Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 148, Issue 1, Pages 41-48Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2010.04.046
Keywords
Conducting polymers; Poly(o-anisidine); Poly(o-anisidine)-SnO2 nanocomposites; Humidity sensing characteristics
Funding
- Board of Research in Nuclear Science (BRNS), Department of Atomic Energy (DAE), Mumbai, India [2008/37/44/BRNS]
- Ministry of Education, Science and Technology [KN-0942]
- National Research Foundation of Korea [2010-50171] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Poly(o-anisidine)-tin oxide (POA-SnO2) nanocomposites have been synthesized for the first time through an in situ chemical polymerization of o-anisidine in the presence of SnO2 nanoparticles of 25-40 nm in diameters. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and field emission scanning electron microscopy (FESEM) were used to characterize the POA-SnO2 nanocomposites. The characterization results confirmed the polymerization of o-anisidine and the strong interaction between POA and SnO2 nanoparticles. Humidity sensing characteristics such as relative humidity (RH)-impedance property, humidity hysteresis, response and recovery times and reproducibility of POA-SnO2 have been investigated. The nanocomposite with 50 wt% SnO2 exhibited better humidity sensing properties than pure POA, such as good sensitivity, fast response (similar to 87 s), rapid recovery (similar to 13 s), hysteresis within 4% and excellent repeatability. (C) 2010 Elsevier B.V. All rights reserved.
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