Cu2O is a narrow band gap material serving as an important candidate for photoelectrochemical hydrogen evolution reaction. However, the main challenge that hinders its practical exploitation poor photostability, due to oxidation into CuO by photoexcited holes. Here, we thoroughly minimize photo-oxidation of nanowires growing thin layer TiO2 protective and amorphous VOx cocatalyst using magnetro...

The application of high-temperature YBa2Cu3O7−δ (YBCO) superconducting material is a considerable prospect for the growing energy shortages. Here, SmBiO3 (SBO) films were deposited on (100)-orientated yttrium-stabilized zirconia (YSZ) simple crystal substrates via the chemical solution deposition (CSD) approach for coated conductors, and the effects of sintering oxygen partial pressure on SBO f...

A disubstituted quaterpyridine based cobalt complex non-covalently tethered to multiwalled carbon nanotube (MWCNT) substrate, forming a hybrid catalyst, Co-qpyCOOH/CNT, catalyzed the conversion of CO2 CO under aqueous conditions. At an optimal and uniform loading, it exhibited remarkable catalytic activity, near-exclusive selectivity, high stability towards formation CO. mere cathodic potential...

In this study, a mechanical stacking technique has been used to bond together the GaInP/GaAs and poly-silicon (Si) solar wafers. A GaInP/GaAs/poly-Si triple-junction cell mechanically stacked using low-temperature bonding process which involves micro metal balls on line high-optical-transmission spin-coated glue material. Current–voltage measurements of cells have carried out at room temperatur...

We report transparent quantum dot light-emitting diodes with a current focusing structure. By depositing SiO2 thin film to form the structure, DC density and luminance significantly increased over 8700 mA/cm2 360 000 cd/m2, respectively. The emission spectra densities as functions of thickness aperture width have been investigated discussed. This design is proved effective can be further applie...

INTRODUCTION The objective of this study was to establish the normal bone mineral density (BMD) reference curve for the Asian Singapore male. MATERIALS AND METHODS Three hundred and eighty-three male subjects were enrolled; comprising of 309 Chinese, 44 Malays and 30 Indians resident in Singapore. Bone mineral density was measured at the lumbar spine and left hip using a Hologic QDR 4500 Elit...

In this work, porous-silicon samples were prepared by electrochemical etching on p-type (B-doped) Silicon (Si) wafers. Hydrofluoric acid (HF)-ethanol (C2H5OH) [HF:Et] and Hydrofluoric acid (HF)-dimethylformamide (DMF-C3H7NO) [HF:DMF] solution concentrations were varied between [1:2]-[1:3] and [1:7]-[1:9], respectively. Effects of synthesis parameters, like current density, solution concentratio...

PURPOSE To determine the human corneal threshold ablation energy density for the 193-nm ArF excimer laser, approximating clinical conditions. METHODS The VISX Star (Santa Clara, CA) 193-nm argon fluoride excimer laser was used to ablate the cornea in human eye bank eyes under clinical conditions. Corneas were exposed to energy densities of 10, 20, 30, 35, 40, 45, and 140 to 160 mJ/cm2. Cornea...

In this work, we study the features of discharge a magnetron with cold molybdenum target in an argon environment using Langmuir probe. The novelty work is due to placement probe near anode. I-V characteristics were measured range current densities 27–96 mA/cm2 at pressures 2 – 4 mTorr. experimental used calculate electron temperature, ion and density. It was found that density charge carriers i...