Functionalized individual ZnO microwire for natural gas detection

    Authors

    G. Y. Chai; O. Lupan; E. V. Rusu; G. I. Stratan; V. V. Ursaki; V. Sontea; H. Khallaf;L. Chow

    Comments

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    Abbreviated Journal Title

    Sens. Actuator A-Phys.

    Keywords

    ZnO microwire; Sensor; Natural gas; Methane; Focused ion beam; LOW-POWER CONSUMPTION; SENSOR; FABRICATION; NANOSENSOR; NANOWIRE; METHANE; BUTANE; TIO2; SNO2; CH4; Engineering, Electrical & Electronic; Instruments & Instrumentation

    Abstract

    A single ZnO microwire detector for the monitoring of natural gas species is described. Single-crystal ZnO microwires were synthesized using a carbothermal reduction vapor phase transport method. It was characterized by XRD, EDX, SEM. Raman and photoluminescence techniques. The sensor structure was fabricated by in situ lift-out method using focused ion beam (FIB) system. The prototype is then functionalized with palladium and used as sensing element. The main advantage of the FIB procedure is a quick verification/testing of concept and is compatible with micro/nanoelectronic devices. A response of 5% was obtained for a single ZnO microwire sensor at 2000 ppm natural gas in the air at room temperature. At 400 degrees C the response increases to 40%. Selectivity to different gasses was investigated and higher response was detected for natural gas. (C) 2012 Elsevier B.V. All rights reserved.

    Journal Title

    Sensors and Actuators a-Physical

    Volume

    176

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    64

    Last Page

    71

    WOS Identifier

    WOS:000301831700009

    ISSN

    0924-4247

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