracts/1974/G19162-Abs.pdf.

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

Council of Science Editors:

Mukherjee AK. DC & AC Transport In Conducting Polymers And Devices. [Thesis]. Indian Institute of Science; 2005. Available from: http://etd.iisc.ernet.in/handle/2005/1546 ; http://etd.ncsi.iisc.ernet.in/abstracts/1974/G19162-Abs.pdf

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

Open Access Theses and Dissertations