Materials Literature
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We present a study of the effects of electron-beam irradiation on the Raman spectra and electronic transport properties of graphene and the operation of graphene field-effect transistors (GFET). Exposure to a 30 keV electronbeam causes negative shifts in the charge-neutral point (CNP) of the GFET, interpreted as due t…
This article reports on a comprehensive experimental study of 16 O + and 90 Zr + ion co-implanted SrTiO 3 (STO) single crystals. In this study, STO was used as a model material to simulate a waste form for disposal of radioactive 90 Sr that decays to 90 Y and subsequently to 90 Zr by emission of β – particles. Sequent…
Summary Nata is white gelatinous bacterial cellulose produced by Acetobacter aceti ssp . xylinum through fermentation of coconut water. Drying behaviour of nata de coco was conducted with a hot air dryer for a temperature range of 50–90 °C. The experimental data obtained were fitted into seven empirical and/or semi‐th…
Abstract The effect of chitosan (2 mg/ml) on the functionality of the plasma membrane of the Rhizopus stolonifer was studied. This study focuses on the changes in the integrity of the plasma membrane, external minimum medium pH, membrane potential, potassium efflux and determination of membrane phospholipids and prote…
A Xenon gas bubble introduced into a vertically suspended steel cylinder is driven to sonoluminescence by impacting the apparatus against a solid steel base. This produces a 150-ns flash of broadband light that exceeds 100-W peak intensity and has a spectral temperature of 10,200 K. This bubble system, which yields li…
Using pre-existing ZnO nanowires as lattice-matched templates, we have systematically studied the catalyst-free regrowth of ZnO nanostructures in a chemical vapor deposition (CVD) system. Because the templates (or crystal seeds) provided nanoscale preferential nucleation sites for the subsequent growth, changing ZnO s…
Abstract The influence of doping on the structural and optical characteristics of Ge 2 Sb 2 Te amorphous thin films has been determined with micro‐Raman scattering spectroscopy and a variable incident angle spectroscopic ellipsometer (VASE). The measured Raman spectra revealed the existence of two overlapping bands B2…
The current experimental methods are not able to reveal the actual processes of atomic movements during twinning and thus are incapable of clarifying the underlying mechanisms of annealing twinning, which are still not clear at present. We developed a method of molecular dynamics simulation to study the mechanism of a…
This article presents a computational model of the thermal bonding of nonwovens using convective hot air and its experimental validation. A computational fluid dynamics model based on the continuum modelling approach and the theory of porous media is developed to treat the flow behaviour and heat transfer within the t…
High-quality (0001)-oriented ZnO epitaxial films have been grown by pulsed laser deposition on Si(111) buffered with a nanometer-thick Gd 2 O 3 (Ga 2 O 3 ), GGO, layer. The structural characteristics of the ZnO epi-layers were studied by X-ray diffraction and transmission electron microscopy (TEM). The in-plane epitax…
Three-dimensional (3D) fibrous hydrogels were fabricated by blending two photoactive polymers, poly(ethylene glycol) diacrylate (PEGDA) and poly(vinyl alcohol) (PVA), and the resulting solution was electrospun. PEGDA is a commonly used hydrogel material for tissue engineering applications since its interaction with ce…
We report the strong magnetic field dependence of ferroelectric PbZr(0.52)Ti(0.48)O(3) (PZT) films on half-metallic oxide La(0.67)Sr(0.33)MnO(3) (LSMO) electrodes. As the field H is increased, the hysteresis loop first broadens (becomes lossy) and then disappears at approximately H = 0.34 T and ambient temperatures. T…
Cesium dihydrogen phosphate (CsH2PO4, CDP) and dodecaphosphotungstic acid (H3PW12O40·nH2O, WPA·nH2O) were mechanochemically milled to synthesize CDP–WPA composites. The ionic conductivities of these composites were measured by an ac impedance method under anhydrous conditions. Despite the synthesis temperatures being…
The corrosion inhibition performance of Neem leaf (Azadirachita indica) extract on the corrosion of mild steel test specimen immersed in 0.5 M HCl and H2SO4 acids respectively at the ambient temperature of 30°C and elevated temperature of 80°C was investigated. The experimental work was performed by the use of weight…
The spin-polarized transport properties of Fe atomic chain adsorbed on zigzag graphene nanoribbons (ZGNRs) are investigated using the density-functional theory in combination with the nonequilibrium Green's function method. We find that the Fe chain has drastic effects on spin-polarized transport properties of ZGNRs c…
Abstract A simplified model is developed to calculate the modulus of carbon black filled rubber compounds by using standard characterization data of the filler, its volume fraction and only one fitting parameter: the number of junctions between neighboring carbon black aggregates. The model is based on three hypothese…
A novel concept is presented for optimizing crystallization conditions, based on the principles of Genetic Algorithm stochastic optimization methods. This concept was tested with three model proteins as well as in a real problem situation involving crystallization of a DNA oligonucleotide and showed that initial micro…
Specific heat, magnetization and electron spin resonance (ESR) data obtained from a self-standing film of the doped plasticized polyaniline (PANI-DB3EPSA)(0.5) are shown. No long range magnetic order has been observed at zero magnetic field, above 2 K. For a magnetic field of 3.3 kOe applied perpendicular to the plane…
Abstract The polyamide 6/acrylonitrile‐butylene‐styrene copolymer (PA 6/ABS) blends were prepared using the twin‐screw extruder with ethylene‐acrylate‐glycidyl methacrylate copolymer (EAGMA) as the reactive compatibilizer. The structure, morphology, thermal, and mechanical properties of the blends were carefully inves…
Liquid‐feed flame spray pyrolysis (LF‐FSP) of mixtures of alumatrane [Al(OCH 2 CH 2 ) 3 N]/zinc acetate dihydrate [Zn(O 2 CCH 3 ) 2 ·2(H 2 O)] or zinc propionate [Zn(O 2 CCH 2 CH 3 ) 2 ]/aluminum acetylacetonate [Al(Acac) 3 ] dissolved in EtOH in known molar ratios can be used to combinatorially generate nanopowders a…