Materials Literature
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β-Ga 2 O 3 one-dimensional (1D) nanostructures including nanowires, nanoribbons and nanosheets were synthesized via a combined carbon thermal reduction and chemical vapor deposition (CVD) approach. All of these nanostructures consist of single-crystalline monoclinic structure, which has been confirmed via high-resolut…
Protein crystallization is still a major bottleneck in structural biology. As the current methodology of protein crystallization is a type of screening, it is usually difficult to crystallize important target proteins. It was thought that hetero-epitaxic growth from the surface of a mineral crystal acting as a nuclean…
Using the photoluminescence from GeGaSe:Er to pump GeGaS:Er, we examine the efficiency of light trapping. By measuring the photoluminescence decay time in powdered materials with varying particle size, we are able to exclude the influence of light trapping and to pinpoint the effect of self-quenching. The critical con…
Passivation of stainless steel implants is a common procedure used to increase their biocompatibility. The results presented in this work demonstrate that the electrochemical cyclic potentiodynamic polarization (CPP) of a biomedical grade 316LVM stainless steel surface is a very efficient passivation method that can b…
Organic gelator: Diacetyl- and dinaphthyl-terminated hydrazide-based oligomers displayed gelation ability in apolar solvents due to hydrogen bonding and/or π–π stacking interactions, which promoted aggregation along one dimension. Their gels were solvent polarity sensitive. Because of complementary hydrogen-bonding si…
The room temperature out-of-plane magnetization of epitaxial thin films of ${\mathrm{La}}_{0.67}{\mathrm{Sr}}_{0.33}\mathrm{Mn}{\mathrm{O}}_{3}$ on $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ (001) has been investigated with magnetic force microscopy, using magnetic tips with very small coercivity, relative to the film.…
Molecular dynamics simulations are performed to study the structure and dynamical heterogeneity in the liquid and glass states of Al using a frequently employed embedded atom potential. While the pair correlation function of the glass and liquid states displays only minor differences, the icosahedral short-range order…
The geometries, stabilities, electronic properties, and magnetism of FeB(n) clusters up to n=10 are systematically studied with density functional theory. We find that our optimized structures of FeB(2), FeB(3), FeB(4), and FeB(5) clusters are more stable than those proposed in previous literature. The results show th…
We have made reliable measurements of the sound velocity delta v/v(0) and internal friction Q(-1) in vitreous silica at 1.03, 3.74, and 14.0 kHz between 1 mK and 0.5 K. In contrast with earlier studies that did not span as wide a temperature and frequency range, our measurements of Q(-1) reveal a crossover (as T decre…
Abstract This paper describes the fabrication process of thermoelectric microconverters, based on n-type bismuth telluride (Bi2Te3) and p-type antimony telluride (Sb2Te3) thin films. Materials are fabricated by thermal co-evaporation with thermoelectric properties comparable to those reported for the same materials in…
Detailed scanning tunneling microscopy measurements reveal the complex interaction of Au with a h-BN nanomesh on Ru(0001). The h-BN overlayer on Ru(0001) consists essentially of a hexagonal lattice of 2 nm wide pores with an in-plane lattice constant of 3.25 nm. The h-BN nanomesh can be regarded as a highly regular ne…
A 15N-labeled nitroxide was incarcerated into an octa acid nanocapsule, which was confirmed by 1H NMR and EPR spectroscopy. Electron paramagnetic interaction between the 15N-labeled incarcerated nitroxide and a 14N-labeled free nitroxide in the external aqueous solution was observed by EPR spectroscopy. The observatio…
A new type of thermotropic liquid-crystalline photosensitive supramolecule was fabricated by ionic self-assembly of polyelectrolyte and functional unit azobenzene ionic liquid crystal (azo-ILC). It was found that the thermal and phase behaviors can be modulated by changing of the spacer length (4, 6, or 12 methylene u…
Dimers are the smallest chemical objects that show magnetic anisotropy. We focus on 3d and 4d transition metal dimers that have magnetic ground states in most cases. Some of these magnetic dimers have a considerable barrier against re-orientation of their magnetization, the so-called magnetic anisotropy energy, MAE. T…
We show by resolving single-particle dynamics as a function of contact number that dynamical heterogeneity in depletion colloidal gels must have more than one structural origin. Although the magnitude of dynamical heterogeneity of weak gels with cluster structure and strong gels with string structure is similar, the d…
Ab initio calculations are performed to study the CO oxidation on six endohedral gold-cage clusters (W@Au 12, Nb@Au 13, Zr@Au 14, Sc@Au 15, Ca@Au 16, and Na@Au 17 ). The calculations suggest that three clusters (Nb@Au 13, Zr@Au 14, and Sc@Au 15 ) can be very effective nanocatalysts. The reaction energy barriers are lo…
A new anisotropic size-broadening model based on a spherical-harmonics representation allowing determination of both volume- and area-averaged apparent crystallites and convenient for implementation into Rietveld programs is described. The model effectiveness is demonstrated on a ZnO powder pattern exhibiting strongly…
Electrospinning is a valuable technique to fabricate fibrous scaffolds for tissue engineering. The typical nonwoven architecture allows cell adhesion and proliferation, and supports diffusion of nutrients and waste products. Poly(epsilon-caprolactone) (PCL) electrospun membranes were produced starting from 14% w/v sol…
An efficient microwave-assisted reflux route has been used to synthesize layered nanostructures of cobalt hydrotalcite like compound spheres. Scanning electron microscopy images showed that these structures are self-assemblies of the nanosheets with uniform 5-nm thickness. The layered cobalt hydrotalcite like compound…
Layered HNbMoO6 was found to function as a strong solid acid catalyst, exceeding the activity of zeolites and ion-exchange resins for Friedel-Crafts alkylation. HNbMoO6 also exhibited high catalytic activity for esterification of hydrocarboxylic acid and hydration. The catalytic performance of layered HNbMoO6 is attri…