Abstract
Previous reports demonstrate that sensors based on multiple nanowires exhibit improved gas-sensing performance compared to a single nanowire based sensor due to the potential barrier modulation at nanojunctions, however, little attention has been paid to the effect between junction and electronic transport. Herein, junction-rich 2D SnO2 network assembled by nanorods and transfer-favored network assembled by nanowires were controllably synthesized, which were applied to ethanol detection. In comparison, sensor based on the transfer-favored 2D network exhibited significantly superior performance than that of the junction-rich one, not only in terms of the sensitivity but also the response/recovery time, which seems inclined to reveal that effective electronic transport contributes more in the gas-sensing process than that of potential barrier modulation at interface.
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