Materials Literature
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A large improvement of the effective lifetime of n-type phosphorus doped multicrystalline silicon to reach 950 μs has been realized by combining both two step phosphorus treatments and surface oxidation. The average lifetime increases after the phosphorus diffusion process is mainly attributed to the remove of killer…
The relaxation of vibrational energy in the H and D stretch modes has been studied on the graphene surface using ab initio calculations. The dissipation of the vibrational energy stored in the stretching modes proceeds through vibration-phonon coupling, while the dissipation through electronic excitations makes only m…
This article reports on the optical properties of Er3+ ions doped CdO-Bi2O3-B2O3 (CdBiB) glasses. The materials were characterized by optical absorption and emission spectra. By using Judd-Ofelt theory, the intensity parameters Ω(λ) (λ = 2, 4, 6) and also oscillatory strengths were calculated from the absorption spect…
To investigate the phenomena that occur at the growth temperatures, an MOVPE (metalorganic vapor phase epitaxy) growth system was installed in the X-ray diffractometer of the laboratory level. The present MOVPE system is capable of growing GaN and related materials that are advanced in the device applications but very…
Quick x-ray reflectivity (QXRR) is a new surface examination technique for studying fast processes at the surface and interface of the materials on a nano-scale. The currently available models for classical scanning-type x-ray reflectivity cannot be applied directly to the QXRR simulations. The present article propose…
By introducing artificial pinning sites to locally modify coercivity in perpendicularly magnetized TbFeCo wires, strip domains were constructed without expense of specimen damage. The construction of strip domains with well-defined shape and controllable number enables a determination of magneto-resistance contributin…
Besides the European Union (EU) Directive on Registration, Evaluation, Authorization and Restriction of CHemicals (REACH), the EU Water Framework Directive (WFD) is probably the single most important piece of environmental legislation in Europe when it comes to dealing with nanomaterials in the future given their wide…
The Nb3Sn volume, crystallite size, and Sn content evolution during the reaction of a recent high critical current density Nb3Sn/Cu composite wire has been monitored by high energy, high resolution synchrotron x-ray diffraction. Thanks to the high flux of high energy x-rays at the ID15A beamline of the European Synchr…
The processing of solids, such as crystals, is strongly influenced by the surface properties of the material. In recent years the pharmaceutical industry has shown great interest in identifying, or chemically speciating, the molecular components of crystal faces. Formerly, characterization of the molecular identity of…
Electrodes made of organic polymers bearing redox-active radical pendant groups have attractive features for use in rechargeable batteries. Electronic structure and electrochemical properties of cathode- and anode-active organic polymers are investigated here by means of first-principles calculations performed in the…
Point-contact (PC) investigations on the title compound in the normal and superconducting (SC) state (${T}_{\mathrm{c}}\ensuremath{\simeq}10.6$ K) are presented. The temperature dependence of the SC gap of TmNi${}_{2}$B${}_{2}$C determined from Andreev-reflection (AR) spectra using the standard single-gap approximatio…
Effects of curcumin, a major constituent of turmeric, on ecto-nucleotidases have not been clarified. Here, we investigated whether curcumin affects ecto-nucleotidase activities in human hepatocellular carcinoma HepG2 cells. In the cells, high levels of Mg(2+)-dependent activity of ecto-nucleotidases were observed in t…
Abstract A photosensitizer-Eosin and a reductant-D-Xylose were used in the photogalvanic cell for photochemical conversion of solar energy into electrical energy. The generated photopotential and photocurrent were 825.0 mV and 250.0 μA, respectively, whereas maximum power of the cell was 206.25 μW. The observed power…
The ferromagnetic properties of erbium-doped GaN (GaN:Er) epilayers grown by metal-organic chemical vapor deposition were studied. It is found that the different tensile strains produced by the respective lattice mismatch for different substrates used (GaN/Al2O3, AlN/Al2O3, GaN/Si (111), and c-GaN bulk) correlate well…
Recently we showed how crystallization in microemulsions could lead directly to the most stable polymorph, thereby leapfrogging Ostwald’s rule of stages. Here we consider in more details the crystallization of mefenamic acid from dimethylformamide microemulsions. Crystallization of mefenamic acid from bulk DMF has pre…
The corrosion behaviours of austenitic stainless steels were investigated by electrochemical methods under plastic deformation with constant strain in the naturally aerated 0.5 M H 2 SO 4 + 0.2 M KCl solution at room temperature. The work addresses the influence of plastic deformation and molybdenum element on the cor…
Culturing cells in a three dimensional hydrogel environment is an important technique for developing constructs for tissue engineering as well as studying cellular responses under various culture conditions in vitro. The three dimensional environment more closely mimics what the cells observe in vivo due to the applic…
The preparation and structural characterization of a family of viscoelastic dispersions of borate cross-linked, 80% hydrolyzed poly(vinyl acetate) (80PVAc) in aqueous–organic liquids are presented. Correlations between mechanical properties (from rheological measurements) and the degree and nature of cross-linking (fr…
Using ab-initio density functional theory the electronic response is studied for graphene subjected to an external superlattice potential. Different potential strengths and crystallographic directions forming one-dimensional (1D) superlattices with zigzag and armchair edges are investigated. The graphene band structur…
Dendrigraft poly(ϵ-caprolactone)s with high molecular weight and narrow polydispersity are synthesized via a convenient generation-growth approach. Copolymerization of ϵ-caprolactone (CL) and 4-(2-benzoxyethoxy)-ϵ-caprolactone (BECL) with stannous octanoate as a catalyst affords a functionalized poly(ϵ-caprolactone) (…