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。
This work performs a computational study on the thermal expansion behavior of covalent organic frameworks (COFs). The results demonstrate that COFs show negative thermal expansion (NTE), and the origin of the NTE behavior is the motion of the aromatic carbon rings with temperature, providing a better understanding of…
We developed a green, low-cost, bioinspired aqueous synthesis method to fabricate one-dimensional (1D) vertically aligned ZnO nanorod arrays on zinc substrates at room temperature. Scanning electron microscopy images, transmission electron microscopy images, and energy-dispersive X-ray spectrum show densely well-align…
The diffusion of moisture‐related species into both tetragonal and cubic single crystals at temperatures characteristic of moisture‐enhanced low‐temperature degradation of tetragonal zirconia is reported using secondary ion mass spectrometry (SIMS). The crystals were immersed in D and O 18 isotopically labeled water a…
Abstract FT‐IR and FT‐Raman spectra of 4‐chloro‐2‐(3‐chlorophenylcarbamoyl) phenyl acetate were studied. Vibrational wavenumbers and corresponding vibrational assignments were examined theoretically using the Gaussian03 set of quantum chemistry codes and the normal modes are assigned by potential energy distribution (…
A color filter incorporating a two-dimensional (2D) submicrometer metal grating is proposed. The device is designed by utilizing rigorous coupled-wave analysis (RCWA) and consists of four parts: a polymethyl methacrylate (PMMA) substrate, a dielectric film of high refractive index, a submicrometer grating, and a diele…
We report on the structural and electrical characterization of Mo thin films deposited at room temperature by RF magnetron sputtering. The effect of RF power on the morphology and residual stress of the films is analyzed. The films are under compressive stress and consist of densely packed columns with a lateral size…
Bulk Ti 3 AlC ceramic containing 2.68 wt% TiC was prepared by an in situ reaction/hot‐pressing route. The reaction path, microstructure, mechanical and thermal properties were systematically investigated. At room temperature Vickers hardness of Ti 3 AlC ceramic is 7.8 GPa. The flexural strength, compressive strength,…
GeO 2 nanowires doped with Eu, Er, or Mn, as well as codoped with each of these ions and Sn, have been grown by a catalyst-free vapor−solid process. The incorporation of Sn has been found, in all cases, to favor the formation of straight wires, which make them more appropriate for waveguiding purposes. Cathodoluminesc…
A large photoinduced change in reflectivity has been observed in the low-temperature charge separated (CS) phase of a dimeric radical anion salt, ${\text{Et}}_{2}{\text{Me}}_{2}\text{Sb}{[\text{Pd}{(\text{dmit})}_{2}]}_{2}$ ($\text{dmit}=1,3$-dithiol-2-thione-4,5-dithiolate). Just after the photoexcitation, the reflec…
Measurements of basal plane longitudinal ${\ensuremath{\rho}}_{b}(B)$ and Hall ${\ensuremath{\rho}}_{H}(B)$ resistivities were performed on highly oriented pyrolytic graphite samples in a pulsed magnetic field up to $B=50\text{ }\text{ }\mathrm{T}$ applied perpendicular to graphene planes, and temperatures $1.5\text{…
Abstract Surfaces capable of covalently immobilizing a dense layer of bioactive protein may be used to stimulate desired cellular responses at the surface of an implant. Pulse biased plasma polymerization onto metallic substrates is studied with the aim of producing surfaces suitable for such biomimetic in vivo implan…
The reaction of [W(CN)(6)(bpy)](-) with the corresponding Mn Schiff bases led to the formation of two antiferromagnetic (1) and ferromagnetic (2) chains. The formation of the conglomerate (2) is associated with chiral induction by the enantiomeric chelate-ring conformation of the Mn Schiff base. Modulation of the link…
A hybrid material where polymeric nitrogen chains are sandwiched between graphene sheets in the form of a three-dimensional crystal, is predicted by means of ab initio simulations. It is demonstrated that chainlike polymeric nitrogen phase becomes stable at ambient pressure when intercalated in a multilayer graphene m…
We investigate the acousto-plasmonic dynamics of metallic nano-objects by means of resonant Raman scattering and time-resolved femtosecond transient absorption. We observe an unexpectedly strong acoustic vibration band in the Raman scattering of silver nanocolumns, usually not found in isolated nano-objects. The frequ…
The continuous test on oil impregnated pressboard insulation with internal void defect was developed and the phase resolved partial discharge (PRPD) pattern of partial discharge (PD) signals during the electrical aging process was measured. Two different void structures which have different void volume were used in th…
Dopant-carrier magnetic exchange interactions in semiconductor nanostructures give rise to unusually large Zeeman splittings of the semiconductor band levels, raising possibilities for spin-based electronics or photonics applications. Here we evaluate the recently highlighted possibility of confinement-induced kinetic…
We demonstrate that while the metastable face-centered cubic (fcc) phase of Ge2Sb2Te5 becomes amorphous under hydrostatic compression at about 15 GPa, the stable trigonal phase remains crystalline. Upon higher compression, a body-centered cubic phase is obtained in both cases around 30 GPa. Upon decompression, the amo…
Tailoring the structural and electronic properties of 3D nanostructures via bottom-up techniques would pave the way for novel low-cost applications. One of such possibilities is offered by ZnO branched nanostructures like tetrapods, that have recently attracted attention for nanodevice applications from nanoelectronic…
This study investigates the effect of CuO on the sintering behavior, dielectric properties, and microstructures of Ba 0.6 Sr 0.4 TiO 3 (BST) ceramics. The ceramics were sintered in air at temperatures ranging from 1000° to 1230°C. It is found that a small amount of added CuO (0.6 mol%) can significantly increase the d…
We calculated the desorption energy of MgH(2) clusters using the highly accurate quantum Monte Carlo (QMC) approach, which can provide desorption energies with chemical accuracy (within approximately 1 kcal/mol) and therefore provides a valuable benchmark for such hydrogen-storage simulations. Compared with these QMC…