Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Two new benzoxazole or benzothiazole‐containing diimide‐dicarboxylic acid monomers, such as 2‐[3,5‐bis( N ‐trimellitimidoyl)phenyl]benzoxazole ( 2 o ) or 2‐[3,5‐bis( N ‐trimellitimidoyl)phenyl]benzothiazole ( 2 s ) were synthesized from the condensation reaction between 3,5‐diaminobenzoic acid and 2‐aminophen…
We present a study on the dependence of atomic mismatch between graphene sheets in graphite and the misorientation of the resulting superlattice domains. We demonstrate, through measurements of the atomic orientation of the top sheet and the angular misorientation between superlattice domains, that it is possible to c…
Two techniques of spray pyrolysis, namely, electrostatic and pneumatic spray deposition, were used to deposit samaria-doped ceria (SDC) electrolyte and lanthanum strontium cobalt ferrite (LSCF) cathode on cermet or metal supported anodes for solid oxide fuel cells (SOFCs) operated at reduced temperature. The depositio…
By using four-terminal configurations, we investigated the dependence of longitudinal and diagonal resistances of a graphene $p\text{\ensuremath{-}}n$ interface on the quantum-Hall edge-state equilibration position. The resistance of a $p\text{\ensuremath{-}}n$ device in our four-terminal scheme is asymmetric with res…
The phase transitions, magnetocaloric effect and magnetoresistance in Ni 43 Mn 46- x Co x Sn 11 ( x =0–5) ferromagnetic shape memory alloys were investigated. With the increase of Co concentration, the temperatures of martensitic transformation and magnetic transition in austenitic phase increase rapidly, while the ma…
Single-crystalline platinum nanocubes with porous morphology were synthesized for the first time by using ethylene glycol, HCl, and polyvinylpyrrolidone as the reducing agents of H2PtCl6. The morphology and size distribution of the Pt particles formed were studied with a high-resolution transmission electron microscop…
This study is related to the preparation of silicon oxycarbide monoliths comprising a hierarchical network build-up from the pyrolysis of monolithic organosilica gels. A novel glycol-modified 1,3,5-trisilacyclohexane-carbosilane “[Si(OCH 2 CH 2 OH) 2 CH 2 ] 3 ” was processed via a polymerization-induced phase separati…
Spatial coordinate transformation is a suitable tool for the design of complex electromagnetic structures. In this paper, we define three spatial coordinate transformations which show the possibility of designing a taper between two different waveguides. A parametric study is presented for the three transformations an…
Silicon carbide nanotubes (SiCNTs) are new materials with excellent properties, such as high thermal stability and mechanical strength, which are much improved over those of their carboneous counterparts, namely, carbon nanotubes (CNTs). Gas separation processes at high temperatures and pressures may be improved by de…
Epitaxial graphene is formed on vicinal SiC(0001) surfaces via high temperature annealing in vacuum. Steps act as a significant ``kicker'' of graphene nucleation to feed C atoms. At elevated temperatures, graphene growth is controlled by the decomposition of Si-C bonds at step edges, Si desorption, and C diffusion on…
Exciton spin dynamics in quasispherical CdS quantum dots is studied in detail experimentally and theoretically. Exciton states are calculated using the six-band $\mathbf{k}\ensuremath{\cdot}\mathbf{p}$ Hamiltonian. It is shown that for various sets of Luttinger parameters, when the wurtzite lattice crystal-field split…
We obtain the noncollinear ground states of a triangular-lattice antiferromagnet with exchange interactions up to third nearest neighbors as a function of the single-ion anisotropy $D$. At a critical value of $D$, the collinear $\ensuremath{\uparrow}\ensuremath{\uparrow}\ensuremath{\downarrow}\ensuremath{\downarrow}$…
We probe the molecular-level behavior of the Family 1 carbohydrate-binding module (CBM) from a commonly studied fungal cellulase, the Family 7 cellobiohydrolase (Cel7A) from Trichoderma reesei, on the hydrophobic face of crystalline cellulose. With a fully atomistic model, we predict that the CBM alone exhibits region…
Density functional calculations of palladium absorbed on graphene have been performed to study the first stages of Pd coating and/or Pd cluster formation on the graphene surface, a question of great relevance to many experiments. We have found that palladium atoms deposited on graphene have a strong tendency to form c…
$^{31}\text{P}$ and $^{75}\text{A}\text{s}$ NMR measurements were performed in superconducting ${\text{BaFe}}_{2}{({\text{As}}_{0.67}{\text{P}}_{0.33})}_{2}$ with ${T}_{c}=30\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The nuclear-spin-lattice relaxation rate ${T\phantom{\rule{0.1em}{0ex}}}_{1}^{\ensuremath{-}1}$ and the K…
We present an ab-initio density function theory to investigate the electronic and magnetic structures of the bilayer graphene with intercalated atoms C, N, and O. The intercalated atom although initially positioned at the middle site of the bilayer interval will finally be adsorbed to one graphene layer. Both N and O…
We report a simple method for the synthesis of ultra-fine Eu(3+)-doped yttria (Y(2)O(3)) nanophosphors with an average diameter of approximately 5 nm for development of a transparent colloid that could be used as a luminescent security ink. This has been achieved by suitably substituting Eu(3+) ions at the favorable C…
Chitosan is a natural polymer composed of randomly distributed β-(1-4)-linked D-glucosamine (deacetylated unit) and Nacetyl- D-glucosamine (acetylated unit). It has been described as a non-toxic, biodegradable and biocompatible polymer with very interesting biological properties, such as permeation-enhancing and mucoa…
Angular correlations in dense solutions and melts of flexible polymer chains are investigated with respect to the distance r between the bonds by comparing quantitative predictions of perturbation calculations with numerical data obtained by Monte Carlo simulation of the bond-fluctuation model. We consider both monodi…
Abstract This article is aimed at the investigation of electrical aging of polyesterimide under AC voltage using Weibull statistical analysis. It's shown that the time to breakdown characteristic ( V – t ) of polyesterimide includes two zones (segments of straight line). The first zone characterizes a statistical disp…