Abstract

This chapter investigates the improvement of nanocomposited ZnO/SnO2 that was prepared on ZnO coated glass using thermal chemical vapor deposition (CVD). The sensor properties were characterized using current-voltage (I–V) measurement (Keithley 2400). The results analyzed were for ZnO agglomerate nanoparticle, SnO2 nanorod, and ZnO/SnO2 composite nanorods. The structural properties were characterized using field emission scanning electron microscopy (FESEM) (JEOL JSM 6701F). The thins films were tested using two-point probe and the sensors characterized using I–V measurement (Keithley 2400) in a clean humidity chamber (ESPEC SH-261). The chamber was set at the same room temperature (25 °C) with percent relative humidity (RH%) varied in the range of 40–90%RH. ZnO/SnO2 composite nanorods performed the highest sensitivity with 265 ratio compared to the ZnO agglomerate nanoparticle and SnO2 nanorod. The response and recovery time for ZnO/SnO2 composite nanorods were 227 s and 34 s respectively.

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