Low power consumption gas sensor based on In2O3 nanowires in detecting hazardous gases

Abstract

Recently, gas-sensing devices have been applied popularly in a ton of distinct areas, such as environmental monitoring, breath analysis, food storage, and detectors for both indoor and outdoor hazardous gases. Many efforts have been studied the novel generation sensor that consists of the advantages, i.e. low power consumption, low-cost, and flexibility. One of the potential strategies to deal with this issue is self-heating. In this study, the self-heated In2O3 nanofibers-based gas sensor was synthesized and fabricated via a chemical vapor deposition (CVD) combined with drop casting the as-prepared In2O3 nanowires on the IDE electrode. The sensor indicates a high response toward H2S at the supplied power of 1200 µW (Rg /Ra ~ 1.35). This is attributed to the length of single In2O3 nanowires (NWs), which provides a great pathway for electron transfer. The remarkable enhancement performance of the sensor is considered the first – step in the development of smart sensing devices.