Mercury is a serious neurotoxic agent, and the control monitoring of emissions are important. Optical spectroscopy powerful technique for measurement mercury, which in atmosphere predominantly appears atomic form. The mercury resonance line close to 254 nm can be utilized long-path absorption measurements average concentrations or light detection ranging (lidar) studies, where range-resolved co...

as we know sol-gel is one of the most important techniques for thin film preparation. in this paper, high transmission silica thin films have been prepared by dip-coating process from a new silicon-alkoxide solution. the prepared sol was stable for 45 days which is very important to characterize the coating process. the optical properties as a function of aging time, withdrawal rate, and heat t...