TY - JOUR
T1 - Fabrication of a sensitive gas sensor based on PPy/TiO2 nanocomposites films by layer-by-layer self-assembly and its application in food storage
AU - Cui, Shaoqing
AU - Yang, Liangcheng
AU - Wang, Jun
AU - Wang, Xinlei
N1 - Funding Information:
We would like to thank the staff of Craniofacial Sciences Laboratory, School of Dental Sciences, Universiti Sains Malaysia for their help rendered in this study. This study was financially supported by Fundamental Research Grant Scheme (FRGS) from Ministry of Higher Education, Malaysia (203/ PPSG/6171134).
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/10/5
Y1 - 2016/10/5
N2 - An extra sensitive quartz crystal microbalance (QCM) gas sensor coated with thin PPy/TiO2 nanocomposite film was fabricated by using layer by layer self-assembly (SA) technology. The synthetic procedure and the resultant nanocomposites were characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and field-emission scanning electron microscopy (FE-SEM). It was found that an ultra-sensitive PPy/TiO2 nanocomposite film with very thin layer can be successfully obtained by. It was also found that the number of deposited layers strongly impacted on sensor response with ten bilayers showing best sensor performance. The obtained gas sensor coating with PPy/TiO2 sensitive film was found to exhibit a better performance with respect to sensor responses, which is based on frequency data. The resultant sensor represented high sensitivity toward 10 ppm of different targeted gases with evident frequency shift, fast response and recovery time. Long-term stability and excellent reversibility were also observed. In real-time application, a designed measurement set-up based on PPy/TiO2 based sensor showed a good ability on shelf-life evaluation of foodstuffs (mango, egg and fish). The resulting QCM based gas sensor coated with PPy/TiO2 nanocomposite via Layer by Layer self-assembly presented a promising capability to detect trace irritant gases and food quality evaluation.
AB - An extra sensitive quartz crystal microbalance (QCM) gas sensor coated with thin PPy/TiO2 nanocomposite film was fabricated by using layer by layer self-assembly (SA) technology. The synthetic procedure and the resultant nanocomposites were characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and field-emission scanning electron microscopy (FE-SEM). It was found that an ultra-sensitive PPy/TiO2 nanocomposite film with very thin layer can be successfully obtained by. It was also found that the number of deposited layers strongly impacted on sensor response with ten bilayers showing best sensor performance. The obtained gas sensor coating with PPy/TiO2 sensitive film was found to exhibit a better performance with respect to sensor responses, which is based on frequency data. The resultant sensor represented high sensitivity toward 10 ppm of different targeted gases with evident frequency shift, fast response and recovery time. Long-term stability and excellent reversibility were also observed. In real-time application, a designed measurement set-up based on PPy/TiO2 based sensor showed a good ability on shelf-life evaluation of foodstuffs (mango, egg and fish). The resulting QCM based gas sensor coated with PPy/TiO2 nanocomposite via Layer by Layer self-assembly presented a promising capability to detect trace irritant gases and food quality evaluation.
KW - Gas sensor
KW - Nanocomposite
KW - Nanostructure
KW - Polypyrrole/titanium dioxide
KW - Quartz crystal microbalance
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U2 - 10.1016/j.snb.2016.04.093
DO - 10.1016/j.snb.2016.04.093
M3 - Article
AN - SCOPUS:84964573591
SN - 0925-4005
VL - 233
SP - 337
EP - 346
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
ER -