Materials Literature
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Photonic antenna: Ru-based stopcocks are electrostatically bound to the negatively charged one-dimensional channels of zeolite L crystals (see figure). The authors show that the quenching of the luminescence of the stopcock molecule is much weaker when it is bound to zeolite L.
ZnO–SnO 2 films were deposited onto glass substrates by filtered vacuum arc deposition. The source was equipped with a 70 at% Zn and 30 at% Sn cathode that was the source of Zn and Sn ion beam. Arc current was 200–300 A. The oxygen background pressure was 4–8 mTorr. The deposition time was 60 or 120 s, resulting in fi…
A study of the temperature dependence of the electron beam induced deposition (EBID) of tungsten was carried out in a temperature range of −30–75°C under two conditions of beam energy and beam current using WF6 as the precursor gas. An Arrhenius relationship was found for the temperature dependence of the deposition r…
Abstract A facile, self‐sacrificing template route has been developed to synthesize spinel M II In 2 S 4 (M II = Mn, Zn, Cd, Fe, Co, Ni) and M I In 5 S 8 (M I = Cu, Ag) porous microspheres. The BET surface areas of the products are around 70 m 2 g –1 . The urchin‐like In 2.77 S 4 microspheres precursor acts as both st…
Amorphous films with compositions (As0.33S0.67)100−xTex (x = 0, 1, 5 and 10 at.%) and GexSb40−xS60 (x = 10, 20 and 30 at.%) have been prepared by thermal evaporation. The compositional dependences of their optical properties, with increasing Te and Ge content, respectively, are explained in terms of the modifications…
Electromagnetic wave absorption properties of carbon powder from catalysed carbon black in X and Ku bands, Wen, Bin, Zhao, Jijun, Duan, Yuping, Zhang, Xingguo, Zhao, Yanbo, Dong, Chuang, Liu, Shunhua, Li, Tingju
Nanocrystalline p-type arsenic-doped ZnO (ZnO:As) films have been synthesized on (0001) sapphire substrates by pulsed laser deposition using a ZnO target mixed with 6.6wt% As2O3. The process of synthesizing p-type ZnO:As films was performed in an ambient gas of ultrapure (<99.99%) oxygen. The ambient gas pressu…
This paper describes the concentration dependences of piezoelectric coefficients, squared figures of merit and electromechanical coupling factors which have been calculated for 1–3 and 1–0–3 piezo-active composites based on single crystals of relaxor-ferroelectric solid solutions of (1 − x )Pb( A 1/3 Nb 2/3 )O 3 – x P…
ZnS : Mn nanophosphor has been doped with quencher impurity Ni using the colloidal precipitation method with capping agent polyvinylpyrrolidone. The formation of ~2.5 nm sized nanoparticles has been confirmed by x-ray diffraction and transmission electron microscope studies. Energy and time resolved photoluminescence…
Abstract The aim of this work is to investigate the effect of the molecular structure of polyethylene on the crystallization kinetics. In static conditions, the increase of the degree of branching leads to the decrease of the crystallization temperature, the melting temperature, and the crystallinity. Indeed, the crys…
Abstract Poly(diethylene terephthalate‐ co ‐thiodiethylene terephthalate) (PDET/TDET) copolymers of various compositions were synthesized and characterized in terms of chemical structure and molecular weight. The thermal behavior was examined by thermogravimetric analysis and differential scanning calorimetry. All the…
To solve the problem of the large environmental burden in the disposal of FRP (Fibre Reinforced Plastics), natural fibre and biodegradable resin have received a lot of attention as easily degradable materials in the natural environment. To enlarge the usage of the composites based on natural fibre and biodegradable re…
Complementary electron microscopy techniques that provide local information about structural, electronic and magnetic properties have been used to study thin films of Zn 0.85 Co 0.15 O grown on Si 3 N 4 buffered (100) Si substrates at 673 K. No evidence of secondary phases at interfaces was found. For this growth temp…
The electrical properties of crosslinked polyethylene (XLPE), employed in mid-voltage cable insulation are studied using thermally stimulated depolarization currents (TSDC), differential scanning calorimetry (DSC) and x-ray diffraction. A complex heteropolar peak appears by TSDC between 50 and 110 °C, with a maximum a…
The S(2) state properties of Sb-tetraphenylporphyrin (SbTPP) derivatives were investigated using subpicosecond spectroscopic methods. The S(2) fluorescence of various SbTPP derivatives was observed for the first time. It was revealed that the S(2) fluorescence lifetime changed depending on the donor-ability of the lig…
A novel noncentric three-dimensional network Cd 3 (NCS) 6 (pzmo) 2 ( 1 ) (pzmo = pyrazine-monoxide) with complicated topology has been designed and synthesized based on an asymmetric ligand pzmo in aqueous solution. The second-order nonlinear optical property measurement gives a second harmonic generation efficiency,…
Well protected: Porphyrins act as a molecular cap (see picture) to selectively stabilize a non-self-complementary non-Watson–Crick DNA structure through additional hydrophobic interactions. At the same time, these porphyrins serve as an efficient internal sensor of the newly formed secondary structure.
Abstract Structural prediction and IR‐characteristic bands assignment of arginine‐containing tri‐ and tetrapeptides glycyl‐glycyl‐arginine ( GGArg ) and glycyl‐glycyl‐arginyl‐alanine ( GGArgAla ) have been carried out, using linear‐dichroic infrared (IR–LD) spectroscopy of oriented solid‐samples in a nematic liquid cr…
Sol–gel derived, as-deposited amorphous tungsten oxide (WO3) films become nanocrystalline with a pseudocubic triclinic structure upon annealing at 600 °C. The annealed films are constituted of nanorods along with interconnected nanoparticles and pores. While the high transmission modulation and colouration efficiency…
A highly sensitive thermoluminescence (TL) phosphor based on Ba1−xCaxSO4 : Eu (0 ≤ x ≤ 1) has been prepared using the chemical co-precipitation technique. It has been found that the TL sensitivity of the material changes on varying the value of x with the maximum coming at x = 0.03. For this value of x the sensitivity…