Materials Literature
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(Abridged, full abstract available in the text) The main goal of the study presented in this thesis was to perform in-situ investigations on deformation structures in plastically deformed polycrystalline copper at low degrees (<5%) of tensile deformation. Copper is taken as a model system for pure fcc metals. A novel…
Silver gets fat and thin: Ag nanoparticles photocatalytically deposited on rutile TiO2 single crystals exhibit multicolor photochromism. Under monochromatic visible light, particles resonant with the light are photoelectrochemically dissolved, and re-deposited on the TiO2 substrate or non-resonant particles. These siz…
We present a detailed treatment of dissipative quantum transport in carbon-nanotube field-effect transistors (CNT-FETs) using the nonequilibrium Green's function formalism. The effect of phonon scattering on the device characteristics of CNT-FETs is explored using extensive numerical simulation. Both intra- and interv…
A conducting scaffold of carbon nanotube architecture has been used to anchor ZnO nanoparticles. The interaction between functionalized carbon nanotubes (f-CNT) and photoexcited ZnO nanoparticles results in direct electron transfer between the two systems. The role of f-CNT in facilitating the charge collection and ch…
Three different special quasirandom structures (SQS) of the substitutional hcp $A_{1-x}B_x$ binary random solutions ($x=0.25$, 0.5, and 0.75) are presented. These structures are able to mimic the most important pair and multi-site correlation functions corresponding to perfectly random hcp solutions at those compositi…
The tetragonal layered compounds TbTiGe and ErTiGe order antiferromagnetically at 276 K and 39 K, respectively. Partial substitution of Mo for Ti in these two compounds modifies the magnetic interactions giving rise to a ferromagnetic ground state which results in an enhanced magnetocaloric effect. The magnetic entrop…
Hydrogenography optically monitors hydrogen ab- and desorption simultaneously on thousands of alloy compositions under exactly the same experimental conditions. In this way the hydride-formation enthalpy map of the Mg–Ni–Ti–H system is determined from a compositional gradient thin film. The figure shows that the regio…
Structural phase stability, electronic structure, optical properties, and high-pressure behavior of polytypes of ${\mathrm{In}}_{2}{\mathrm{O}}_{3}$ in three space group symmetries $I{2}_{1}3$, $Ia\overline{3}$, and $R\overline{3}$ are studied by first-principles density-functional calculations. From structural optimi…
Elastomeric networks are increasingly being investigated for a variety of biomedical applications including drug delivery and tissue engineering. However, in some cases, their preparation requires the use of harsh processing conditions (e.g., high temperature), which limits their biomedical application. Herein, we dem…
Processable composites of single-walled carbon nanotubes (SWNTs) with soluble cross-linked polyurethane (SCPU) were prepared at various loadings of SWNTs (0−25 wt %), and they exhibited strong microwave absorption in the microwave range of 2−18 GHz. For example, 5 wt % loading SWNTs/SCPU composite has a strong absorbi…
A systematic study of the zeta (ζ)-potential distribution of surfactant-wrapped individual single-walled carbon nanotubes (SWNTs) dissolved in water is presented here. The surface charge on the SWNT micelles, as measured by the ζ-potential, has implications for the stability of the dispersions and for the electrophore…
Abstract Miocene volcanic rocks from northeast of Lopburi, Thailand, include a suite of highly potassic (<6.3% K 2 O) perlitic rhyolites that are similar chemically to rhyolites from Sardinia (which are also perlitic) and Vulcano. Electron microprobe analysis using a defocussed beam has shown that glass composition…
Hydrophobic compounds of smectic liquid crystals are spontaneously spread on a liquid surface to form softly-condensed monomolecular films. The constituent molecules are coherently tilted from the surface normal when they form smectic-C phase in the bulk state, while the molecules are aligned perpendicular to the surf…
In order to explore the utilization of persimmon juice-dyed T-shirts under vigorous sports activities, persimmon juice-dyed and undyed cotton knitted T-shirts were compared in terms of comfort-related physical properties such as moisture transport characteristics and wear performances including sweat amount, moisture…
Polylactide (PLA) filaments produced by melt spin-drawing in different conditions (draw ratio, temperature of the draw roll) have been studied to demonstrate the influence of the process conditions on the tensile properties of the PLA filaments. Draw ratio varies from 2 to 3.5 and temperature of the draw roll from 80°…
Abstract A new hexanuclear copper(II) sandwich complex based on two 12‐membered macrocyclic methylsiloxanolate ligands, [Cu 6 {(MeSiO 2 ) 6 } 2 ] · 6DMF, was synthesized and characterized by single‐crystal X‐ray diffraction analysis and magnetic measurements. The cluster compound crystallizes in the monoclinic system,…
We demonstrate a simple method for growing organic crystal fiber bundles as long as centimeters by controlling the shape and dimension of the evaporation channel of the chloroform solution of N,N'-bis(1-ethylpropyl)-3,4,9,10-perylenebis(dicarboximide) (EPPTC). The capillary effect induces a thin solution film (capilla…
The question of the statistical accuracy of EBSD data for global texture calculation was re-explored on the basis of a very large grain population (83 000 grains measured on a recrystallized low-alloyed Zr sheet). Previous works aimed mainly at identifying and quantifying the main texture components and were based on…
The vibrational configuration interaction method used to obtain static vibrational (hyper)polarizabilities is extended to dynamic nonlinear optical properties in the infinite optical frequency approximation. Illustrative calculations are carried out on H(2)O and NH(3). The former molecule is weakly anharmonic while th…
A practical approach for adsorption modeling of heterogeneity of single-walled carbon nanotube (SWNT) bundles has been developed. The method integrates experimental analysis with grand canonical Monte Carlo (GCMC) simulation of a small probe molecule, such as nitrogen at 77 K. Using this method, it is possible for one…