Rapid and Template Free Synthesis of ZnO Nanorods and Analysis of their LPG Sensing Properties

ZnO nanorods (diameters25 nm and lengths145-150 nm) were synthesized by using a simple solochemical method and their LPG sensing properties were investigated. The ZnO nanorods exhibited outstanding gas sensing characteristics such as, higher gas response (502 to 50 ppm LPG at 300 -C), extremely rapid response (6-7 s), fast recovery (67 s), excellent reproducibility, good sensing selectivity and relatively lower operating temperature (300 -C). The experimental results clearly demonstrate the potential of using the ZnO nanorods as sensing material in the fabrication of LPG sensors.