We report on the photoconductive response of nanostructured sol-gel films in function of the silver nitrate concentration (ions and colloids). Silver colloids were obtained by spontaneous reduction process of Ag+ ions to Ag(0). 2-d hexagonal nanosructured sol-gel thin films were prepared by dip-coating method using the non-ionic diblock copolymer Brij58 to produce channels into the film, which ...

An optical fiber sensing system, for monitoring oxygen aiming in vivo nuclear magnetic resonance (NMR) applications is presented. Oxygen detection is based on the dynamic quenching of the fluorescence of a ruthenium complex trapped in the porous structure of a sol–gel silica film. Oxygen concentration is determined by phase-modulation fluorometry. Preliminary results concerning the characteriza...

A sensitive interference refractive index sensor based on composite optical waveguide (COWG) was developed. Sol-gel technique used to prepare TiO2 sol, and the film fixed surface of single-mode potassium ion-exchange (PIE) (OWG) by dip-coating annealing treatment fabricate an device. The between zeroth-order transverse electric (TE0) magnetic (TM0) modes laser beam which transport in COWG cause...

We report on the effect of dopant concentration and substrate temperature on the electrical, optical and structural propertie of In-doped ZnO thin films via sol-gel method using spin coating technique to tackle the problem of high instrumental costs for film deposition. In particular, the effect of In dopant concentration will study at wide range (from 1% up to 10%) by using spin coating techni...

the synthesis of titania via sol-gel method has been widely studied. in the present work, titania was deposited onto a titanium substrate via sol-gel method. different processing parameters such as the repetition number of dipping/heat treatment process and dipping time have been studied to obtain the homogenous titania coating. phase and microstructural evaluation of the powder and coating sam...

This thesis considers a nanotechnology approach based on the production of metals pre-treatments and organic coatings (a complete protection system at all) designed from the nanoscale. The final aim is to develop protection systems with improved corrosion protection properties and a low environmental impact. In particular, multifunctional silane hybrid molecules were used to design sol-gel pre-...