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Spring 2020
There is an increasing need of clean renewable energy sources to address the growing problems of greenhouse gas emission, global warming and climate change. The rapid consumption of fossil fuel resources has also contributed to toxic emissions and raised a question on sustainability of present...
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Fall 2017
Nanofabricated optically anisotropic uniaxial thin films with deep submicron feature sizes are emerging as potential platforms for low-loss all-dielectric meta-materials and for Dyakonov surface wave-based sub-wavelength optical confinement and guiding at interfaces with isotropic media. In this...
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Fall 2017
The use of organic, semiconducting polymers provides an attractive option to advance commercial solar photovoltaic technologies. These devices have the potential to be spray-coated on flexible, light-weight substrates and produced cheaply in high volumes; however, performance remains limited in...
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Spring 2015
This thesis is focused on the silicon-based anode materials for lithium-ion batteries (LIBs) as well as germanium-based electrode materials for sodium-ion batteries (NIBs). In our first attempt we studied electrochemical cycling stability and degradation mechanisms of silicon nanowires (SiNWs)...
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Spring 2015
Supramolecular rosette nanotubes (RNTs) are obtained by the hierarchical self-assembly of mono and twin G^C building blocks. The mono G^C motif is a fused bicyclic ring of guanine and cytosine with six self-complementary sets of hydrogen bonding sites, while the twin G^C motif is a covalently...
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Fall 2015
An investigation was conducted on heavy oil cracking using polarized hot stage microscopy and laser dynamic backscattering. Both of these in-situ techniques were used to monitor cracking reactions through the use of backscattering. The use of hot stage microscopy resulted in a series of...
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Fall 2014
In this thesis, a new technique named vapour-liquid-solid glancing angle deposition (VLS-GLAD) will be used to enhance structural control over branched nanowire (NW) arrays. NWs are 1D crystals that have been extensively applied in sensors, photovoltaic devices, and transistors. The functional...
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Fall 2014
Nanoscale materials offer opportunities to employ unique physical phenomena and performance enhancement in many applications, including energy conversion. The coupling of functional materials properties and nanoscale morphologies is paramount for the successful implementation of nanostructured...
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Synthesis and Characterization of TiO2 Nanowire and Nanotube Arrays for Increased Optoelectronic Functionality
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The n-type semiconducting, vertically oriented TiO2 nanotube and nanowire arrays constitute a mechanically robust, high surface area, easily functionalized architecture with vectorial electron percolation pathways and have been the focus of interest for variety of applications including but not...
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Fall 2014
Metamaterials are artificially engineered materials with tailored properties for applications in imaging, sensing, waveguiding and quantum optics. Even though they hold the potential for transformative impact, industrial applications have been impeded by large absorption losses in material...