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。
A theory of isothermal structural relaxation and creep of glasses below the glass transition temperature is given. According to the interstitialcy theory, the supercooled liquid state does not exist below a Kauzmann ``pseudocritical'' temperature ${T}_{k}$, which lies above the temperature ${T}_{K}$, commonly called t…
Abstract For the first time, hollow PbTe nanospheres with diameters of 80−140 nm have been prepared in an ether/glycerol microemulsion system and PbTe single‐crystalline nanotubes with diameters of 60−80 nm have been synthesised in a homogeneous ethanol/glycerol system. They can be facilely controlled via a solvotherm…
This review summarizes the recent progress in experimental determination of electron densities in inorganic crystals and its contribution to our understanding of bonding and density functional approximations. The experimental techniques for electron density mapping are presented, including the accurate measurement of…
Thin films of graft copolymers consisting of poly(N-isopropylacrylamide) (PNiPAAm) or poly(N,N-diethylacrylamide) (PDEAAm) as polymer backbone and poly(ethyleneglycol) as side chains were cross-linked on fluoropolymer substrates by low-pressure plasma treatment. All immobilized polymers exhibit a lower critical soluti…
Abstract A new method was developed for preparing polystyrene‐functionalized multiple‐walled carbon nanotubes (MWNTs) through the termination of anionically synthesized living polystyryllithium with the acyl chloride functionalities on the MWNTs. The acyl chloride functionalities on the MWNTs were in turn obtained by…
The synergetic effect in multicomponent catalysts is a topic of profound industrial importance and intense academic interest. On a newly identified multicomponent catalyst, $\mathrm{A}\mathrm{u}/\mathrm{I}\mathrm{r}{\mathrm{O}}_{2}/\mathrm{T}\mathrm{i}{\mathrm{O}}_{2}$, first-principles density-functional theory is an…
Structures of modular supramolecular architectures consisting of a hexameric, diphenylethyne-linked porphyrin macrocyclic array and the corresponding host-guest complex formed by inclusion of a tripyridyl guest molecule were characterized in solution using high-angle X-ray scattering. Scattering measurements made to 6…
In this work we review our present understanding of superconductivity in Magnesium Diboride from the theoretical perspective as it evolves from band structure calculations. Particular emphasis is placed on two gap superconductivity. Some of its peculiar consequences are discussed, in particular upper critical field an…
In a recent paper [Ferrari et al., Phys. Rev. E 69, 035102(R) (2004)], the scaling law of the fluctuations of the step limiting a crystal facet has been computed as a function of the facet size. Ferrari et al. use rigorous, but physically rather obscure, arguments. Approaching the problem from a different perspective,…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTRole of the Surface in Luminescent ProcessesBillie L. Abrams and Paul H. HollowayView Author Information Sandia National Laboratories, P.O. Box 5800-1421, Albuquerque, New Mexico 87185, and Department of Materials Science and Engineering, University of Florida, P.O. Box 116400,…
We present a time-dependent Ginzburg-Landau model of nonlinear elasticity in solid materials. We assume that the elastic energy density is a periodic function of the shear and tetragonal strains owing to the underlying lattice structure. With this new ingredient, solving the equations yields formation of dislocation d…
One of the major industrial challenges is to profit from some fascinating physical features present at the nanoscale. The production of dissipationless nanoswitches (or nanocontacts) is one of such attractive applications. Nevertheless, the lack of knowledge of the real efficiency of electronic ballistic/non dissipati…
We apply a Langevin model to investigate the nonlinear ac responses of electro-magnetorheological (ERMR) fluids under the application of two crossed dc magnetic (z axis) and electric (x axis) fields and a probing ac sinusoidal magnetic field. We focus on the influence of the magnetic fields which can yield nonlinear b…
The p-electrons of carbon in the interstitial compound Fe3C hybridize with the Fe d-band and enhance the valence electron concentration of Fe from 8 to 8.67. At this concentration, substitutional 3d transition metals and alloys exhibit strong moment-volume coupling phenomena and associated magnetovolume instabilities,…
A novel and effective protocol for the surface modification and quantitative characterization of magnetic polymeric nanospheres prepared by miniemulsion polymerization is reported. Composite nanospheres consisting of polymer-coated iron oxide nanoparticles were prepared by the miniemulsion polymerization of methyl met…
Shear-induced phase separation was found in "nonentangled" oligomer mixture. The sheared mixture in one phase becomes turbid and its scattering pattern exhibits so-called "butterfly pattern" which is commonly observed in shear-induced phase separation of semidilute polymer solutions. The origin of the shear-induced ph…
Zink macht einen Unterschied: Die neuen Komplexe [(3,5-Me2C5H3N)2Zn(ESiMe3)2] (1: E=Se, 2: E=Te, siehe Bild, Te rot, Zn blau, Si gelb, N grün) erwiesen sich als gute Reagentien für die Erzeugung von ternären MM′E-Materialien. Aus 2 wurde der ternäre ZnCdTe-Nanocluster [Zn2.6Cd7.4Te4(TePh)12(PnPr3)4] hergestellt. Seine…
Using density functional theory, we have theoretically studied sidewall functionalization of carbon nanotubes (CNT) with a nucleophilic organic carbene, dipyridyl imidazolidene (DPI). When compared to the dissociated system, formation of the adduct from defect-free (5,5) tube and the DPI is weakly exothermic. However,…
This investigation has been performed to test the feasibility of using K2YF5:Tb3+ crystals as thermoluminescence dosemeters (TLD). K2YF5 single crystals doped with 0.2, 10.0 and 50.0 at.% of trivalent optically active Tb3+ ions as well as K2TbF5 and undoped K2YF5 crystals have been synthesized under hydrothermal condi…
Micron-sized water droplets in a cryogenic flow tube were probed by IR spectroscopy. The analysis of the IR spectra suggests that there is a relative increase of about 30% in the fraction, f(L), of low density domains in water on cooling over the temperature range between 300 and 240 K. The results derived from the ex…