Humidity-Sensitive Properties of TiO₂ Nanorods Grown Between Electrodes on Au Interdigital Electrode Substrate

Abstract

In this paper, the coralloid TiO₂ nanorods were fabricated directly between electrodes on the Au interdigital electrodes via a hydrothermal method. The TiO₂ nanorods were characterized using X-ray diffraction and scanning electron microscopy. Results indicated that the TiO₂ nanorods have good sensitivity for humidity, including at low humidity level, and response time is momentary. This paper discusses the mechanism that probably caused the improved performance of the TiO₂ nanorods by studying its electrical property through a complex impedance analysis method.