Synthesis and characterization of Cu-doped ZnO one-dimensional structures for miniaturized sensor applications with faster response

    Authors

    L. Chow; O. Lupan; G. Chai; H. Khallaf; L. K. Ono; B. R. Cuenya; I. M. Tiginyanu; V. V. Ursaki; V. Sontea;A. Schulte

    Comments

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    Abbreviated Journal Title

    Sens. Actuator A-Phys.

    Keywords

    ZnO; Crystal; Sensor; Microrod; Cu-doping; HYDROGEN GAS NANOSENSOR; THIN-FILMS; ZINC-OXIDE; GREEN LUMINESCENCE; METHANOL SYNTHESIS; SENSING PROPERTIES; ROOM-TEMPERATURE; COPPER; SENSITIVITY; FABRICATION; Engineering, Electrical & Electronic; Instruments & Instrumentation

    Abstract

    Detection of chemicals and biological species is an important issue to human health and safety. In this paper, we report the hydrothermal synthesis at 95 degrees C of Cu-doped ZnO low-dimensional rods for room-temperature (RT) sensing applications and enhanced sensor performances. X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Raman and photoluminescence are used to characterize the material properties. To demonstrate the suitability of the Cu-doped ZnO rods for gas sensor applications and for comparison with pure ZnO, we fabricated a double rod device using Focused Ion Beam. The responses of pure-ZnO and Cu-doped ZnO rods studied in exactly the same condition are reported. We found that Cu-ZnO sensors have enhanced RT sensitivity, faster response time, and good selectivity. Miniaturized Cu-ZnO rod-based sensors can serve as a good candidate for effective H-2 detectors with low power consumption. (C) 2012 Elsevier B.V. All rights reserved.

    Journal Title

    Sensors and Actuators a-Physical

    Volume

    189

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    399

    Last Page

    408

    WOS Identifier

    WOS:000314622600049

    ISSN

    0924-4247

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