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。
Theoretical study on the electronic structures and related properties of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and its cationic lipid derivates in the charge/discharge processes has been carried out using the density functional theory (DFT) at the (U)B3LYP/6-31G(d,p) or 6-31+G(d,p) level. The changes and regula…
This work deals with the design evaluation and influence of absorber doping for a-Si:H/a-SiC:H/a-SiGe:H based thin-film solar cells using a two-dimensional computer aided design (TCAD) tool. Various physical parameters of the layered structure, such as doping and thickness of the absorber layer, have been studied. For…
CVD diamond coated inserts with different coating thickness are fabricated using hot filament chemical vapor deposition (HFCVD) method. Scanning electron microscope (SEM) and Raman spectroscopy are introduced to characterize the diamond films. The cutting performance of as-fabricated CVD diamond coated inserts is eval…
12 páginas
We demonstrate that polyurea films can be prepared by alternating deposition with automated deposition control involving quartz crystal microbalance monitoring and optical source heating. The thickness of the films was linearly controlled by changing the repetition time of deposition, and the stoichiometry obtained wa…
Structures and stability of nonpolar AlN(1 00) and (11 0) surfaces under hydrogen rich conditions are theoretically investigated by performing total-energy calculations within the density functional theory. The calculated surface energies demonstrate that several hydrogen incorporated structures are favorable dependin…
Single crystalline n-Si (100) previously coated with sparse silver nano-particles were immersed in various solutions of ammonium fluoride to investigate their wet etching. In the absence of H2O2, the open circuit potential (OCP) of the silicon was more active in the solutions of 11.0 M than 1.0 M NH4F. In the present…
Date of Conference: 22-27 April 2012
Background: Treatment with aqueous extract of Calotropis Procera was examined only for short periods. So, The present study was designed to examine the influences of long term administrations of aqueous extract of Calotropis Procera on male and female rabbits. Material and methods: The extract was daily oral administe…
Introduction: Pseudomonas aeruginosa is a key opportunistic pathogen causing severe acute and chronic nosocomial infections in immunocompromised or catheterized patients. It is prevalent in burn wound infections and is generally multi-drug resistant.This study evaluated antimicrobial activity of ZnO nanoparticles, cat…
The phase composition and superconducting properties of high-temperature superconductors of homologous series of Bi1.7Pb0.3Sr2Ca n − 1Cu n O y (n = 4−9) based on amorphous precursors obtained under the influence of solar energy was studied. The formation of structural defects was established, and their relation with t…
Abstract : This Coastal and Hydraulics Engineering Technical Note (CHETN) summarizes research efforts that have taken place since the 2008 fiscal year (FY) within the Coastal Inlets Research Program (CIRP) concerning asset management of coastal navigation channels. Specifically, the details concerning the conceptual b…
We designed a novel organic dye with a heteroleptic dual-electron acceptor (cyanocrylic acid and rhodanine-acetic acid) on each side of a phenothiazine-based organic dye as a photosensitizer for dye-sensitized solar cells (DSSCs). Density functional theory (DFT) and time-dependent density functional theory (TDDFT) cal…
A new fractional melting (FM) process that uses centrifugal force to separate the liquid from the cake (liquid + solid) was developed for refining metallurgical grade Si. The behavior of the solute and the refining mechanism during the FM process were studied using scanning electron microscopy (SEM) and electron probe…
Two series of Cd 1− x In x NNi 3 (0 ≤ x ≤ 0.2) and Cd 1− y Cu y NNi 3 (0 ≤ y ≤ 0.2) samples were prepared from CdO, In 2 O 3 , CuO, and nickel powders under NH 3 atmosphere at 773 K. The structural and physical properties were investigated by means of X-ray powder diffraction temperature-dependent resistivity and magn…
Using simple combustion apparatus the effect of wood fibres on the flammability properties of Low Density Polyethylene (LDPE) was studied. Composite samples were prepared with LDPE and Kola Nitida (KN), and LDPE and Alstonia Boonei (AB) with fibre contents of 0, 5, 10, 15, and 20 wt. %. Test results show that ignition…
Brush-like block copolymers with poly( t -butyl methacrylate) (PBMA) and poly( N -isopropylacrylamide) (PNIPAAm) as side arms, PBMA- b -PNIPAAm, were designed and synthesized via a simple free radical polymerization route. The chemical structure and molecular weight of these polymer brushes were characterized and dete…
Torrefaction is being widely investigated for improving the quality of wood and agricultural residues for gasification and combustion applications. Torrefaction is thought to increase the energy density of biomass and decrease the energy required for grinding as well as reducing the moisture content of the material. H…
The presence of impurity ions in ferroelectric liquid crystals (FLC) could produce a significant impact on the chirality of the medium with a possible modification in the polarization profile of the system. We theoretically observed these possibilities by considering an in-plane and bulk free energy density for the sa…
Abstract Recently, nano-materials have received increasingly more attention for their potential applications as structural and functional materials. The unique mechanical properties of CNTs, their high strength and stiffness and the enormous aspect ratio provide potentials for the improvement of the mechanical propert…