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。
Magnetization-angle dependence of the magnetic dipole is extensively studied for bulk, surface, and overlayer systems by using first-principles electronic structure calculations. In most transition-metal ferromagnets, the magnetic dipole is described well in a weak spin-orbit-interaction (SOI) regime with the angle de…
The Zone Melt Crystal Growth Method (FSZM) has been used to produce polycrystalline Galfenol specimens, Fe<sub>81.6</sub>Ga<sub>18.4</sub>, with preferred {100} orientation. This crystal growth technique has advantages over conventional Bridgman methods in that zone rates used were at least an order of magnitude great…
A Zn,Al layered double hydroxide (LDH) with Zn/Al = 1.45 and containing nitrate anions was prepared by coprecipitation and characterized by powder X-ray diffraction, Zn K-edge extended X-ray absorption fine structure spectroscopy (EXAFS), thermogravimetric analysis, FTIR and FT Raman spectroscopy, and (27)Al MAS NMR s…
In the present study, a comprehensive mathematical model is developed to analyze the effects of initial catalyst size, active site concentration, catalyst morphology (e.g., porosity, extent of prepolymerization, etc.), and hydrodynamic conditions on the growth and overheating of highly active Ziegler−Natta catalyst pa…
The hyperthermophilic Archaea Sulfolobus solfataricus grows optimally above 80 degrees C and metabolizes glucose by a non-phosphorylative variant of the Entner-Doudoroff pathway. In this pathway glucose dehydrogenase and gluconate dehydratase catalyze the oxidation of glucose to gluconate and the subsequent dehydratio…
The magnetism and transport properties of heavily doped perovskite ${\mathrm{LaMn}}_{1\ensuremath{-}x}{\mathrm{Fe}}_{x}{\mathrm{O}}_{3}\phantom{\rule{0.3em}{0ex}}(0.00\ensuremath{\leqslant}x\ensuremath{\leqslant}0.40)$ were studied. For the doped samples, there is a paramagnetic--ferromagnetic (PM--FM) transition both…
Micelle-templated silicas (MTS) were synthesized by self-assembly of inorganic silica and micelles of cetyltrimethylammonium bromide (CTAB) containing different amounts of 1,3,5-trimethylbenzene (TMB) at 343 K. Nitrogen sorption isotherms and transmission electron microscopy (TEM) showed that MTS pore size increased w…
Recently it has been shown that a strongly interacting colloidal mixture consisting of oppositely driven particles undergoes a nonequilibrium transition towards lane formation provided the driving strength exceeds a threshold value. We predict here a reentrance effect in lane formation: for fixed high driving force an…
We show that annealing of stoichiometric $\mathrm{Sr}\mathrm{Ru}{\mathrm{O}}_{3}$ perovskites in high-pressure oxygen of $600\phantom{\rule{0.3em}{0ex}}\mathrm{atm}$ near $1100\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$ produces $\mathrm{Sr}{\mathrm{Ru}}_{1\ensuremath{-}v}{\mathrm{O}}_{3}…
Aligned high-density ZnO nanorods were successfully synthesized on porous aluminum oxide (PAO) template. The growth process involves carbonthermal reduction of ZnO as a Zn vapor source and ZnO nucleation on the PAO template without metal catalysts. Field-emission scanning electron microscope images revealed that the n…
The present study investigates in detail the physical gelation of toluene induced by the addition of simple aliphatic diamines to a dendritic L-lysine-based peptide. The gel-phase material obtained was characterized using differential scanning calorimetry, scanning electron microscopy, small-angle X-ray scattering, ci…
The layer by layer deposition process of polyelectrolytes is used to construct films equipped with several compartments containing "free polyelectrolytes". Each compartment corresponds to a stratum of an exponentially growing polyelectrolyte multilayer film, and two consecutive compartments are separated by a stratum…
Integration of relatively simple logic gates into high-level circuits (e.g., half-adder) is highly important not only for the potential application in molecular level devices but also for the understanding of complex mechanisms of some important biological processes. In this report, we demonstrate a novel kind of theo…
We report the immobilization of gold nanorods onto self-assembled monolayers (SAMs) of 16-mercaptohexadecanoic acid (16-MHA). The simple two step protocol involves formation of a SAM of 16-MHA molecules onto gold-coated glass slides and subsequent immersion of these slides into the gold nanorod solution. The nanorods,…
This letter introduces ab initio study of the full activation-volume tensor of crystalline defects as a means to make contact with mechanical response experiments. We present a theoretical framework for prediction of the internal friction associated with divacancy defects and give the first ab initio value for this qu…
"Stealth" nanoparticles made from polymer micelles have been widely explored as drug carriers for targeted drug delivery. High stability (i.e., low critical micelle concentration (CMC)) is required for their intravenous applications. Herein, we present a "core-surface cross-linking" concept to greatly enhance nanopart…
The anisotropically phase-segregated CoPd sulfide nanoparticles, named "CoPd nanoacorns", were spontaneously generated by reducing the corresponding metal precursors with 1,2-hexadecanediol in the presence of various alkanethiols. The CoPd nanoacorn consisting of crystalline Co9S8 and amorphous PdSx phases with the Co…
We analyze the scaling of the crack roughness and of avalanche precursors in the two dimensional random fuse model by numerical simulations, employing large system sizes and extensive sample averaging. We find that the crack roughness exhibits anomalous scaling, as recently observed in experiments. The roughness expon…
We use a matrix Boltzmann equation formalism to test the accuracy of Slonczewski's theory of spin-transfer torque in thin-film heterostructures where a non-magnetic spacer layer separates two non-collinear ferromagnetic layers connected to non-magnetic leads. When applicable, the model predictions for the torque as a…
We study the linear optical properties of helical cylindrical molecular aggregates accounting for the effects of static diagonal disorder. Absorption, linear dichroism, and circular dichroism spectra are presented, calculated using brute force numerical simulations and a modified version of the coherent potential appr…