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Vol. 98, Issue 11, November 2008, pp.1-5




Room Temperature Ammonium Gas Sensing Behavior of Upright-standing ZnO Nano-sheets


aArindam Ghosh , aYuvraj G. Gudage, a,b Ramphal Sharma, bRajaram S. Mane and b*Sung-Hwan Han

aThin Film and Nanotechnology Laboratory, Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad–431004, (M.S.), India

bInorganic Nano-Material Laboratory, Department of Chemistry, Hanyang University, Haengdang-dong 17, Sungdong-ku, Seoul, 133-791, S. Korea

Tel: +822-2292-5212, fax: +822 2220-0762. *E-mail: shhan@hanyang.ac.kr



Received: 15 June 2008 /Accepted: 17 November 2008 /Published: 30 November 2008


Abstract: The room temperature operating resistive ammonia gas sensor is designed by using an upright-standing ZnO nano-sheets. Wet chemical route is preferred for growing ZnO upright-standing free nano-sheets of ~2-5 μm in length and ~100-150 nm in width. Structural, surface morphological and room temperature ammonium sensing properties of these nano-plates are elucidated. Well-resolved nano-sheets when kept in ammonium container showing good sensing behavior. Ammonia gas sensor response measured room temperature (300 K) is the function of gas concentration.


Keywords: ZnO nano-sheets; Surface morphology; Room temperature; Ammonium gas sensor


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