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。
In this letter, a conclusive evidence of the operation of planar slip along with grain boundary mediated mechanisms has been reported during large strain deformation of nanocrystalline nickel. Dislocation annihilation mechanism such as mechanical recovery has been found to play an important role during the course of d…
Abstract The N,O,S‐donor Schiff base ligand 2‐[( E )‐(2‐mercaptophenylimino)methyl]‐4,6‐di‐ tert ‐butylphenolate(2–) (H 2 L) was deprotonated with triethylamine (2 equiv.) and treated with equimolar amounts of Cu(OAc) 2 · H 2 O, PtCl 2 , Pd(OAc) 2 , and CoCl 2 , respectively. The versatility of L 2– is realized in the…
A simple monatomic system in two dimensions with a double-well interaction potential is investigated in a wide range of temperatures by molecular-dynamics simulation. The system is melted and equilibrated well above the melting temperature, and then it is quenched to a temperature 88% below the melting temperature at…
Vibrational spectra of vapor-phase ethanethiol and tert-butylthiol have been recorded in the 1000 to 12,000 cm(-1) region. Both the gauche and trans conformers of ethanethiol are observed. The intensities of SH-stretching vibrations are found to be significantly weaker than the equivalent CH-stretching vibrations and…
We report the results of the Y substitution in Sr1−xYxSi2 with x≤0.15 via measuring the temperature-dependent electrical resistivity, thermal conductivity, as well as Seebeck coefficient. Upon substituting Y onto the Sr sites, the electrical resistivity exhibit semiconducting behavior and the room-temperature electric…
Intrinsic p-type ZnO thin film was fabricated on sapphire substrate by ultrasonic spray pyrolysis, the p-type ZnO film is achieved using O2 as the carrier gas, with a resistivity of 2.18 Ω cm−1, a carrier concentration of 1.10×1016 cm−3, and a high Hall mobility of 261 cm2/V s. The scanning capacitance microscopy imag…
Abstract Homogeneous membranes based on PA/C 60 composites were obtained and their internal morphology was visualized using SEM. The interaction between PA and C 60 was studied by spectroscopic methods. The effect of C 60 inclusion in the PA matrix on physical properties was characterized by measurement of the intrins…
We study the low volume fraction and electric field phase behavior of a Brownian colloidal suspension. On the application of a uniform ac field, we find a novel phase where chains of particles aggregate to form a well defined cellular network, consisting of particle-free "voids" surrounded by a percolating network of…
Magnetoelectric phase diagrams of the perovskite manganites, Eu1-xYxMnO3 and Gd1-xTbxMnO3, are theoretically studied. We first construct a microscopic model, and then analyze the model using the Monte-Carlo method. We reproduce the diagrams, which contain two different multiferroic states, i.e., the ab-plane spin cycl…
The structural and mechanical properties of γ-B28 are investigated using first-principles density functional calculations. The single-crystal elastic constants calculations show that γ-B28 is mechanically stable under ambient conditions. The predicted bulk and shear moduli of γ-B28 are comparable to those of boron sub…
Oxygen vacancies on ZnO(0001) have been proposed to be the catalytically active sites for methanol synthesis on pure ZnO. The charge state and thus the chemical reactivity of such vacancies on this polar O-terminated basal plane of ZnO is expected to be intimately connected to the degree of its hydroxylation in view o…
Synthetic haggite V(4)O(6)(OH)(4) has been successfully obtained for the first time after a delay of more than 50 years. Our careful analysis clarifies the formula of haggite as V(4)O(6)(OH)(4), rather than the long-standing known V(4)O(4)(OH)(6). The semiconductor of haggite shows a rapid increase of resistance by >1…
Simultaneous crystal structure, microstructure, and morphology modeling with convolution-based profile fitting of angle-dispersive synchrotron x-ray diffraction data was applied to retrieve the size-dependent lattice changes in nanocrystalline rutile TiO2. The dominant prismatic crystallite morphology was adequately m…
Here, we demonstrate a new method to measure the domain sizes and the periodicities of the pore arrangements and to find the domain boundaries in the designed PAA film with conical nanopores. Such structural information can be simultaneously obtained by utilizing the electron moiré fringes without direct observation o…
The advancement in carbon nanotube (CNT) technology includes significant interest in their functionalization to modify their chemical and physical properties. In particular, the selective functionalization of the CNT ends opens exciting opportunities to design nanoscale architectures and networks. The realization of h…
An efficient synthesis of poly(methyl methacrylate)-grafted SWCNT composites (PMMA-SWCNTs) were developed by using in situ atom transfer radical polymerization of methyl methacrylate onto SWCNTs sonicated in o -dichlorobenzene (ODCB) in one step. Morphology studies with HRTEM and AFM and solubility changes of the PMMA…
A CuO/CeO 2 catalyst prepared by incipient wetness impregnation (7 wt % Cu) with well-dispersed CuO on nanosized ceria, has been used to obtain a kinetic expression for CO oxidation, including estimation of kinetic parameters, in the absence of CO 2, H 2 O, or H 2 in the feed stream. Experimental data were checked to…
CeO 2 hollow spheres were successfully prepared via a layer-by-layer (LBL) method using carbon spheres as sacrificial template and hexamethylenetetramine as precipitating agent. Transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectrum (XPS) were used for their characterization.…
Nano-ZnS with mixed cubic and hexagonal stacking was synthesized via reaction of zinc acetate with thioacetamide in a weakly acidic solution, while nano-ZnS in primarily the sphalerite phase was synthesized in a basic solution. X-ray diffraction (XRD) and transmission electron microscopy were used to characterize the…
Developing biomaterial scaffolds to elicit specific cell responses is important in many tissue engineering applications. We hypothesized that the chemical composition of the scaffold may be a key determinant for the effective induction of differentiation in human mesenchymal stem cells (hMSCs). In this study, electros…