Open AccessNanocrystalline CuO Thin Films for H<sub>2</sub>S Monitoring: Microstructural and Optoelectronic Characterization
Author(s) -
Vikas Patil,
D. M. Jundale,
S. G. Pawar,
M. A. Chougule,
Prsad Godse,
S.A. Patil,
B. T. Raut,
Shashwati Sen
Publication year - 2011
Publication title -
journal of sensor technology
Language(s) - English
Resource type - Journals
eISSN - 2161-1238
pISSN - 2161-122X
DOI - 10.4236/jst.2011.12006
Subject(s) - nanocrystalline material , materials science , scanning electron microscope , monoclinic crystal system , copper , spin coating , thin film , analytical chemistry (journal) , aqueous solution , chemical engineering , crystallography , crystal structure , nanotechnology , chemistry , composite material , metallurgy , organic chemistry , engineering
Nanocrystalline copper oxide (CuO) thin films were deposited onto glass substrates by a spin coating technique using an aqueous solution of copper acetate. These films were characterized for their structural, mor-phological, optoelectronic properties by means of X-ray diffraction (XRD) scanning electron microscopy (SEM), UVspectroscopy and four probe method. The CuO films are oriented along (1 1 1) plane with the monoclinic crystal structure. These films were utilized in H2S sensors. The dependence of the H2S response on the operating temperature, H2S concentration of CuO film (annealed at 700。C) was investigated. The CuO film showed selectivity for H2S. The maximum H2S response of 25.2 % for the CuO film at gas concentra-tion of 100 ppm at operating temperature 200oC was achieved
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