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。
Photo‒fabrication of surface‒wrinkled hybrid organic‒inorganic composite films containing TiO2 nanoparticles stabilized with CTA+ and PVP allows the preparation of tunable hierarchical structures with environmentally responsive properties. With changes in relative humidity, the film swells by absorbing water and smoot…
A model for metal spherical particle formation is proposed, guided by optical kinetic data of monodisperse metal colloid synthesis. The dynamic optical response of these systems is characterized by broad bands, making their analysis difficult to interpret in terms of particles sizes. To overcome this problem, the data…
The multilevel stepped-wall and rectangular observation chambers are designed to study the multipoint ignition process and the combustion stability control mechanism of the bulk-loaded liquid propellant gun. The expansion process and interaction of high-speed twin combustion-gas jets in liquid are studied by means of…
The coordination polymer {[Cu 3 (hbpdc)(OH) 2 (H 2 O)]·2H 2 O} n ( 1, hbpdc = 3,3′-dihydroxy-2,2′-bipyridine-6,6′-dicarboxylic anion) was prepared under hydrothermal conditions. Single-crystal X-ray diffraction revealed that complex 1 features a highly ordered 3D nanoporous structure encapsulating a zigzag water chain…
Vanadium phosphorus oxide (VPO) catalysts synthesized via hydrothermal method were introduced with some different dopants, Cr, Ni, Fe, and Mn during the preparation of the precursors, VOHPO4 · 0.5H2O. All modified precursors were subsequently transformed under reaction conditions to give the active phase, (VO)2P2O7. S…
The lithium salt of 2,6-difluoro-2'-sulfobenzophenone was conveniently synthesized in one-pot by reacting 2,6-difluorophenyllithium with 2-sulfobenzoic acid cyclic anhydride in THF at -70 °C whereafter the product crystallized out of solution. A poly(arylene ether) and a poly(arylene sulfide) were prepared by polycond…
The influence of annular aperture parameters on the optical transmission through arrays of coaxial apertures in a metal film on high refractive index substrates has been investigated experimentally and numerically. It is shown that the transmission resonances are related to plasmonic crystal effects rather than freque…
We consider the problem of temperature chaos in mean-field spin-glass models defined on random lattices with finite connectivity. By means of an expansion in the order parameter we show that these models display a much stronger chaos effect than the fully connected Sherrington–Kirkpatrick model with the exception of t…
The nearest-neighbor antisite pair defects in 4H-SiC, 6H-SiC, and 3C-SiC single crystals have been identified using electron paramagnetic resonance spectroscopy in combination with a nonperturbative ab initio scheme for the electronic $g$ tensor. Based on the theoretical predictions, the positively charged defect has…
Abstract A novel method is described to functionalize nanofibers to form a nanocomposite with core/shell particles in order to control protein release. The nanocomposite is produced by electrically neutralizing negatively charged poly(lactic acid) nanofibers with positively charged poly[(lactic acid)‐co‐(glycolic acid…
A crystallographic study and theoretical analysis of the Si/Ga site preferences in the Gd(5)Ga(x)Si(4-x) series is presented. Gd(5)Ga(x)Si(4-x) adopt the orthorhombic Gd(5)Si(4)-type structure (space group Pnma, Z = 4) with a maximum Ga content near x = 1.00, as determined by single crystal and powder X-ray diffractio…
Herein we report the synthesis and characterization of a transporter 9 for N-acetylated amino acids. Transporter 9 is a conjugate of a guanidiniocarbonyl pyrrole cation, one of the most efficient carboxylate binding motifs reported so far, and a hydrophobic tris(dodecylbenzyl) group, which ensures solubility in organi…
InGaN-based light-emitting diodes (LEDs) were grown and fabricated on nanoscale patterned Si (111) substrates (NPSi). Using anodized aluminum oxide as the etch mask, the NPSi was prepared with an average nanopore diameter of 150 nm and interpore distance of 120 nm. LEDs grown on NPSi exhibit relaxed tensile stress rel…
We describe a simple scheme to construct a low-energy effective Hamiltonian ${H}_{\text{eff}}$ for highly correlated systems containing nonmetals such as O, P, or As (O in what follows) and a transition-metal $(M)$ as the active part in the electronic structure, eliminating the O degrees of freedom from a starting Ham…
We have investigated the process of rehydroxylation of pyrophyllite as a limiting factor to the dehydroxylation upon thermal treatment. Car-Parrinello molecular dynamics simulations based on density functional theory have been used along with the metadynamics algorithm. Two possible rehydroxylation mechanisms reaction…
We present a metal/semiconductor beam steering device for use in the mid-infrared wavelength range. We demonstrate how changing the frequency of the incident light results in a smoothly varying shift in the angular distribution of the transmitted beam, and we present an analysis of the beam profile for a number of dif…
Complementary NAND and NOR gates composed of p-channel HgTe-nanocrystal (NC) films and n-channel HgSe-NC films were constructed on back-gate patterned plastic substrates. The NAND gate was made of two HgTe-p-channel thin film transistors (TFTs) in parallel and two HgSe-n-channel TFTs in series. The NOR gate was built…
Abstract We investigated the electroluminescence (EL) properties of europium (Eu)‐doped GaN‐based red light‐emitting diode (LED). Under current injection, the energy transfer from the GaN host material to Eu3+ ions successfully occurred and the red emission from Eu3+ ions was observed with naked eyes under normal ligh…
We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy to directly study the large superconducting (SC) gap anisotropy of ${\text{YNi}}_{2}{\text{B}}_{2}\text{C}$. We succeed in measuring momentum $(k)$ dependence of SC gap for individual Fermi surface (FS) sheets, which demonstrates complexi…
Abstract In conventional nitride‐based light emitting diodes, huge internal electric fields lead to a reduced overlap of electron and hole wave functions in the active GaInN quantum wells as a consequence of the piezoelectricity of these polar materials. In order to minimize these internal fields while still maintaini…