Browsing by Subject "Electronics"
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Item Colloidal nanocrystals with near-infrared optical properties : synthesis, characterization, and applications(2011-12) Panthani, Matthew George; Korgel, Brian Allan, 1969-; Dodabalapur, Ananth; Chelikowsky, James; Mullins, C. Buddie; Manthiram, ArumugamColloidal nanocrystals with optical properties in the near-infrared (NIR) are of interest for many applications such as photovoltaic (PV) energy conversion, bioimaging, and therapeutics. For PVs and other electronic devices, challenges in using colloidal nanomaterials often deal with the surfaces. Because of the high surface-to-volume ratio of small nanocrystals, surfaces and interfaces play an enhanced role in the properties of nanocrystal films and devices. Organic ligand-capped CuInSe2 (CIS) and Cu(InXGa1-X)Se2 (CIGS) nanocrystals were synthesized and used as the absorber layer in prototype solar cells. By fabricating devices from spray-coated CuInSe nanocrystals under ambient conditions, solar-to-electric power conversion efficiencies as high as 3.1% were achieved. Many treatments of the nanocrystal films were explored. Although some treatments increased the conductivity of the nanocrystal films, the best devices were from untreated CIS films. By modifying the reaction chemistry, quantum-confined CuInSeXS2-X (CISS) nanocrystals were produced. The potential of the CISS nanocrystals for targeted bioimaging was demonstrated via oral delivery to mice and imaging of nanocrystal fluorescence. The size-dependent photoluminescence of Si nanocrystals was measured. Si nanocrystals supported on graphene were characterized by conventional transmission electron microscopy and spherical aberration (Cs)-corrected scanning transmission electron microscopy (STEM). Enhanced imaging contrast and resolution was achieved by using Cs-corrected STEM with a graphene support. In addition, clear imaging of defects and the organic-inorganic interface was enabled by utilizing this technique.Item Long distance : for solo percussion, wind ensemble, and electronics(2014-05) Snowden, Steven, 1981-; Pinkston, RussellLong Distance is a work for solo percussion (marimba and vibraphone), wind ensemble, and electronics consisting of four movements and lasting approximately twenty minutes. Each movement is designed to be able to stand on its own and, when multiple movements are performed, their order is flexible. A version of this piece with no wind ensemble also exists and was commissioned by a consortium of 33 percussionists. From its inception, this solo version was composed with the possibility of expansion to a larger instrumentation in mind. In this paper, I will discuss and analyze many of the factors and influences involved in my composition process for this piece. This will include performance techniques, extracting and utilizing musical material from field recordings, audio processing techniques, orchestration, drawing musical inspiration from non-musical sources, and stylistic juxtaposition. In addition, I will provide some background on how this commission came about and how composition as a collaborative process shaped this piece especially in the context of working with such a large and diverse consortium.Item The Design and Construction of an Electronic Stop Watch(Texas Tech University, 1957-05) Dean, Joseph WindsorNot Available.