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。
The wet etching of Pb(Zr,Ti)O 3 (PZT) thin films has gained considerable attention in microelectromechanical systems (MEMS) since it is economical and effective compared with dry-etching methods. In this paper, a novel wet-etching process is proposed for PZT thin film patterning using 1BHF:2HCl:4NH 4 Cl:4H 2 O solutio…
A set of lysimeter based experiments was carried out during 2000/01 to evaluate the impact of soil type and grassland management on potassium (K) leaching. The effects of (1) four soil textures (sand, loam, loam over chalk and clay), (2) grazing and cutting (with farmyard manure application), and (3) K applied as inor…
Abstract Biodegradable composites based on cellulose derivatives/starch blends reinforced with sisal short fibers were fabricated by injection molding. Results of short‐term flexural creep tests are reported to investigate the time‐dependence behavior of the composites. Fiber content and temperature effects are also c…
Abstract The influence of grinding on colour and particle-size properties of talc and smectite from a white bentonite were studied and compared with a fine-grained calcite from a chalk. Grinding decreased the grain size of all three minerals. The crystallite size and structure of smectite was not affected but the crys…
Chitosan films or membranes can be obtained by casting chitosan solutions in acetic acid at 1 % w/v concentration at room temperature. The films set were elaborated from 2% chitosan solutions mixed with three plasticizers (polyethylene glycol 200 (PEG), sorbitol and glycerol) and two surfactants (Tween 60 and Tween 80…
Structural proteomics aims to understand the structural basis of protein interactions and functions. A prerequisite for this is the availability of 3D protein structures that mediate the biochemical interactions. The explosion in the number of available gene sequences set the stage for the next step in genome-scale pr…
Previous experimental indications of ferroelectricity with Curie temperature (TC) of 747 K in BaTi2O5 are confirmed through assessment of its structural stability and estimation of its spontaneous polarization using first-principles density functional theory calculations. The present work establishes that the polariza…
This paper describes the synthesis and characterization of organic/inorganic hybrid materials formed from TiO2 nanoparticles and polyaniline (PANI). The preparation method is based on a sol-gel technique using titanium tetra-isopropoxide as oxide precursor, and two synthetic routes to the hybrids formation were employ…
Abstract The tensile properties and the fracture toughness, based on the essential work of fracture (EWF) method, of melt‐compounded polymer nanocomposites based on polypropylene (PP) with organo‐modified clays (montmorillonite) and maleic anhydride (MA)–grafted PP coupling agents were studied. Depending on the compou…
Solid-state NMR spectroscopy is used to monitor the layer-by-layer (L-B-L) growth of polyelectrolyte multilayers on colloidal silica. The dynamics and conformation of polyelectrolyte multilayers comprised of the weak polycation, poly(allylamine) hydrochloride, and the strong polyanion, poly(sodium-4-styrene sulfonate)…
Abstract Polyester/clay nanocomposites were prepared by melt compounding with different clay loadings. Comparing against neat polyester resins, the crystallization and multiple melting behavior of the nanocomposites was investigated by differential scanning calorimetry (DSC) and X‐ray diffraction (XRD). Nanoclay fille…
Major advances over the last few years have facilitated the synthesis of a large variety of meso-only substituted corroles that display interesting catalytic, therapeutic and photophysical properties. This work is the first to study extensively the NMR spectral characteristics of both metallated and non-metallated tri…
Abstract Halloysite and kaolinite occur in gneissic weathering profiles developed under a temperate climate in the Leucogia area of NE Greece. X-ray diffraction analyses of samples from three profiles of partially weathered gneisses have revealed that kaolinite becomes more abundant than halloysite with increasing int…
Abstract The reactivity and efficiency of five low molecular weight multifunctional anhydride and epoxy compounds as chemical modifiers of a bottle grade poly(ethylene terephthalate) (PET) resin were evaluated by reactive extrusion under controlled conditions. The two dianhydrides and the three epoxy compounds were us…
Abstract Summary: Monotype functionalizations with different types of functional groups (OH, NH 2 , COOH) on polypropylene and poly(tetrafluoroethylene) surfaces were synthesized using pulsed plasma‐initiated homo‐ or copolymerization of functional group‐carrying monomers. The maximum concentrations of functional grou…
Thermodynamic parameters of defects (presumably, defective SiO molecules) in the network of amorphous SiO2 are obtained by analyzing the viscosity of the melt with the use of the Doremus model. The best agreement between the experimental data on viscosity and the calculations is achieved when the enthalpy and entropy…
The microstructural evolution of nanocrystalline ceria produced by sol–gel has been analyzed as a function of the calcination temperature employing a novel nondestructive method based on the modeling of the whole X‐ray diffraction pattern. The results have been thoroughly verified by transmission electron microscopy.…
To study how oligomerization may contribute to the thermostability of archaeon proteins, we focused on a hexameric protein, protein L-isoaspartyl-O-methyltransferase from Sulfolobus tokodaii (StoPIMT). The crystal structure shows that StoPIMT has a distinctive hexameric structure composed of monomers consisting of two…
Reforming of ethanol in excess of water (1 to 8 molar ratio) has been investigated on Rh/CeO 2 , Rh/ZrO 2 and a series of Rh/CeO 2 –ZrO 2 (with Ce/Zr = 4, 2, and 1). XPS results indicate that the presence of Rh has resulted in partial reduction not only of CeO 2 but also of ZrO 2 (where the presence of XPS Zr 2+ lines…
Abstract Due to the importance of clay minerals in metal sorption, many studies have attempted to derive mechanistic models that describe adsorption processes. These models often include several different types of adsorption sites, including permanent charge sites and silanol and aluminol functional groups on the edge…