Materials Literature
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In addition to the classic methods of structural biology--X-ray crystallography and NMR--solution X-ray scattering (SAXS) is playing an increasingly important role in structural investigation of biological macromolecules. However, the simultaneous ease of SAXS data collection and sophistication of its data analysis to…
We report room temperature electronic and thermoelectric properties of Si-doped In0.52Ga0.48BiyAs1−y with varying Bi concentrations. These films were grown epitaxially on a semi-insulating InP substrate by molecular beam epitaxy. We show that low Bi concentrations are optimal in improving the conductivity, Seebeck coe…
The thermal conductance for a series of metal-graphite interfaces has been experimentally measured with time-domain thermoreflectance (TDTR). For metals with Debye temperatures up to ∼400 K, a linear relationship exists with the thermal conductance values. For metals with Debye temperatures in excess of ∼400 K, the me…
Polyols were synthesized from castor oil with diethanolamine and triethanolamine at the molar ratios from 1:1 M to 1:3 M with the total hydroxyl value and amino value in the range from 291 to 512 mg KOH/g. Bio-based rigid polyurethane foams with good mechanical properties, a high closed-cell content and the renewable…
PURPOSE: Liposomes have been proposed to be a means of selectively targeting cancer sites for diagnostic and therapeutic applications. The focus of this work was the evaluation of radiolabeled PEGylated liposomes derivatized with varying amounts of a cyclic arginyl-glycyl-aspartic acid (RGD) peptide. RGD peptides are…
Electrically conductive cotton, polyester and nylon fabrics have been prepared from conductive polyaniline (PANI) polymer by in situ chemical oxidative polymerization of aniline using ammonium persulphate as the oxidant by a process of diffusion polymerization in a mixed bath. These fabrics are then characterized by A…
Clay minerals are still often considered as stable in soils over a century to millennium time scale despite a few examples of rapid evolution. Indeed, recent advances in X-ray diffraction pattern treatment combined with studies of soil sequences, demonstrated that changes in clay mineralogy were faster than commonly t…
Superparamagnetic ZnFe2O4 nanoparticles with size range of 28-38 nm were synthesized by polyol process based on use of varying chain length glycols as solvent. We have offered, for the first time, the plausible mechanism behind in situ formation of zinc ferric oxalate hydroxide hydrate [Fe2Zn(C2O4)2(OH)3](+)·4H2O comp…
Solution-blown soy protein/nylon 6 nanofibers, 40/60 and 50/50 wt/wt %, were collected on a rotating aluminum drum in order to form a mat. The collected fiber mats were bonded both chemically (using aldehydes and ionic cross-linkers) and physically (by means of wet and thermal treatment) to increase the tensile streng…
Dependences of the erbium photoluminescence intensity in Si:Er/Si structures have been studied in cases of homogeneous (over the sample surface) and inhomogeneous optical excitation. It is shown that the excitation mode strongly affects the type of the dependences obtained. A method for determining the excitation cros…
Nanoporous coatings have become the subject of intense investigation, in part because they have been shown to have unique and tailorable physical properties that can depart greatly from their dense or macroscopic counterparts. Nanoporous coatings are frequently fabricated utilizing oblique-angle or glancing-angle phys…
The temperature dependence of the conductance of a suspended carbon nanotube, as probed by means of a scanning tunneling microscope (STM) tip, is analyzed. Employing the theory of coupling between electronic and vibronic degrees of freedom, local linear and nonlinear transport features are studied as a function of tem…
To synthesize Au nanorods without the use of seed crystals, we applied gamma-ray irradiation from 60 Co radioactive source to reduce aqueous solution containing Au ions. The total dose was fixed to 6.0 kGy with various dose rates from 0.4 to 13.6 kGy/h. After the irradiation, two surface plasmon bands in the range aro…
We have demonstrated a facile protocol for synthesizing CuO and Cu2O mixed-phase nanostructures by anodization of copper hydroxide (Cu(OH)2) nanoneedles and their heat treatment in different atmospheres, which affect photocatalytic degradation efficiency. The oxygen annealed sample had relatively small (100 nm) lamell…
Separation and recovery of tetramethyl ammonium hydroxide (TMAH) was investigated using several types of MCM-41 (mesoporous silica having hexagonal structure) adsorbents. The MCM-41s were prepared by hydrothermal synthesis with structure-directing agents with different alkyl chains. The prepared MCM-41s were character…
Poly(L-lactic acid) (PLLA)/polyurethane (PU)-blend films were prepared by casting the polymer blend solution in chloroform. Surface morphologies of the PLLA/PU-blend films were investigated by scanning electron microscopy (SEM). Thermal, mechanical, and chemical properties of PLLA/PU-blend films were studied by differ…
The last decade has witnessed enormous improvement in the area of nanofillers on electrical, thermal and mechanical properties of polymeric materials. The dielectric and thermal properties of standard enamel and various nanofiller mixed enamel were detailed and analyzed. Nanopowders of ZrO 2 , Al 2 O 3 , CNT and ZnO w…
The permanent photoinduced valence manipulation of samarium doped oxyfluoroborate glasses as a function of γ-ray irradiation has been investigated using a steady-state fluorescence and electron paramagnetic resonance techniques. An increase in SrF2 content in the glass led to the red shift of the peaks in as prepared…
A calculation method for accurately computing the displacement, image stress, and image energy induced by defects, such as cavities, precipitates, finite dislocation segments, and dislocation loops, in a free-standing anisotropic thin crystal film is presented. The anisotropic image stress is derived in the Fourier sp…
In the article the cooperative energy transfer in GeO2GaOBaO glass system doped with Yb 3+ /Tb 3+ under 980 nm laser diode excitation was investigated. The inuence of Tb 3+ concentration on the luminescent properties was determined. Measured strong luminescence at 489, 543, 586, 621 corresponds to 5 D4 7 FJ (J = 6, 4,…