Abstract: Recent trends in the field of new developments demands key features like high sensitivity and high stability of the core like ‘Silicon’ as in various fields such as silicon chips using high silica technology, Silicon wafers, has all requisite semi-conducting properties, doping ,photoconductivity, junction formation etc.together can be named as “Silicon Valley”. Application of Silicon in the bio-physical engineering, as fibre optic sensors has drawn a lot of interest to researchers in the field of Science and technology. A sol is a dispersion of the solid particles (~ 0.1-1 mm) in a liquid.