Materials Literature
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The correlation between ionic radii and the lattice constants of cubic/pseudocubic perovskites is re‐examined and a new empirical formula for the relationship is derived. The average absolute error in the predicted lattice constants of perovskites thus derived is expected to be about 0.60%. Discrepancies between measu…
Preferential oxidation (PROX) of CO is an important practical process to purify H2 for use in polymer electrolyte fuel cells. Although many supported noble metal catalysts have been reported so far, their catalytic performances remain insufficient for operation at low temperature. We found that Pt nanoparticles in mes…
Fluorescent core−shell CdTe@SiO 2 particles with controllable particle sizes were prepared via a reverse microemulsion method by hydrolyzing tetraethyl orthosilicate within microwater droplets. Aqueous CdTe nanocrystals and CdS nanocrystals stabilized by different types of thiol molecules were prepared for elucidating…
SrMoO4 was studied under compression up to 25 GPa by angle-dispersive x-ray diffraction. A phase transition was observed from the scheelite-structured ambient phase to a monoclinic fergusonite phase at 12.2(9) GPa with cell parameters a = 5.265(9) A, b = 11.191(9) A, c = 5.195 (5) A, and beta = 90.9, Z = 4 at 13.1 GPa…
We report on magnetic resonance studies within the magnetically ordered phase of the quasi-one-dimensional antiferromagnet $\mathrm{Li}\mathrm{Cu}\mathrm{V}{\mathrm{O}}_{4}$. Our studies reveal a spin reorientational transition at a magnetic field ${H}_{c1}\ensuremath{\approx}25\phantom{\rule{0.3em}{0ex}}\mathrm{kOe}$…
It is shown that a graphene ribbon, a ballistic strip of carbon monolayer, may serve as a quantum wire whose electronic properties can be continuously and reversibly controlled by an externally applied transverse voltage. The electron bands of armchair-edge ribbons undergo dramatic transformations: The Fermi surface f…
Popular density functionals for the exchange-correlation energy typically fail to reproduce the degeneracy of different ground states of open-shell atoms. As a remedy, functionals which explicitly depend on the current density have been suggested. We present an analysis of this problem by investigating functionals tha…
We present new analytical calculations of the spatial dependence of the stray field of a bistable magnetic wire from the magnetization profile of the wire. Contributions from the outer shell and from the wire ends are neglected. The results qualitatively agree with experimental data, taken from literature.
The compound H3N.BH3 (1) is currently attracting considerable attention as a potential hydrogen storage material. Group 9 catalysts which rapidly and conveniently hydrolyze aqueous 1 in air are described. When treated with 1 mol % [{Rh(mu-Cl)(1,5-cod)}2] (cod=cyclooctadiene) in air, aqueous 1 undergoes rapid hydrolysi…
Capsules of micron and sub-micron dimensions are abundant in nature in the form of bacterial or viral capsids and play an increasing role in modern technology for encapsulation and release of agents. The capsules' mechanical properties are of great importance in this context not only for stability but as well for tran…
In this work, electrically controlled fully reversible wetting-dewetting transitions on superhydrophobic nanostructured surfaces have been demonstrated. Droplet behavior can be reversibly switched between the superhydrophobic Cassie-Baxter state and the hydrophilic Wenzel state by the application of electrical voltage…
We present a scanning-tunneling microscopy (STM) study of a gently graphitized $6H\text{\ensuremath{-}}\mathrm{Si}\mathrm{C}(0001)$ surface in ultrahigh vacuum. From an analysis of atomic scale images, we identify two different kinds of terraces, which we attribute to mono- and bilayer graphene capping a C-rich interf…
From an experimental point of view, room-temperature ferroelectricity in $\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}$ is raising many questions. Electric measurements made a long time ago on solid solutions of $\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}$ with $\mathrm{Pb}(\mathrm{Ti},\mathrm{Zr}){\mathrm{O}}_{3}$ indicate tha…
For the past few decades, there has been a considerable research interest in the area of drug delivery using particulate delivery systems as carriers for small and large molecules. Particulate systems like nanoparticles have been used as a physical approach to alter and improve the pharmacokinetic and pharmacodynamic…
라디오파 마그네트론 스퍼터링 방법으로 유리 기판 위에 Al 도핑된 ZnO (AZO) 박막을 성장시켰다. 증착시 스퍼터링 가스로 사용하는 산소 유량비의 변화에 따른 AZO 박막의 특성을 X-선 회절법, 원자 주사 현미경, 홀 효과 측정법으로 조사하였다. 증착 온도 <TEX>$400^{\circ}C$</TEX>에서 산소 유량비 0%로 증착된 AZO 박막은 가장 큰 c-축 우선 배향성과 최저의 비저항값 <TEX>$6.9{\times}10^{-4}{\Omega}cm$</TEX>을 나타내었다. 산소 유량비가 증가함에 따라 ZnO (002)면의 회절 피크의 세기는 실질적으로…
In this letter, the authors propose an optical configuration for the reflective liquid crystal (LC) cell with single polarizer, which can show the wideband property for high contrast in oblique incidence. The cell consists of a biaxial, a half-wave retarder, a quarter-wave LC cell, and a positive C plate in addition t…
A photodetector, comprising a layer of silicon nanocrystals that is sandwiched between two electrodes, is proposed and demonstrated in a photosensing application on low-temperature polysilicon panels. Laser annealing of silicon-rich oxide films can form nanocrystals that respond optimally to a certain absorption spect…
The frictional wear characteristics of Ti-29Nb-13Ta-4.6Zr alloy subjected to solution treatment (referred to as TNTZ(ST)) and aged at 598, 673 and 723 K after solution treatment (referred to as TNTZ(598K), TNTZ(673K) and TNTZ(723K), respectively) were investigated in air and a simulated body environment (Ringer's solu…
Abstract With a small amount of isocyanate‐terminated polysulfide (NCO‐PSF‐NCO) as additive, the commercial polysulfide‐based sealant had significant improvement in mechanical properties. The test results showed that 5% of NCO‐PSF‐NCO could help to rise 50% in the tensile strength and 27% in the ultimate elongation of…
Abstract The synthesis and characterization of two symmetrical Fe II complexes, [FeL B4 (NCS) 2 ], 1 , and [FeL B5 (NCS) 2 ], 2 {L B x = N , N ′‐bis[(2‐ N ‐R‐imidazol‐1‐yl)methylene]‐2,2‐dimethylpropane‐1,3‐diamine ligands; 1 : x = 4, R = H; 2 : x = 5, R = Me} are reported. Whereas the tetradentate ligand L B4 is plan…