Highly sensitive and selective hydrogen single-nanowire nanosensor

    Authors

    O. Lupan; L. Chow; T. Pauporte; L. K. Ono; B. R. Cuenya;G. Chai

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Sens. Actuator B-Chem.

    Keywords

    Cd-doped; ZnO nanowire; Nanosensor; Gas response; Selective; Hydrogen; DOPED ZNO NANOWIRES; ROOM-TEMPERATURE; ELECTROCHEMICAL DEPOSITION; NANORODS; ARRAYS; SENSOR; ELECTRODEPOSITION; NANOCRYSTALS; FABRICATION; HUMIDITY; Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation

    Abstract

    Metal oxides such as ZnO have been used as hydrogen sensors for a number of years. Through doping. the gas response of zinc oxide to hydrogen has been improved. Cadmium-doped ZnO nanowires (NWs) with high aspect ratio have been grown by electrodeposition. Single doped ZnO NWs have been isolated and contacted to form a nanodevice. Such nanosystem demonstrates an enhanced gas response and selectivity for the detection of hydrogen at room temperature compared to previously reported H-2 nanosensors based on pure single-ZnO NWs or multiple NWs. A dependence of the gas response of a single Cd-ZnO nanowire on the NW diameter and Cd content was observed. It is shown that cadmium-doping in single-crystal zinc oxide NWs can be used to optimize their response to gases without the requirement of external heaters. The sensing mechanisms responsible for such improved response to hydrogen are discussed. (C) 2012 Elsevier B.V. All rights reserved.

    Journal Title

    Sensors and Actuators B-Chemical

    Volume

    173

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    772

    Last Page

    780

    WOS Identifier

    WOS:000311248100109

    ISSN

    0925-4005

    Share

    COinS