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。
Subnanometer Pd clusters stabilized within micelles of random copolymers were formed by direct immobilization of Pd(0) via ligand exchange. The clusters were estimated to contain approximately seven Pd atoms on average (cluster diameter approximately 0.7 nm). Several Pd-containing micelle morphologies could be obtaine…
Abstract The coupling efficiency of seven coupling agents in wood–polymer composites (WPC) was investigated in this study. The improvement on the interfacial bonding strength, flexural modulus, and other mechanical properties of the resultant wood fiber/high‐density polyethylene (HDPE) composites was mainly related to…
Metal membranes play a vital role in hydrogen purification. Defect-free membranes can exhibit effectively infinite selectivity but must also provide high fluxes, resistance to poisoning, long operational lifetimes, and low cost. Alloying offers one route to improve on membranes based on pure metals such as palladium.…
We investigate the magnetic properties of epitaxial GaN:Gd layers as a function of the external magnetic field and temperature. An unprecedented magnetic moment is observed in this diluted magnetic semiconductor. The average value of the moment per Gd atom is found to be as high as $4000\text{ }\text{ }{\ensuremath{\m…
Research on fluorescent semiconductor nanocrystals (also known as quantum dots or qdots) has evolved over the past two decades from electronic materials science to biological applications. We review current approaches to the synthesis, solubilization, and functionalization of qdots and their applications to cell and a…
In order to find a way to achieve large magnetoresistance in thin films of Sr2FeMoO6, structural, magnetic, and transport properties were systematically investigated for the films grown on SrTiO3 substrates under different conditions. Crystallinity, morphology, resistivity, and magnetization of the films depended sens…
The electron field emission properties of the nanodiamond films were examined using scanning tunneling microscopic (STM) technique. Current image tunneling spectroscopic measurements reveal the direct dependence of electron tunneling/field emission behavior of the films on the proportion of grain boundaries present. L…
The phenomenon of photon tunneling, which depends on evanescent waves for radiative transfer, has important applications in microscale energy conversion devices and near-field optical microscopy. In recent years, there has been a surge of interest in the so-called negative index materials (NIMs), which have simultaneo…
The indium(III)-substituted polyanions [In 3 Cl 2 ( B-α- PW 9 O 34 ) 2 ] 11– ( 1 ), [In 3 Cl 2 (P 2 W 15 O 56 ) 2 ] 17– ( 2 ), [In 4 (H 2 O) 10 ( β- AsW 9 O 32 OH) 2 ] 4– ( 3 ) and [In 4 (H 2 O) 10 ( β- SbW 9 O 33 ) 2 ] 6– ( 4 ) have been synthesized and characterized in the solid state by IR and elemental analysis an…
Abstract Self-assembly of dendrons allows a new approach for size control of bimetallic Pd–Pt nanoparticles, which affords reusable dendritic nanoreactors for selective hydrogenation of dienes and alkynes to monoenes in thermomorphic systems.
The experimental results of the susceptibility, specific heat, magnetization, and electron spin resonance of $\mathrm{Cu}{({\mathrm{H}}_{2}\mathrm{O})}_{2}({\mathrm{C}}_{2}{\mathrm{H}}_{8}{\mathrm{N}}_{2})\mathrm{S}{\mathrm{O}}_{4}$ are reported. Despite the triangular arrangement of chemical bonds, the system is iden…
An S-bridged RhIII2PtII2 tetranuclear complex having two nonbridging thiolato groups, [{Pt(NH3)2}2{Rh(aet)3}2]4+ ([1]4+), in which two fac(S)-[Rh(aet)3] units are linked by two trans-[Pt(NH3)2]2+ moieties, was synthesized by the 1:1 reaction of fac(S)-[Rh(aet)3] (aet = 2-aminoethanethiolate) with trans-[PtCl2(NH3)2] i…
Polymers such as poly(ethylene glycol) (PEG) have proven use in a variety of applications including organic synthesis. We now disclose our investigations into the recently disputed report that PEG tartrate esters can reverse the enantioselectivity of the Sharpless asymmetric epoxidation reaction. The results presented…
CO adsorption on four MoSx (stoichiometric and nonstoichiometric) clusters has been investigated by using density functional method. It is found that CO prefers adsorption on the coordinatively unsaturated (1010) surface. The adsorption energy of high coverage shows the additivity as compared with that of one CO adsor…
A quantitative structure-enantioselectivity relationship was established for a combinatorial library of enantioselective reactions performed by addition of diethyl zinc to benzaldehyde. Chiral catalysts and additives were encoded by their chirality codes and presented as input to neural networks. The networks were tra…
A novel stable organic radical, 7,7-diphenyl-6,7-dihydro[1,2,5]thiadiazolo[3,4- f ]quinoline-6-oxyl ( 1 ), forms a one-dimensional columnar structure consisting of slipped π-stacks, which is in contrast to dimer formation of the isoelectronic benzologue, 3,3-diphenyl-3,4-dihydrobenzo[ f ]quinoline-4-oxyl ( 2 ). Magnet…
The "carpet"/brush double layer structure in the polyelectrolyte layer in the amphiphilic diblock copolymer monolayer at the air-water interface was quantitatively studied by in situ neutron reflectometry in addition to X-ray reflectivity measurements. As a result of the higher contrast between polyelectrolyte [poly(m…
Abstract Polycrystalline Eu 2 Mo 3 O 12 has been synthesized and characterized by X‐ray and electron diffraction, high resolution electron microscopy and magnetic measurements. This oxide shows a complex scheelite superstructure whose essential feature is the existence of isolated Mo tetrahedra. Each Mo atom has four…
Elementary Pt∕SrBi2Ta2O9∕Pt ferroelectric capacitors have been structurally characterized by x-ray diffraction using highly brilliant synchrotron radiation. A microstructural analysis of the stacked layers was performed from the collection of high-quality one-dimensional and two-dimensional diffraction patterns. Durin…
High-resolution X-ray diffraction and polarized neutron diffraction experiments have been performed on the Y-semiquinonate complex, Y(HBPz3)2(DTBSQ), in order to determine the charge and spin densities in the paramagnetic ground state, S = (1/2). The aim of these combined studies is to bring new insights to the antife…