Materials Literature
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The phase-field model was extended to simulate spinodal decomposition under the temperature gradient and external elastic strain in binary alloys, and the variations of phase decomposition temperature and precipitate morphology were investigated. In the system with a temperature gradient, the phase decomposition happe…
We present a study of the derivatives of current-voltage $I(V)$ characteristics of point contacts (PCs) based on Ba${}_{1\ensuremath{-}x}$Na${}_{x}$Fe${}_{2}$As${}_{2}$ ($x=0.25$) in the normal and superconducting states. The detailed analysis of $dV/dI(V)$ data (also given in Appendix A) shows that the thermal regime…
We propose a simple theoretical model which explains the formation of dipolar two- (2D) and three-dimensional (3D) colloidal structures in nematic liquid crystals. The colloidal particles are treated as effective hard spheres interacting via their elastic dipole, quadrupole, and octopole moments. It is shown that the…
Time-resolved photoluminescence (PL) spectra of Ce-doped Gd 3 Al 2 Ga 3 O 12 (Ce:GAGG) crystal have been measured at various temperatures under Ce 3+ 4f → 5d excitation. All time-resolved PL spectra show only a Ce 3+ 5d → 4f band around 2.3 eV. Decay curves of this band consist of a fast and slow components. The tempe…
We report electrical features and magnetoresistance behavior of the oxygen deficient La0.4Ca0.6MnO3-δ perovskites (δ = 0, 0.15, and 0.2). These samples will be referred to as S0, S15, and S20, respectively. The dependence of electrical transport on temperature and magnetic field is systematically investigated between…
Graphene transfer is a critical process in the journey from CVD-grown graphene to device application. The current transfer techniques use a chemical-etching method to oxidize the metal catalyst, which is heavily time-consuming and involves a high material cost. In this study, a highly efficient symmetrical bi-electrod…
A simple, low-cost and scalable route to substrate-supported nanowire growth is reported based on catalyzed oxidation. The process shares common features with popular catalyzed nanowire growth techniques such as vapor-liquid-solid (VLS), vapor-solid-solid (VSS), or vapor-quasi-solid (VQS) that use catalyst nanoparticl…
A correction scheme for thermal conductivity measurement using the comparative cut-bar technique based on 3D numerical simulation, Xing, Changhu, Folsom, Charles, Jensen, Colby, Ban, Heng, Marshall, Douglas W
We have measured the surface phonon dispersion curves on the hydrogen-terminated Si(110)-(1×1) surface with the two-dimensional space group of p2mg along the two highly symmetric and rectangular directions of \documentclass[12pt]{minimal}\begin{document}$\overline{\Gamma \rm X}$\end{document}ΓX¯ and \documentclass[12p…
We report a high sensitivity to oxygen vacancy formation as well as the temperature dependence of anisotropic optical properties of a nanocrystalline ${\text{V}}_{2}$${\text{O}}_{5}$ thin film. Spectroscopic ellipsometry data show that the film has a uniaxial optical anisotropy due to a highly ordered nanocrystalline…
In an effort to provide insight into the molecular origins of the (2)H double quantum filtered (DQF) NMR signal observed in connective tissue, specifically spinal disc tissue, (2)H multiple quantum filtered (MQF) NMR spectroscopy is used to study the structure and dynamics of D2O in collagen as a function of hydration…
We report Car-Parrinello molecular dynamics simulations of the oxidation of ligand-protected aluminum clusters that form a prototypical cluster-assembled material. These clusters contain a small aluminum core surrounded by a monolayer of organic ligand. The aromatic cyclopentadienyl ligands form a strong bond with sur…
Non‐destructive techniques are suitable alternatives for characterization of composites. The aim of this study is to analyze the composites of epoxy resin (ER)/marble waste powder (MWP) by ultrasonic method. The effects of marble powder, coagulant type, and dosage on the ultrasonic properties of ER/MWP composites were…
Organic–inorganic aluminosilicate hybrids are an attractive new class of materials that add organic functionalities to conventional properties of solid inorganic catalysts. ECS-17, a novel crystalline hybrid, was synthesized using 1,4-bis-(triethoxysilyl)-benzene as the sole silicon source. Its structure was solved by…
Nanostructuring is a key approach in enhancing the performance of electrochemical devices. In this work, nanostructuring is achieved by the electrodeposition of nickel hydroxide nanowire arrays, with both open-ended and close-ended structures, through anodized aluminium oxide (AAO) templates that are directly fabricat…
To simulate iron consumption in soils, iron leaching from silicate minerals due to three heterotrophic bacterial strains and a chemical treatment was studied using hybrid silica gel (HSG) doped with two phyllosilicates, nontronite (NAu-2) or low-iron-content montmorillonite (SWy-2). HSG methodology, a novel way of sep…
Virtual move Monte Carlo is a Monte Carlo (MC) cluster algorithm forming clusters via local energy gradients and approximating the collective kinetic or dynamic motion of attractive colloidal particles. We carefully describe, analyze, and test the algorithm. To formally validate the algorithm through highlighting its…
North Carolina State University Theses Nuclear Engineering.
Abstract The poly[(butylene succinate)‐ co ‐adipate] (PBSA) nanocomposites (PBSANCs) with five different loadings of organoclay were prepared by melt‐blending. The morphological investigation revealed that the degree of dispersion of silicate layers in the PBSANCs changes from well‐delaminated to intercalated and subs…
ABSTRACT Rice husk (RH) and linear medium density polyethylene (LMDPE) were used along with maleic anhydride grafted polyethylene (MAPE) to study the effects of component composition on the mechanical properties of the composites. Ten different blends along with four replicated blends were prepared with different sele…