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Gas Sensing Properties of Porous ZnO Nano-Platelet Films

Published online by Cambridge University Press:  01 February 2011

Amandeep Saluja ,
Jie Pan ,
Lei Kerr ,
Eunjung Cho  and
Seth Hubbard
Amandeep Saluja
Affiliation:
smhsps@rit.edu, Rochester Institute of Technology, Physics, 85 Lomb Memorial Drive, Rochester, NY, 14623, United States, 5854754214, 5854757890
Jie Pan
Affiliation:
panj@muohio.edu, Miami University, Department of Paper and Chemical Engineering, Oxford, OH, 45056, United States
Lei Kerr
Affiliation:
kerrll@muohio.edu, Miami University, Department of Paper and Chemical Engineering, Oxford, OH, 45056, United States
Eunjung Cho
Affiliation:
cho@hf.tu-darmstadt.de, Department of High Frequency Electronics, Technische Universität Darmstadt, Darmstadt, N/A, Germany
Seth Hubbard
Affiliation:
smhsps@rit.edu, Rochester Institute of Technology, NanoPower Reserach Laboratory, Department of Physics, 85 Lomb Memorial Drive, Rochester, NY, 14623, United States
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Abstract

In this work, various ZnO nanostructures were synthesized and a detailed study on the effect of different process parameters such as temperature, carrier gas flow, inter-electrode spacing, gas concentration and material properties on gas sensitivity was conducted. Initial ZnO nanoparticles were prepared by a simple solution chemical process and characterized by Secondary Electron Microscopy (SEM) and Brunauer, Emmet and Teller (BET) Sorptometer to demonstrate the morphology and surface area respectively. Sensitivity of nano-platelets and porous films was measured for different concentrations of the analytes (H2, CO). High response was observed at room temperature for H2 gas with sensitivities in excess 80% for 60ppm and about 55% for 80ppm of H2 gas at room temperature were observed for the nano-platelets and the porous films respectively with short response and recovery times of about 200 seconds. The sensitivity of the nano-platelets to CO gas was also measured and found to be about near 90% for 80 ppm CO at operating temperatures of 200 °C.

Keywords

sensormicroelectro-mechanical (MEMS)nanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1035: Symposium L – Zinc Oxide and Related Materials–2007 , 2007 , 1035-L11-07
Copyright
Copyright © Materials Research Society 2008

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