The I-V characteristics of hydrothermal growth ZnO nanorods

This study aims to analyze the conductivity of ZnO nanorods grown by using the hydrothermal method. We use the I-V characteristic test to determine the conductivity. In this research, the process of making samples of ZnO nanorods was carried out in two stages: preparing the seed layer and then growing ZnO nanorods using the hydrothermal method. After testing the characteristics of using SEM, the resulting crystal structure of ZnO nanorods is hexagonal wurtzite with the direction of growing perpendicular to the substrate. Besides, the resulting I-V characteristics indicate a physical phenomenon that occurs at a temperature variation of ≥ 190°C which means a peak. While the details of phenomena still need to be elaborated. Besides, a gas effect test was also conducted which showed that the sensor was at a maximum working temperature of 190°C with an input voltage of 8 volts and reached a gas sensitivity at 220°C. (paper)