Materials Literature
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The evaluation of the possibilities to use coal-tar pitch modified with waste poly(ethylene terephthalate) or phenol–formaldehyde resin for the preparation of activated carbons was carried out. The measurement of thermal analysis (DSC), softening point, coking value, content of components insoluble in toluene and quin…
Two series of perpendicular exchange coupled composites (ECC) films are prepared by dc magnetron sputtering, FePt(5)/[Co(0.2)/Pt(0.3)]N (ECC-I-N) and FePt(5)/[Co(0.2)/Pt(0.6)]N (ECC-II-N), respectively. Structure analyses reveal the epitaxial growth on (001) oriented L10 FePt island-like grains of [Co/Pt]N with (200)…
Organic–inorganic hybrid polyaspartimide polymers were synthesized via Michael addition by using octa(aminophenyl)silsesquioxane (OAPS) (2.5–30 wt %), leading to a family of porous polymers. The formation of NH structure during Michael addition assists in CO2 capture. The CO2 capture capacity increased with increasin…
Electrical properties of Nb-doped titanium oxide films were evaluated with respect to annealing temperatures. Although an amorphous phase is preserved up to 450 °C, x-ray absorption spectroscopy analyses indicate that crystal field splitting in the conduction band begins to take place at this temperature. Such molecul…
We demonstrate single-electron pumping in a gate-defined carbon nanotube double quantum dot. By periodic modulation of the potentials of the two quantum dots, we move the system around charge triple points and transport exactly one electron or hole per cycle. We investigate the pumping as a function of the modulation…
The response of the electrostatic potential distribution within a metal-oxide-semiconductor field-effect transistor (MOSFET) to an external electric field was revealed using electron holography cross-sectional in-situ observation while applying the gate voltage to a transistor scaled down to a 25-nm gate length. Charg…
The polymerase chain reaction (PCR) method is widely used for the reproduction and amplification of specific DNA segments, and a novel PCR method using nanomaterials such as gold nanoparticles has recently been reported. This paper reports on the effects of superparamagnetic nanoparticles on PCR amplification without…
We report electron transmission and Raman spectroscopy study of InAs nanowires. We demonstrate that the temperature dependent behavior of optical phonon energies can be used to determine the relative wurtzite fraction in the InAs nanowires. Furthermore, we propose that the interfacial strain between zincblende and wur…
Ion-driven anisotropic etching, i.e. (a) ion-enhanced chemical etching or (b) physical sputtering or (c) ion-beam sputtering, under simultaneous deposition of etch-inhibitors (e.g. impurities coming from the sample surroundings, reactor walls or the plasma bulk) can induce roughness and may also lead to the formation…
Ascorbic acid is one of the antioxidant compounds widely used against free radical stress. The present study was undertaken to examine whether ascorbic acid and hydrogen peroxide (H2O2), alone or in combination, could influence cell viability. The murine neuroblastoma cell line, N2a, was used to perform a dose respons…
Nickel modified carbon fibre electrodes were prepared by electrochemical oxidation and partial reduction of a graphite fibre electrode with a slow linear potential sweep in 97% H 2 SO 4 solution followed by impregnation & ionexchange with Ni +2 species. The cyclic voltammetry of the modified electrode in an alkaline m…
Abstract The biocompatibility, morphology, and mechanical thermal properties of composite materials composed of maleic anhydride‐grafted polylactide (PLA‐g‐MA) and cellulose acetate (CA) were evaluated. Composites containing maleic anhydride‐grafted PLA (PLA‐g‐MA/CA) exhibited noticeably superior mechanical properties…
Highly ionized discharge for physical vapor deposition at very low pressure is presented in the paper. The discharge is generated by electron cyclotron wave resonance (ECWR) which assists with ignition of high power impulse magnetron sputtering (HiPIMS) discharge. The magnetron gun (with Ti target) was built into the…
We demonstrate improved switching uniformity in resistive random-access memory (RRAM) containing metal-doped electrolyte due to thermally agglomerated metallic filaments. Rapid thermal annealing (RTA) produced copper-doped carbon (CuC) devices that exhibited better switching parameters, such as on/off resistance and s…
PURPOSE: The aim of the work is to study the crystallization of efavirenz to understand the preferential formation of various polymorphic forms, to establish their identity, to study the transformation between the polymorphic forms on heating and to determine their free energy. METHODS: Slow crystallization from diffe…
The technologically important exchange coupling in antiferromagnetic/ferromagnetic bilayers is investigated for embedded nanostructures defined in a LaFeO(3)/La(0.7)Sr(0.3)MnO(3) bilayer. Exploiting the element specificity of soft X-ray spectromicroscopy, we selectively probe the magnetic order in the two layers. A tr…
The magnetic ground state of CeRhGe${}_{3}$ has been investigated using magnetic susceptibility, heat capacity, neutron diffraction, muon spin relaxation (\ensuremath{\mu}SR), and inelastic neutron scattering (INS) techniques. Our \ensuremath{\mu}SR study clearly reveals the presence of two frequencies below T${}_{\ma…
Two three-strand coordination polymers [Ln2(m-BDC)3(MOPIP)2 · H2O] n [Ln = Sm (1), Nd (2)] have been synthesized by hydrothermal reaction of lanthanide chloride with benzene-1,3-dicarboxylic acid and 2-(4-methoxyphenyl)-1H-imidazo[4,5-f][1,10]phenanthroline (MOPIP). The crystal structures of the complexes are zipper-l…
Photoluminescence (PL) of a strain-compensated Ge/Si0.15Ge0.85 multiple-quantum-well (MQW) structure was studied above room temperature, in the range of 300–440 K. Both direct and indirect radiative recombination PL features were observed. The relative intensity of direct to indirect recombination markedly increases w…
We have observed large second-order nonlinear optical and vibrational circular dichroism (VCD) responses in a charge-transfer-type L-Histidinium salt. Using X-ray Diffraction, VCD spectroscopy, and time-dependent density functional theory to characterize the compound, we employ a two-level model to explain and quantif…