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Indexed by:期刊论文

Date of Publication:2019-09-15

Journal:JOURNAL OF ALLOYS AND COMPOUNDS

Included Journals:SCIE、EI

Volume:801

Page Number:360-366

ISSN No.:0925-8388

Key Words:LBCO; Single-crystal film; Gas sensor; Ethanol detection

Abstract:Single-crystal perovskite LaBaCo2O6-delta (LBCO) films grown on (001) MgO substrates were fabricated into the micro-sensors with line widths of 30-200 mu m by a precision process technology. The LBCO micro-sensors exhibited nearly identical performance with long-term stability in detection of ethanol. In the humid environment, the LBCO micro-sensors were demonstrated to have the gas responses independent on humidity while the response time exhibited almost exponential increase with the increase in humidity, thus having great potential of simultaneously monitoring ethanol and humidity. In addition, the gas sensing properties were investigated using air and Ar flows as the carrier gases, and the oxygen vacancy model was suggested to be the major mechanism responsible for detection of reducing gases. (C) 2019 Elsevier B.V. All rights reserved.