A technique for doping of porous films by surface adsorption of ions from aqueous solution is demonstrated. Fabrication of the films by use of the solgel technique gives a nanometer-scale porosity, which provides high doping levels and homogeneity. Doping through a masking layer patterned by photolithography is thus possible. With Pb as a dopant, lead silicate films with refractive indices of 1...

Nanocomposite of NiAl2O4/SiO2 (NAS) was prepared through insitu solgel reaction, in which NiAl2O4 nanocrystals were dispersed in the silica glassy matrix. The prepared dried NAS gel, at 338 K, was heat treated to different temperature and identified the temperature range (1083 – 1163 K) of the nanocomposite formation through XRD patterns. From XRD patterns, crystallite size of NiAl2O4 particles...

Magnetic powder of Sr-ferrite was prepared by conventional and sol-gel auto-combustion methods. In conventional method, strontium carbonate and ferric oxide powders were mixed together and then mixture was calcined. In sol-gel auto-combustion method, a solution containing strontium nitrate, ferric nitrate and citric acid was heated until the combustion took place automatically; then, as-burnt p...

In this work, the porous ceramic multilayer ultrafiltration membrane is developed. Macroporous support was formed by extrusion of paste derived from natural Moroccan Sahara Clay. The microporous interlayer then performed slip casting zirconia commercial powders and finally active toplayer obtained solgel route using TiO 2 sol. performance evaluated pores diameter, thickness top layer, water flu...

Zinc Oxide doped with chromium and cobalt, in form of powder with nanometer size has been prepared by typical solgel route, with assistance of microwave radiations. The as prepared material’s structure was characterized under XRays Diffraction(XRD) and Scherrer formula was used to find the crystal size. The materials also have been characterized under Scanning Electron Microscope(SEM) and Trans...

Double optical monitoring is applied to determine the influence of main process parameters on the formation of sulfated zirconia and self-assembled mesoporous silica solgel films by dip coating. In addition, we analyze, for the first time to the best of our knowledge, the influence of withdrawal speed, temperature, and relative humidity on refractive-index and physical thickness variations (unc...

Introduction. In addition to good biological properties, biomaterials should also possess appropriate physical properties in order provide stability and longevity at the place of application. The aim this work was evaluate an experimental nanostructured material based on calcium aluminate (CAL) silicate (CS). Material method. research used synthesized by hydrothermal solgel method from individu...

Fabrication and characterization of U-shaped fiber optic pH probes utilizing evanescent field absorption spectroscopy and dye doped solgel immobilization technology are presented. The U-shaped probe is used to increase the evanescent field in the film and hence its interaction with the dyes present in the film. The influences of bending radius of the probe and the numerical aperture of the fibe...