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。
The adsorption of a single and negatively charged polyion with varying flexibility onto a surface carrying both negative and positive charges representing a charged membrane surface has been investigated by using a simple model employing Monte Carlo simulations. The polyion was represented by a sequence of negatively…
Abstract A facile and versatile solution‐based approach was developed to prepare semiconductor metal oxide nanobelt‐conducting organic polymer core‐shell nanocomposites. Well‐defined nanobelts of several types of oxide nanobelts were combined with conducting polymer [polypyrrole (PPy) and polyaniline (PANi)] via in si…
Abstract A novel phosphorus‐containing trifunctional novolac (dopotriol) was synthesized through the addition reaction of 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene 10‐oxide and rosolic acid. The structure of dopotriol was confirmed with NMR spectroscopy and elemental analyses. The dopotriol was blended with phenol nov…
Hollow-fiber membranes of mixed conducting perovskite Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3 - δ were prepared using a sequence of extrusion, gelation, and sintering steps. For this purpose, a finely divided mixture of the component oxides was prepared by the modified Pechini technique and suspended in a polymer solution. Th…
A simple strategy in terms of fabrication time (within minutes) and composition phase domains was used to design optical cage mesostructured silica monoliths with shape- and size-controlled cavities and entrance pores, large-sized glass (crack-free), thick-walled framework up to 20 nm thick, uniformly sized mesopores…
Zinc oxide films are typically found to be n type, and conductive under most growth conditions and growth methods. Co-doping with multiple elements is one strategy for improving the electrical and optical properties of zinc oxide materials for optoelectronic device applications. Using pulsed-laser deposition, thin ZnO…
Au-particle/Al2O3-matrix nanocomposite thin films with a narrow Au particle size distribution were fabricated by radio-frequency magnetron cosputtering. The films were characterized both chemically and structurally using x-ray photoelectron spectroscopy, x-ray diffraction, and transmission electron microscopy. The opt…
Selected highlights in the recent development of microplasma devices are reviewed with emphasis on large arrays of Si-based hybrid plasma/semiconductor pixels. Arrays of 40 000 (200 x 200) pixels, excited by sinusoidal ac waveforms at frequencies of 5-20 kHz, have now been realized. The fabrication of these arrays and…
A new aluminum hydroxide cluster with eight Al(III) ions linked together by a series of hydroxyl bridges as a sulfate salt has been synthesized from aqueous solution and characterized by X-ray crystallography and 27Al NMR spectroscopy.
The fundamental properties of lithium amide $\mathrm{Li}\mathrm{N}{\mathrm{H}}_{2}$, which is fully hydrogenated phase of lithium nitride ${\mathrm{Li}}_{3}\mathrm{N}$, have been investigated by the first-principles calculations using the ultrasoft pseudopotential method, including the structural, electronic, dielectr…
Multi-walled carbon nanotubes (MCNTs) can be obtained by heating grass in the presence of a suitable amount of oxygen. Grass contains a large amount of vascular bundles in the stem and nervation. The major compositions of them are cellulose, hemicellulose and lignin. In the present approach, a rapid heat treatment (at…
Using bismuth(III) hexanoate (BiHex 3 ) as initiator and tetraethylene glycol as co-initiator, ε-caprolactone (εCL) and l -lactide (LLA) were copolymerized in bulk. Whereas monomer/initiator and monomer/co-initiator ratios were kept constant, the temperature was varied from 100 to 140 °C. Amorphous copolyesters having…
The bismuth borates Bi 2 ZnB 2 O 7 and CaBiGaB 2 O 7 have been synthesized by solid-state reactions at temperatures in the 650−825 °C range at 1 atm pressure. These compounds are the only synthetic diborate members of the melilite family, A 2 XZ 2 O 7, in which layers of A cations alternate with XZ 2 O 7 tetrahedral l…
Coevaporated bismuth-tellurium and antimony-tellurium films were fabricated under various deposition conditions (controlled evaporation rates of individual species, substrate temperature, and substrate material), and their thermoelectric (TE) properties (Seebeck coefficient, electrical resistivity, and carrier concent…
Poly(dimethylsiloxane) (PDMS) is a biomaterial that presents serious surface instability characterized by hydrophobicity recovery. Permanently hydrophilic PDMS surfaces were created using electrostatic self-assembly of polyethyleneimine and poly(acrylic acid) on top of a hydrolyzed poly(styrene-alt-maleic anhydride) b…
White hybrid organic/inorganic light-emitting devices (LEDs) have been fabricated by using stable red-emitting CdSe/ZnS core-shell quantum dots (QDs) covered with a trioctylphosphine oxide organic ligand. The device-active structure consists in a host/guest system with a blue-emitting poly[(9,9-dihexyloxyfluoren-2,7-d…
The chemical synthesis, isolation, and characterization of phenyl viologen (PV) as a dication, radical cation, and neutral species are described. Single-crystal X-ray diffraction of PV(2+)2Cl(-.)2H2O and PV(.+)PF(6)(-).pyridine reveals the expected differences in bond lengths and also a structural change from two copl…
Preface.PART ONE.1. Crystal and Electronic Structure of Meals.1.1 Introduction.1.2 Crystal Structures of the Metallic Elements.1.3 Exceptions to the Rule of the Metallic Bond.1.4 Effects of High Pressure on Crystal Structure.1.5 Effect of Electronic Structure on Crystal Structure.1.6 Periodic Trends in Material Proper…
The existence of a very special ratcheting regime has recently been reported in a granular packing subjected to cyclic loading \cite{alonso04}. In this state, the system accumulates a small permanent deformation after each cycle. After a short transient regime, the value of this permanent strain accumulation becomes i…
The interaction of Al2O3 and CeO2 thin films with sulfur dioxide (2.5 mbar) or with mixtures of SO2 with O2 (5 mbar) at various temperatures (30-400 degrees C) was studied by X-ray photoelectron spectroscopy (XPS). The analysis of temperature-induced transformations of S2p spectra allowed us to identify sulfite and su…