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Indian Institute of Technology (IIT) Patna 
D. Punetha, M. Kar and S. K. Pandey  
Corresponding Authors:
D. Punetha 
DOI #: 
A new type low-cost, flexible and wearable tertiary nanocomposite sensor for room temperature hydrogen gas sensing 
Scientific Reports 
hydrogen gas sensing, nanocomposite sensor 
This paper reports on reduced graphene oxide (rGO), tin oxide (SnO2) and polyvinylidene fuoride (PVDF) tertiary nanocomposite thick flm based fexible gas sensor. The nanocomposite of 0.90(PVDF)−0.10[x(SnO2)−(1−x)rGO] with diferent weight percentages (x=0, 0.15, 0.30, 0.45, 0.6, 0.75, 0.90 and 1) have been prepared by the hot press method. Chromium (Cr) has been deposited on the surface by using E-beam evaporation system, which is used as electrode of the device. Crystal structure, morphology, and electrical characteristics of the device have been explored for the technological application. A correlation between crystallinity, morphology, and electrical properties with these thick flms has also been established. The device has been tested at diferent hydrogen (H2) gas concentration as well as at diferent response times. A superior response of 0.90(PVDF)−0.10[0.75(SnO2)−0.25 rGO] nanocomposite thick flm has been observed. Hence, this composition is considered as optimized tertiary nanocomposite for the hydrogen gas sensor application. The sensor response of 49.2 and 71.4% with response time 34sec and 52sec for 100 PPM and 1000 PPM H2 gas concentration respectively have been obtained. First time a new kind of low cost and fexible polymer based nanocomposite thick flm gas sensor has been explored. 
Entered by:
Venkata Dantham on 2020-08-02 
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