In this work, one dimension In2O3 nanostructures as detecting materials for indoor toxic gases were synthesized by an electrospinning process. The morphology of electrospun In2O3 nanofibers was controlled by electrolyte composition, applied voltage and working distance between a nozzle and a substrate. The synthesized In2O3 nanofibers-based paste with/without carbon black additives was prepared for the integration on a sensor device. The integration of In2O3 sensing materials was conducted by a hand-printing of the paste into the interdigit Au electrodes patterned on Si wafer. Gas sensing properties on CO and HCHO gases were characterized at 300℃. The evaluated sensing properties such as sensitivity, response time and recovery time were improved in In2O3 nanofiber pastes with carbon black, compared to the paste without carbon black.
