CHARACTERIZATION OF ZNO NANOSTRUCTURE BASED METHANOL SENSOR PREPARED BY SOL-GEL AND CHEMICAL BATH DEPOSITION

A ZnO nanostructure based methanol sensor prepared by sol gel having average length of 599nm is reported in this paper. A low temperature chemical bath deposition technique is employed using zinc nitrate hexahydrate and hexamethylenetetramineprecursor at 100 0 C on SiO2 substrate having sol gel grown seed layer. After structural characterization (XRD, SEM) three types of sensor structure designed using Aluminum electrode .The .1M concentration sample shows better magnitude response at 250 0 C .While other sensor shows that at low temperature less than 150 0 C the sensor operates. The possible sensing mechanism also discussed briefly.