Uniform arrays of nano-sized pore produced in porous alumina were transferred into InP substrates by inductively coupled plasma reactive ion etching (ICP-RIE). We observed a significant enhancement in the light output from InP substrate with nanohole arrays on the surface. Photoluminescence intensity of triangular arrays of air cylinders on InP substrate showed an enhancement up to 3 times comp...

A method for the degradation of pyrrolidine in water is described. The method relaies on the photocatalytic degradation of pyrrolidine to CO2 and NH3 by UV irradiation and using titanium dixide semiconductor as a photocatalyst. Compared with direct photolysis, the semiconductor catalytic photolysis gave consistently higher degradation yields for pyrrolidine in water. T...

We report the development of different types of oxygen sensors based on yittria-stabilized zirconia (YSZ) as a solid electrolyte. The conventional oxygen sensor is a concentration cell with two porous Pt electrodes, one of which is exposed to air as a constant (reference) oxygen concentration and the other is exposed to automobile exhaust gas of variable oxygen concentration, depending on the a...

Halide perovskite colloidal nanocrystals have recently gained much attention thanks to their superior stability compared with bulk counterpart and unique optical properties. In this paper, two systems combining nanoporous gold are studied create an optimal metal semiconductor heterojunction that can be used in photocatalysis photovoltaic devices. The degradation phenomenon is observed when the ...

ZnO thin films were successfully deposited via spray pyrolysis technique over various substrates, including glass, silicon, and mesoporous silicon (PSi). The effect of substrate type on the surface morphological, structural, electrical properties film was investigated. Scanning Electron Microscopy confirms morphology meso-PSi displays morphologies ZnO. (ZnO/PSi) heterojunction shows a porous la...

JOSÉ J. CUERVO, 1 * ANDERS P. MØLLER 2 & FLORENTINO DE LOPE 3 1 Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, Calle General Segura 1, E-04001 Almería, Spain 2 Laboratoire de Parasitologie Evolutive, CNRS UMR 7103, Université Pierre et Marie Curie, 7 quai St. Bernard, Case 237, F-75252 Paris Cedex 05, France 3 Departamento de Ciencias Morfológicas y Biol...

In this work, we foresee the structure of a new class borophenes with smaller two-dimensional (2D) densities atoms than those explored so far for 2D boron crystals. Boron in porous tend to be five-coordinated contrast commonly investigated structures hexagonal holes which number nearest neighbors each atom varies from three six. High metallic character is usual feature borophenes, however, have...

Photocatalytic degradation of toxic organic compound in water, soil and air by semiconductor catalysts such as TiO2 and ZnO have received much attention over the last two decades. However, the low quantum yield, easy agglomeration and difficult post-separation of these inorganic catalysts limit their application for large-scale applications. Metal-organic frameworks (MOFs) are the latest class ...