Materials Literature
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We report on an approach for photopyroelectric calorimetry enabling a frequency dependence detection of the specific heat and of the latent heat exchanged over first order transitions. It has been applied to the nematic-isotropic transition of 4-n-octyl-4′-cyanobiphenyl liquid crystal confined in a silica nanoparticle…
Electronic phase diagram has been derived for the Prussian-Blue-type cyano-bridged transition-metal compound, ${\text{Na}}_{0.84\ensuremath{-}\ensuremath{\delta}}\text{Co}{[\text{Fe}{(\text{CN})}_{6}]}_{0.71}\ensuremath{\cdot}3.8{\text{H}}_{2}\text{O}$ $(0.0\ensuremath{\le}\ensuremath{\delta}\ensuremath{\le}0.61)$, as…
Diamagnetic susceptibility measurements under high hydrostatic pressure (up to 1.03 GPa) were carried out on a newly discovered Fe-based superconductor LaO 1- x F x FeAs ( x =0.11). The transition temperature T C , defined as a point at the maximum slope of superconducting transition, was enhanced almost linearly by h…
Abstract Poughite Fe 2 3+ SO 4 (TeO 3 ) 2 ·3H 2 O, a multi‐anion mineral containing both tellurite and sulfate units has been studied by Raman spectroscopy. Raman bands at 655 cm −1 is attributed to (TeO 3 ) 2− stretching bands. The intense sharp Raman band at 1026 cm −1 is assigned to the ν 1 (SO 4 ) 2− symmetric str…
Abstract The process of hydrogen chemical adsorption on platinum cluster/single wall carbon nanotube (CNT) join surfaces is modelled at various temperatures and pressures. For that, the adsorption energy of hydrogen atoms on surfaces of both platinum (111) plate and CNT (5,5) or (8,8) types is calculated by density fu…
To improve the quantum efficiency from silicon nanocrystals, a structure with Ag∕Ag-poor cermet layers is proposed. Due to large permittivity of Ag-poor cermet and its dispersion characteristic, density of states can be enhanced at the energy much lower than the plasmon energy of Ag. By properly choosing the component…
Thin films of ilmenite-hematite solid solution 0.6FeTiO3⋅0.4Fe2O3 were prepared on α-Al2O3 (001) and (110) single-crystalline substrates. The oxide phases formed in the thin films strongly depended on the oxygen partial pressure (PO2) during deposition. At PO2=1.3×10−3Pa, regardless of thesubstrate orientation, well-o…
Mesoporous silicates (MPS) provide a means of immobilizing proteins and enzymes in a stable environment while retaining physiological function. A systematic methodology of assessing the potential of immobilising a given protein on to MPS has been developed from extensive characterization of the surface properties of t…
Film formation: Polymer-assisted deposition allows the growth of nanocomposite thin films comprising amorphous silica nanoparticles embedded in epitaxial SrTiO3 and CoFe2O4 matrices (see picture). These silica nanoparticles can be as small as 10 nm and become larger with increasing post annealing temperature. The inco…
Abstract— Liquid crystals have been extensively employed in photonic devices, especially in current flat‐panel displays. Demands on high‐quality electro‐optical performance of liquid‐crystal displays have continued to impel delicate molecular designs, chemical syntheses, as well as advanced cell‐manufacturing processe…
Abstract Novel polyphosphazene nanotubes with closed ends were prepared by polycondensation of HCCP and BPS via an in situ template approach at room temperature. The nanotubes were characterized by FT‐IR and NMR spectroscopy and elemental analysis. Their cross‐linked structures were confirmed. SEM and TEM indicated th…
Abstract— Efficient near‐infrared (NIR) quantum cutting (QC) through cooperative downconversion in Y 3 Al 5 O 12 : RE 3+ ,Yb 3+ (RE = Tb, Tm, and Pr) nanophosphors has been demonstrated, which involves the conversion of the visible photon from RE 3+ into the NIR emission of Yb 3+ with the optimal quantum efficiency ap…
Lead lanthanum zirconate titanate (PLZT) thin films were directly deposited on copper substrates by chemical solution deposition and crystallized at temperatures of ⩾650°C under low pO2 conditions. Although the crystallization conditions used are conducive for copper oxidation, a thin layer (∼115nm) of PLZT was suffic…
It is widely believed that in BaTiO3, Ba2+ cations are much more mobile than Ti4+ cations. Under a dc electric field, Ba cations are therefore expected at elevated temperatures to move at a faster rate to the cathode, leading to compositional demixing and eventually to decomposition of the BaTiO3. We have found that t…
The effects of tensile or compressive prestress on the torsional responses of carbon nanotubes are examined using classical molecular dynamics simulations. Prestressing the nanotubes is predicted to significantly change their critical torsional moment and stiffness. This is therefore an approach by which the torsional…
Gelungener C(o)up: Cu2P20 und Cu5InP16 wurden durch eine Mineralisationsreaktion aus den Elementen und binären Ausgangsmaterialien synthetisiert. Cu2P20 ist das erste binäre Polyphosphid, bei dem das Röhrenmotiv des violetten und faserförmigen Phosphors in vollständiger Form erhalten bleibt (siehe Bild). Cu5InP16 weis…
We studied the effects of multi- and single-target liposomal drugs on human gastric cancer cell AGS both in vitro and in vivo. The cytotoxic effect of dihydrotanshinone I was significantly enhanced by treatment with octreotide-polyethylene glycol(PEG)-liposome, Arg-Gly-Asp(RGD)-PEG-liposome, and RGD/octreotide-PEG-lip…
Abstract Optically active nanostructures comprised of polymer multilayer microspheres surrounding semiconductor quantum dots are studied. Comparative analysis of the optical properties of the microspheres with four alternating layers with different refractive indices is performed. Photoluminescence and extinction char…
The magnetic properties of three epitaxial La 0.7 Sr 0.3 MnO 3 films of thickness 5, 15 and 40 nm grown on SrTiO 3 (001) substrates were investigated. The structural transition of the SrTiO 3 substrate induces a magnetic transition in the manganite films due to magnetoelastic coupling. Below the temperature of the str…
The authors present a mechanism explaining complex diffraction efficiency dynamics of the holographic grating recording process in azobenzene-functionalized polymer. The mechanism assumes simultaneous formation of three coupling phase gratings with different recording time constants and constant, equal to 0 or π, phas…