Materials Literature
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The power conversion efficiency of solar cells is largely dependent on impurity levels in silicon. In the current investigations two sample preparation methods of silicon had been used before analysis - acid dissolution at atmospheric pressure and pressured microwave assisted technique. Quantification of impurities in…
Derivatives of 2-(4'-dimethylaminobenzylidene)-1,3-indandione (DMABI) are classical push-pull chromophores containing carbonyl groups like numerous other non-linear chromophores for electro-optical devices. The energy of the intramolecular charge transfer exciton of DMABI is determined by the difference of HOMO-LUMO e…
Vacuum microelectronic devices (VMDs) designed for bipolar charge operation hold great promise for applications in radiation-intensive and high-temperature environments. This novel class of devices was first realized in a microelectromechanical platform leveraging integrated carbon nanotube field emitters and an addre…
Er3+-doped precursor solutions were first prepared using 2,2,3,3,4,4,5,5-octafluoropentyl acrylate as a fluoromonomer, tetrahydrofurfuryl acrylate as a solubility enhancer, Ebecryl 220 as a cross-linking agent, Darocur 4265 as a radical photoinitiator and erbium(III) trifluoromethane sulfonate as an erbium source with…
The temporal bright and dark image sticking phenomena of the counter structure are compared with those of the coplanar structure. For both the counter and coplanar structures, the temporal bright and dark image sticking phenomena are examined by measuring the IR emission profile, displayed luminance, perceived luminan…
$SnO_2@carbon$ tube-core nanowire was synthesized via a facile self-organized method, which was in situ by one step via Chemical Vapor Deposition. The resulting composite was characterized by scanning electron microscopy, X-ray diffraction and transmission electron microscope. The diameter of the single nanowire is be…
The influence of substrate and post-annealing temperature steps on the unique physical, structural, morphology and optical properties of CdTe thin films deposited by a non-vacuum spray process were investigated for solar cells. Scanning electron microscopy (SEM) and X-ray diffraction spectrometer (XRD) were employed t…
Recently, there has been an explosion of literature dedicated to organic electrodes for energy storage applications. While inorganic materials, especially oxides, have generally being explored for these applications, the guiding principles for successful electrical energy storage-maximizing capacity and energy density…
У роботі представлений термодинамічний аналіз ефективності циркуляційного способу нагріву пеку. Основним показником ступеня термодинамічної досконалості процесу є ексергетичний коефіцієнт корисної дії (ККД) η екс
O CALDose_X e uma ferramenta computacional desenvolvida para organizar e apresentar simulacoes de exames de raios-X em adultos. O software pode apresentar resultados de distribuicoes de doses absolutas desde que se conheca a grandeza de normalizacao INAK (INcident Air Kerma). O INAK e obtido atraves das curvas de rend…
In this dissertation we present work on the development, characterization, and analysis of an easy-to-fabricate, reusable bioinspired switchable adhesive that consists of a film-terminated fibrillar layer atop a substrate. We use a dynamic rod model and stability analysis to define and analyze the buckling of a fibril…
Dentre os processos de fabricacao utilizados atualmente, a soldagem tem destaque no ramo industrial. Os produtos que passam por esse processo encontram-se em nosso dia-a-dia, tais como: bicicletas, carros, motos, cadeiras de metal ou aluminio, portoes, grades, avioes, pontes e etc. A soldagem e aplicada a metais ferro…
The mixed glass former effect (MGFE) is a non-linear variation of transport properties as a function of the glass former composition when one glass network former is replaced by another one. In order to better understand the MGFE, the effect of the variation of the glass former composition on the transport of a select…
High performance catalysts or energy devices such as solar cells and batteries which involve reactions and transport problems require nanostructured functional materials that are highly ordered mesoporous and crystalline materials. The self-assembly based structure direction of functional inorganic materials by block…
This thesis presents a study of single-walled carbon nanotubes (SWNTs) using revised Cosserat rod models. A SWNT is a thin hollow cylinder, with diameter of the order of 1 nm and length possibly as large as 1[MICRO SIGN]m. Its wall is composed of a single layer of carbon atoms with an estimated thickness around 0.335…
Two vibrating bubbles submerged in a fluid influence each others' dynamics via sound waves in the fluid. Due to finite sound speed, there is a delay between one bubble's oscillation and the other's. This scenario is treated in the context of coupled nonlinear oscillators with a delay coupling term. It has previously b…
This thesis presents a new potentially low-cost massively parallel electron lithography system, which we term as RadioIsotope-powered Parallel Electron Lithography (RIPEL). We demonstrate its applications to solar cells, thermo-opto-mechanical excitation, inertial sensors, micro-speakers, ultrasonic mechanical DNA sen…
Poly(3-hydroxybutyrate) (PHB) is a biodegradable and biocompatible polymer produced by many bacteria as a stored carbon source. Recent reviews have recently recognized PHB granules as a biomaterial that can be functionalized for use in various biomedical applications. The studies in this dissertation describe a novel…
The resolving equations for the calculation of the stability of polymer compressed rods with the creep using Galerkin method are obtained. The problem is solved in the case of a simply supported pivotally-rod having an initial bending in the plane of the lower stiffness, and in the case of off-center application of fo…
Atomistic simulations can illuminate detailed mechanisms of brittle and ductile fracture and plasticity. However, there are many limitations to these simulations like short timescales, small spatial scales, and limitations of the discretization. Using molecular dynamics (MD) and multiscale methods, adaptations can be…