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。
Oxidative thermal degradation and flame retardant behaviour of cotton fabric coated with intumescent formulations containing nanoclay as well as metals (Cr, Cu and Zn) were studied by thermogravimetry (TG), differential thennal analysis (DTA) and limiting oxygen index (LOI). Activation energy of thermal degradation of…
A single-walled carbon-nanotube-array-based (SWCNT) strain sensor was proposed and its fabrication technique was presented, which afforded more simple process than individual SWCNT-based sensor. A novel selective treatment of strain-based electrical breakdown was utilized to leave the SGS-SWCNTs with high gauge factor…
The ability of Density Functional Theory to predict the electronic and magnetic properties of semi-infinite graphene with a single bare edge has been probed. In order to improve the accuracy of spin-unrestricted calculations performed with semilocal density functionals, higher-level methods including double hybrid den…
The location and size distribution of silicon nanocrystals (Si-nc) formed in SiO2 by Si ion implantation and annealing were investigated. Transmission electron microscopy images revealed that the location and size distribution of the Si-nc are strongly correlated with the location of the vacancies produced in the SiO2…
Abstract This paper was amended in June 2013 because of a change of the author's names. The corrected author byline is presented on the last page of the pdf‐file. Within the presented study, the economic potential of PVD‐coatings for the surface refinement and protection of Mg‐alloys is fully examined. The research in…
Abstract We analyzed aromatic and magnetic properties of two typical expanded porphyrins, sapphyrin and orangarin, using our theory of aromaticity and ring-current diamagnetism and confirmed that, as in the case of free-base porphine, global aromaticity and macrocyclic circulation are associated primarily with five py…
Data on the thermogravimetry, spectroscopy, and electrical charge transfer as functions of T, aH2O, and aO2 for niobates and tantalates of alkali-earth metals with structure disordering of the oxygen sublattice, which can show high-temperature proton conduction, are summarized. It is shown that in the solid solution s…
In this work, we use Mu and Epsilon-Near-Zero (MENZ) metamaterials to realize the substrates that can modify the emission of an embedded line source. Simulation results show that the cylindrical waves emitted from the line source can be perfectly converted to plane wave through the MENZ metamaterial slab with planar e…
With mean-field dynamic density functional theory, we study the morphologies of sphere-forming diblock copolymers confined between two homogeneous surfaces. The effects of the film thickness and the surface field strength on the phase behavior of sphere-forming copolymer film are investigated. The morphologies deviati…
Co-firing biomass with coal in pulverized fuel combustion plants can lead to significant corrosion problems due to the release of aggressive species from some types of biomass. The resulting deposits on heat exchangers in the power plant hot gas path can contribute to breakdown of protective oxide films and lead to ac…
A new class of carbon nanostructures is considered: covalently (or molecularly) bound graphene and carbon nanotube fragments. As found using semiempirical computations and molecular dynamics methods, the structures formed by bonding nanotube edge atoms to a planar segment of a graphene nanofragment or its edge atoms t…
It is a great challenge to spontaneously assemble achiral molecules into twisted nanostructures in the absence of chiral substances. Here we show that two achiral centrosymmetric quinacridone (QA) derivatives, N,N′ -di( n -hexyl)-1, 3, 8, 10-tetramethylquinacridone (C6TMQA) and N,N′ -di( n -decyl)-1, 3, 8, 10-tetramet…
Abstract Environmental problems caused by petroleum-based plastics have led to interest in alternatives made from biodegradable polymers (bioplastics), but little effort has been made to evaluate horticultural containers made from these materials. We hypothesized the stability and longevity of containers made from pol…
The temperature dependence of tin diffusion coefficients in the nuclear fuel rod cladding tube material Zircaloy-4 is determined in the range of 1 000–1 400 °C by means of X-ray fluorescence measurements. During oxidation at these temperatures, tin is redistributed, as shown in the figure. Due to tin diffusion in zirc…
The objective of this study was to extract and concentrate calcium oxalate (CaOx) crystals from plant leaves that form the above mentioned crystals. The chemical and physical studies of CaOx from plant to be performed depend on an adequate amount of the crystals. The plant used in this study was croton (Codiaeum varie…
We have used conducting atomic force microscopy (CAFM) to study the morphology and electronic behavior of as-received and air-annealed (0001) Zn- and (0001¯) O-polar surfaces of bulk ZnO. Both polar surfaces exhibit relatively flat morphologies prior to annealing, which rearrange to form well-defined steps upon anneal…
In this study, ZnSSe epilayers were grown on (111) ZnS sprayed thin films. The spectral analysis was carried out in the region from 400 to 1800 nm. Analyses of the transmittance and (or) reflectance spectra indicate a decrease of the band gap energy value E g with selenization. As the selenization process changes the…
This paper reports the X-ray photoelectron spectroscopy (XPS), X-ray-induced Auger electron spectroscopy (XAES), and Raman studies of boron- and phosphorous-incorporated tetrahedral amorphous carbon (ta-C) films deposited by the filtered cathodic vacuum arc process. A systematic study of the influence of varying boron…
Abstract The structural phase transition from fluorite to pyrochlore and the strength of the coordination bond of Zr–O in Gd 2 Zr 2 O 7 were investigated by XANES spectra of both O and Zr K ‐edge. The energy difference of the O K ‐edge absorption spectra at 532 and 536 eV was assigned to the crystal field splitting en…
A eficiência da aplicação de filmes à base de proteínas de soro de leite foi avaliada em um sistema de embalagem que consistia em um pote plástico utilizando-se filmes de proteínas de soro de leite como fechamento superior. Pedaços de maçã foram embalados e armazenados à temperatura ambiente (25 °C) e sob refrigeração…