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You searched for +publisher:"Virginia Commonwealth University" +contributor:("Curtis Taylor"). Showing records 1 – 2 of 2 total matches.

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Virginia Commonwealth University

1. Yu, Dongshan. Controlled synthesis of ZnO nanowires towards the fabrication of solar cells.

Degree: MS, Mechanical Engineering, 2009, Virginia Commonwealth University

In recent years, quasi-one-dimensional materials have attracted a lot of research attention due to their remarkable properties, and their potential as building blocks for nanoscale electronic and optoelectronic devices. A modified chemical vapor deposition (CVD) method has been used to synthesize ZnO nanowires. Electron microscopy and other characterization techniques show that nanowires having distinct morphologies when grown under different conditions. The effects of reaction parameters including reaction time, temperature, carrier gas flow rate, substrates and catalyst material upon the size, shape, and density of ZnO nanowire arrays have been investigated. Excitonic solar cells —including Gratzel-type cells, organic and hybrid organic/inorganic solar cells—are promising devices for inexpensive, large-scale solar energy conversion. Hybrid organic/inorganic solar cells are made from composites of conjugated polymers with nanostructure metal oxides, in which the polymer component serves the function of both light absorber and hole conductor, and the ZnO nanowire arrays act as the electron conductors. Organic solar cells have been fabricated from environmentally friendly water-soluble polymers and ZnO nanowire arrays. Advisors/Committee Members: James McLeskey, Curtis Taylor, Gary Tepper, Tarek Trad.

Subjects/Keywords: zinc oxide nanowire; solar cells; nanotechnology; chemical vapor deposition.; Engineering

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

APA (6th Edition):

Yu, D. (2009). Controlled synthesis of ZnO nanowires towards the fabrication of solar cells. (Thesis). Virginia Commonwealth University. Retrieved from https://scholarscompass.vcu.edu/etd/1856

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

Chicago Manual of Style (16th Edition):

Yu, Dongshan. “Controlled synthesis of ZnO nanowires towards the fabrication of solar cells.” 2009. Thesis, Virginia Commonwealth University. Accessed May 20, 2019. https://scholarscompass.vcu.edu/etd/1856.

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

MLA Handbook (7th Edition):

Yu, Dongshan. “Controlled synthesis of ZnO nanowires towards the fabrication of solar cells.” 2009. Web. 20 May 2019.

Vancouver:

Yu D. Controlled synthesis of ZnO nanowires towards the fabrication of solar cells. [Internet] [Thesis]. Virginia Commonwealth University; 2009. [cited 2019 May 20]. Available from: https://scholarscompass.vcu.edu/etd/1856.

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

Council of Science Editors:

Yu D. Controlled synthesis of ZnO nanowires towards the fabrication of solar cells. [Thesis]. Virginia Commonwealth University; 2009. Available from: https://scholarscompass.vcu.edu/etd/1856

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


Virginia Commonwealth University

2. McCumiskey, Edward. Mechanical Characterization of Nanocomposite CdSe Quantum Dot – MEH-PPV Polymer Thin Films via Nanoindentation.

Degree: MS, Mechanical Engineering, 2009, Virginia Commonwealth University

Progress in the burgeoning field of organic electronics is enabling the development of novel technologies such as low-cost, printable solar cells and flexible, high-resolution displays. One exciting avenue of research in this field is nanostructured hybrid organics such as quantum dot (QD)-polymer devices. The incorporation of QDs can greatly improve a device’s efficiency and gives one the ability to tune its electrical and optical characteristics. In order for such technologies to be commercially viable, it is important to classify their mechanical integrity and reliability. Surprisingly little is known about the mechanical properties of QD-polymer thin films (<100 nm). This is in part due to challenges of: (1) isolating the mechanical response of a thin film from the underlying substrate, (2) obtaining a homogeneous dispersion of QDs in the film, and (3) the sensitivity of mechanical properties to the inherent rate dependence of polymer deformation (i.e., viscoelasticity). All of these challenges can introduce significant errors in the measurement of mechanical properties. Furthermore, the deformation mechanisms in nanocomposites are not well understood, so it is difficult to predict the effect of adding QDs on the mechanical behavior of films. In this thesis, these challenges are addressed for characterizing the mechanical properties of thin films of CdSe QD-poly[2-methoxy-5-2(2΄-ethylhexyloxy-p-phenylenevinylene)] (MEH-PPV) nanocomposites using quasi-static nanoindentation testing. Elastic modulus, hardness, and creep are measured as a function of QD concentration and loading and unloading rates. The QDs' ligands are removed by pyridine treatment prior to mixing with MEH-PPV to improve dispersion. The films are prepared via spin-coating onto glass substrates and subsequent annealing in air. Efforts are taken in the mechanical testing to minimize errors due to viscoelastic creep and interference from the substrate. Transmission electron microscopy reveals that the QDs are relatively well-dispersed in the polymer matrix. It is observed that adding QDs increases the elastic modulus (E) and hardness (H) of the films, while reducing the viscoelastic creep. Both E and H increase linearly with the volume percent of QDs. E ranges from 14.5 GPa to 52.7 GPa for pure MEH-PPV (0% QDs) and 100% QD films, respectively, while H ranges from 220 MPa to 1430 MPa for the same films, respectively. The films behave viscoelastically at lower QD loading, but assume a more granular character as the loading approaches 100%. Advisors/Committee Members: Curtis Taylor, James McLeskey, Samy El-Shall.

Subjects/Keywords: nanoindentation; nanocomposite; viscoelasticity; quantum dot; Engineering

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

APA (6th Edition):

McCumiskey, E. (2009). Mechanical Characterization of Nanocomposite CdSe Quantum Dot – MEH-PPV Polymer Thin Films via Nanoindentation. (Thesis). Virginia Commonwealth University. Retrieved from https://scholarscompass.vcu.edu/etd/1731

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

Chicago Manual of Style (16th Edition):

McCumiskey, Edward. “Mechanical Characterization of Nanocomposite CdSe Quantum Dot – MEH-PPV Polymer Thin Films via Nanoindentation.” 2009. Thesis, Virginia Commonwealth University. Accessed May 20, 2019. https://scholarscompass.vcu.edu/etd/1731.

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

MLA Handbook (7th Edition):

McCumiskey, Edward. “Mechanical Characterization of Nanocomposite CdSe Quantum Dot – MEH-PPV Polymer Thin Films via Nanoindentation.” 2009. Web. 20 May 2019.

Vancouver:

McCumiskey E. Mechanical Characterization of Nanocomposite CdSe Quantum Dot – MEH-PPV Polymer Thin Films via Nanoindentation. [Internet] [Thesis]. Virginia Commonwealth University; 2009. [cited 2019 May 20]. Available from: https://scholarscompass.vcu.edu/etd/1731.

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

Council of Science Editors:

McCumiskey E. Mechanical Characterization of Nanocomposite CdSe Quantum Dot – MEH-PPV Polymer Thin Films via Nanoindentation. [Thesis]. Virginia Commonwealth University; 2009. Available from: https://scholarscompass.vcu.edu/etd/1731

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

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