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 This Feature Article reviews recent progress in the tailored assembly of carbon nanotubes and graphene into three‐dimensional architectures with particular emphasis on our own research employing self‐assembly principles. Carbon nanotubes and graphene can be assembled into macroporous films, hollow spherical c…
With its two degenerate valleys at the Fermi level, the band structure of graphene provides the opportunity to develop unconventional electronic applications. Herein, we show that electron and hole quasiparticles in graphene can be filtered according to which valley they occupy without the need to introduce confinemen…
The majority of work in graphene nanocomposites has focused on polymer matrices. Here we report for the first time the use of graphene to enhance the toughness of bulk silicon nitride ceramics. Ceramics are ideally suited for high-temperature applications but suffer from poor toughness. Our approach uses graphene plat…
Advances in the fabrication and characterization of nanoscale systems now allow for a better understanding of one of the most basic issues in science and technology: the flow of heat at the microscopic level. In this Colloquium recent advances are surveyed and an understanding of physical mechanisms of energy transpor…
Using density functional theory coupled with Boltzmann transport equation with relaxation time approximation, we investigate the electronic structure and predict the charge mobility for a new carbon allotrope, the graphdiyne for both the sheet and nanoribbons. It is shown that the graphdiyne sheet is a semiconductor w…
Molybdenum hexacarbonyl encapsulated in polystyrene, Mo(CO) 6 @PS, was prepared by suspension polymerization of styrene and divinylbenzene in the presence of Mo(CO) 6 . This catalyst was found as an efficient catalyst for epoxidation of a wide variety of alkenes, including aromatic and aliphatic terminal ones using te…
This chapter provides an overview of Solid Oxide Fuel Cells (SOFCs). It discusses the key features of materials for SOFCs. SOFCs can convert chemical energy to electricity directly at high temperatures. Due to their high operational temperatures, the efficiencies of such systems are estimated to be highest among the f…
Field-induced phase transition in Pb(Zn1/3Nb2/3)O3–8%PbTiO3 was investigated by measuring temperature dependence of the dielectric constant under the DC biasing field. It was revealed that a critical end point (CEP) exists at 170 ± 2°C and 1.5 ± 0.2 kV cm−1. The boundary between the ferroelectric and the paraelectric…
In this study, the coagulation behavior of talc suspensions in the presence and absence of chloride-based metal salts (NaCl, CaCl2 and AlCl3) at a constant (pH 4) and different pHs was assessed by sedimentation tests and zeta potential (ZP) measurements. In addition, the pH-dependent dissolution experiments were perfo…
Abstract The synthesis of glycoside‐based trisiloxane surfactants of the general formula Me 3 SiOSiMeR 1 OSiMe 3 (R 1 = (CH 2 ) 3 (OCH 2 CH 2 ) 2 OR 2 , R 2 = glycosyl) is described, and the surface activity properties of the surfactant are studied. Diethylene glycol monoallyl ether glycoside is synthesized by reactin…
The development of nontoxic, clean techniques for synthesising metal nanoparticles such as gold has attracted increasing attention in recent years. Many reports have been published about the synthesis of gold nanoparticles using plant extracts. However, the stability of these prepared gold nanoparticles has not been i…
The biooxidation of sulfide under denitrifying conditions is a key process in the control of souring in oil reservoirs and in the treatment of gas and liquids contaminated with sulfide and nitrate. The effect of nitrate injection on the microbial community has been evaluated in the setting of offshore oil industry pro…
Dissolution of barium ion from aqueous suspensions of commercial nano-sized barium titanate powders (BaTiO3) has been studied at various pH values, solids loading, different time intervals and different electrolyte concentrations. Zeta potential measurements at various pH values and Fourier transform infrared spectros…
Thermal durability of CoSb 3 in vacuum, helium and air was investigated over the temperature range of 20–850 °C. A scanning electron microscope (SEM) and X-ray powder diffraction technique were used to investigate the microstructure and to carry out the phase analysis of the degradation products. The analysis of a non…
Despite widespread use of silk, it remains a significant challenge to fabricate fibers with properties similar to native silk. It has recently been recognized that the key to tuning silk fiber properties lies in controlling internal structure of assembled β-sheets. We report an advance in the precise control of silk f…
Relaxor ferroelectrics were discovered in the 1950s but many of their properties are not understood. In this review, we shall concentrate on materials such as PMN (PbMg1/3Nb2/3O3), which crystallize in the cubic perovskite structure but with the Mg ion, charge 2+, and the Nb ion, charge 5+, randomly distributed over t…
The results of photoluminescence (PL) measurements performed on high quality single crystal ZnO implanted with radioactive $^{73}\mathrm{Ga}$ and $^{73}\mathrm{As}$, both of which decay to stable $^{73}\mathrm{Ge}$, are presented. Identical effects are observed in the two cases, with a sharp line at 3.3225(5) eV found…
A laboratory hard X‐ray photoelectron spectroscopy (HXPS) system at 5.4‐keV excitation energy was used to measure the angle dependence of a silicon oxide overlayer on a Si(0 0 1) substrate with overlayer thickness ranging from 4 to 25 nm. The thickness values of the SiO 2 overlayers were determined by utilizing a focu…
Polycrystalline PrxNd1−xFe1.9 (0 ≤ x ≤ 1) magnetostrictive alloys were synthesized by high-pressure annealing. The crystal structure, Curie temperature, easy magnetic direction, and magnetostriction of the alloys were investigated. Due to the effects of high pressure, PrxNd1−xFe1.9 alloys are stabilized in a C15 cubic…
We have synthesized a series of hexagonal HoMnO3 nanoparticles with different particle sizes (30 – 200 nm) by a modified Pechini method to study systematically the effect of particle size on their structural and magnetic properties. The magnetic characterization indicates that with increasing the particle size, the an…