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。
Electrical resistivity and magnetic susceptibility measurements of the itinerant ferromagnet ${\mathrm{CoS}}_{2}$ at high pressures reveal that its magnetic ordering temperature is tuned to zero at a critical pressure 4.8 GPa, indicating the existence of a quantum-phase transition. The ambient pressure continuous magn…
First-principles calculations within the density-functional theory (DFT) have been carried out to study the geometric and electronic structures of Pb${}_{n}$ clusters with dimensions of up to 3 nm. As distinguished from prolate silicon, germanium, and tin clusters, amorphouslike lead clusters containing more independe…
The shape of the background in x‐ray photoemission spectra is strongly affected by scattered electrons from inelastic energy loss processes. A polynomial of low order has very often been applied to model the secondary‐electron background, giving satisfying results in some cases. An improved analysis employing the Toug…
Abstract Migration behavior of epoxidized neem oil (ENO) from poly(vinyl chloride) (PVC) plasticized with ENO to acrylo nitrile butadiene rubber (NBR) was investigated. Central composite rotatable design (CCRD) for three variables at five levels was chosen as the experimental design. Concentration of Neem oil in PVC m…
A Sn-doped Ga2O3thin film was deposited on a n+-Si substrate by metal-organic chemical vapor deposition. The Ga2O3film was found to be amorphous-like and exhibited n-type conduction with Sn doping. Room-temperature electroluminescence was clearly observed from the Sn:Ga2O3/n+-Si diode, including an ultraviolet (UV) em…
To improve the balance of the electrical conductivity and mechanical strength for dilute Cu-Ti alloys by aging in a hydrogen atmosphere, the influence of aging temperature ranging from 673 K to 773 K (400 °C to 500 °C) on the properties of Cu-3 at. pct Ti alloy was studied. The Vickers hardness increases steadily with…
We have synthesized the composition of Fe3(1-x)Co3xO4 (x =0.1, 0.3 and 0.5) spinel ferrite using the techniques of mechanical alloying, high temperature annealing of milled samples and conventional solid state sintering. We present here comparative results of the crystal structure formation and dielectric properties o…
Self-assembled nanostructures of zwitterionic octaphosphanatoporphyrin 1, of either nanoparticles or nanorods, depending on small changes in the pH, is demonstrated based on the J-aggregates. Porphyrin 1 self-assembled into nanosphere aggregates with a diameter of about 70-80 nm in the pH range 5-7, and nanorod aggreg…
A novel diffraction effect in high-energy electron backscattering is demonstrated: the formation of element-specific diffraction patterns via nuclear recoil. For sapphire (Al(2)O(3)), the difference in recoil energy allows us to determine if an electron scattered from aluminum or from oxygen. The angular electron dist…
Semiconductor nanocrystal quantum dots are utilized in numerous applications in nano- and biotechnology. In device applications, where several different material components are involved, quantum dots typically need to be assembled at explicit locations for enhanced functionality. Conventional approaches cannot meet th…
A direct process for manufacturing polymer carbon nanotube (CNT)-based composite yarns is reported. The new approach is based on a modified dry spinning method of CNT yarn and gives a high alignment of the CNT bundle structure in yarns. The aligned CNT structure was combined with a polymer resin and, after being stres…
Abstract Thermoplastic natural rubber based on polyamide‐12 (PA‐12) blend was prepared by melt blending technique. Influence of blending techniques (i.e., simple blend and dynamic vulcanization) and types of natural rubber (i.e., unmodified natural rubber (NR) and epoxidized natural rubber (ENR)) on properties of the…
The assignment of the vibrational spectra of lithium hydroxide monohydrate, LiOH·H(2)O, has been controversial for more than half-a-century. Here we show that only the combination of all three forms of vibrational spectroscopy: infrared, Raman and inelastic neutron scattering spectroscopies coupled with periodic-densi…
The use of small molecule drugs in cancer chemotherapy has mostly been limited by dose-dependent toxicity and development of drug resistance resulting from repeated administrations. To overcome such problems, efforts have been made to develop drug delivery systems that can bear multiple therapeutic agents in one syste…
In this work, a membrane-dispersion microstructured reactor was specially designed to prepare PB (pseudoboehmite) with a large pore volume and a large pore size through the reaction of CO 2 and an aqueous solution of NaAlO 2 . Tiny crystals of PB and a suitable template are necessary for generating large pore diameter…
Few‐layered sheets of graphene were synthesized on polycrystalline thin Co and Ni films by low pressure chemical vapor deposition. On average, thinner layers of graphene were synthesized on Co than on the conventional Ni at the same process conditions, but slightly higher defects were detected on Co‐grown graphene lay…
Simultaneous and direct x-ray measurements of the smectic layer spacing, molecular tilt, and orientational order in the de Vries smectic $A$ ($\mathrm{Sm}A$) and $C$ ($\mathrm{Sm}C$) phases of two organosiloxane mesogens reveal that (i) the $\mathrm{Sm}C$ (tilt) order parameter exponent $\ensuremath{\beta}=0.26\ifmmod…
Near-infrared surface-enhanced Raman spectroscopy (SERS) is a powerful technique for analyzing the chemical composition within a single living cell at unprecedented resolution. However, current SERS methods employing uncontrollable colloidal metal particles or non-uniformly distributed metal particles on a substrate a…
Hunting high and low: A cyanide-bridged rhombic mixed-spin FeII–FeII complex that features low-spin (LS) and high-spin (HS) FeII centers was prepared by self-assembly including the decomposition of SeCN. The structural motif represents a hybrid [2×2]grid/metallocyclic architecture (see picture).
Abstract Poly(siloxane‐urethane) crosslinked structures were prepared from isophorone diisocyanate, α,ω‐bis(hydroxybutyl)oligodimethylsiloxane and a new hybrid diol containing hydrolysable SiOC 2 H 5 groups besides OH groups. The latest was synthesized by the acid‐catalyzed reaction between 1,3‐bis(3‐glycidoxypropyl)…