期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 146, 期 1, 页码 266-272出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2010.02.058
关键词
Nanowire; Cupric oxide; Single-walled carbon nanotubes; Nanocomposite; Gas sensor
资金
- National Research Laboratory Program of Korea
- National Research Foundation of Korea [2007-0056703, 과C6B2012] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Porous nanowire-structured cupric oxide (CuO) film is synthesized by deposition of Cu on porous single-walled carbon nanotube (SWNT) substrate followed by a thermal oxidation process. Oxidation is done in air at a temperature range of 300-800 degrees C to oxidize the Cu while removing the SWNT template. The oxidation temperature determines the stoichiometry of the CuO formed, and thus the electrical property. The structures and electrical properties of the synthesized materials are investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), and current-voltage measurements. Sensing property is examined using hydrogen gas. Gas sensing mechanism and the advantages of nanowire structure as a sensor are also discussed. The best response and recovery results are observed with the CuO nanowires oxidized at 400 degrees C at a working temperature of 250 degrees C. (c) 2010 Elsevier B.V. All rights reserved.
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