UCL Discovery Stage
UCL home » Library Services » Electronic resources » UCL Discovery Stage

Carrier Mobility-Dominated Gas Sensing: A Room-Temperature Gas-Sensing Mode for SnO₂ Nanorod Array Sensors

Xu, S; Zhao, H; Xu, Y; Xu, R; Lei, Y; (2018) Carrier Mobility-Dominated Gas Sensing: A Room-Temperature Gas-Sensing Mode for SnO₂ Nanorod Array Sensors. ACS Applied Materials & Interfaces , 10 (16) pp. 13895-13902. 10.1021/acsami.8b03953. Green open access

[thumbnail of Carrier Mobility Dominated Gas-Sensing A Room-Temperature Gas-Sensing Mode for SnO2 Nanorod Array Sensors.pdf]
Preview
Text
Carrier Mobility Dominated Gas-Sensing A Room-Temperature Gas-Sensing Mode for SnO2 Nanorod Array Sensors.pdf - Accepted Version

Download (1MB) | Preview

Abstract

Adsorption-induced change of carrier density is presently dominating inorganic semiconductor gas sensing, which is usually operated at a high temperature. Besides carrier density, other carrier characteristics might also play a critical role in gas sensing. Here, we show that carrier mobility can be an efficient parameter to dominate gas sensing, by which room-temperature gas sensing of inorganic semiconductors is realized via a carrier mobility-dominated gas-sensing (CMDGS) mode. To demonstrate CMDGS, we design and prepare a gas sensor based on a regular array of SnO2 nanorods on a bottom film. It is found that the key for determining the gas-sensing mode is adjusting the length of the arrayed nanorods. With the change in the nanorod length from 340 to 40 nm, the gas-sensing behavior changes from the conventional carrier-density mode to a complete carrier-mobility mode. Moreover, compared to the carrier density-dominating gas sensing, the proposed CMDGS mode enhances the sensor sensitivity. CMDGS proves to be an emerging gas-sensing mode for designing inorganic semiconductor gas sensors with high performances at room temperature.

Type: Article
Title: Carrier Mobility-Dominated Gas Sensing: A Room-Temperature Gas-Sensing Mode for SnO₂ Nanorod Array Sensors
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsami.8b03953
Publisher version: https://doi.org/10.1021/acsami.8b03953
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: gas-sensing modes, inorganic semiconductors, carrier mobility, room temperature, nanorod arrays
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10076158
Downloads since deposit
7,872Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item