This study investigates the effectiveness of using laterally oriented zinc oxide (ZnO) nanosheets (NSs) grown by the hydrothermal growth (HTG) method for relative humidity (RH) sensing at room temperature (RT). A sensing response (R12%/R96%) at RT of as high as 220, good sensing linearity in the range of 12-96% RH, a fast sensing response time of as low as 600 s, and a recovery time of 3 s are achieved. Compared to conventional ZnO-nanowire-based humidity sensors, a 100-fold improvement in the sensing response at RT was obtained, which is mainly attributed to the ZnO NSs having a much higher surface-to-volume ratio and a porous-like surface.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry