Sara Mohseni
Niroo Research Institute, Iran
Title: Detection and evaluation of industrial gas pollutants using optical sensor based on surface plasmon resonance technique
Biography
Biography: Sara Mohseni
Abstract
Hazardous materials from industries such as heavy metals, pollutants and pathogens to the environment pollute the environment and endanger human health. To identify these pollutants, analytical equipment including UV-visible spectroscopy, chromatography, mass spectrometry and atomic absorption spectrometry can be used. Different contaminants have challenged the usual analytical methods. Therefore, the use of a powerful and reliable tool for detecting pollutants is very important. Industrial pollutants can be identified with high precision using nanotechnology in optical sensors especially in power plants. Surface plasmon resonance (SPR) as an optical sensor is a powerful technique that detects any changes in dielectric-metal interference with high sensitivity on a chip with a nanostructured surface. Principal advantages of SPR compared to other techniques are: direct real time measurement of the interaction among label-free molecules, determination of the association and dissociation rates of the binding process and small amount of sample used in assay. Recently, using semiconductor metal oxides (SMO) as gas sensors has been widely considered in optical techniques such as SPR. Metallic oxides exhibit the surface plasmon emission properties at the interface between the dielectric and the SMO surface. Some metal oxides such as: ZnO, SnO2 and In2O3 are used to identify pollutant gases, including CO, CO2, H2S, NO2 and SO2. Metal oxide thin films have been deposited on Au coated glass prisms. The SPR reflectance curves were obtained under transient mode by varying the concentration of the target gas.