Indian Science Technology and Engineering facilities Map
Supplier Map
Service Map


Publication Details

Indian Institute of Technology (IIT) Patna 
Pranay Ranjan, Punam Tiwary, A. K. Chakraborty, R. Mahapatra, Ajay D. Thakur 
Corresponding Authors:
Pranay Ranjan, A. K. Chakraborty, Ajay D. Thakur 
DOI #: 
Graphene oxide based free-standing films for humidity and hydrogen peroxide sensing 
Journal of Materials Science: Materials in Electronics 
Graphene oxide, humidity and hydrogen peroxide sensing 
We have synthesized free-standing films of graphene oxide (GO), reduced graphene oxide (rGO) and graphene oxide-manganese oxide composite (GMC) for humidity and hydrogen peroxide sensing applications. Structural and morphological characterizations of these free-standing films were performed using X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM). The presence of anionic sites in the form of oxygen functional groups (OFGs) at the surface of GO along with its hydrophilic nature makes GO a unique candidate as a suitable material for humidity and hydrogen peroxide sensing. In contrast, rGO has a relatively lower fraction of OFGs, higher electrical conductivity and hydrophobicity compared to GO. We estimate the response time, recovery time and stability of free-standing films over multiple sensing-degassing cycles of the as chemically prepared GO, rGO and GMC films for humidity sensing. We observed a dramatic improvement in both the response and recovery times for rGO and GMC films compared to GO film at relatively low humidity, while at higher humidity percentages, rGO film has the best response and recovery times compared to GMC and GO films. Regarding stability, GO was found to be more stable over multiple sensing cycles compared to rGO and GMC at high humidity values. In addition to this, we observed that the addition of metal oxide to GO makes GMC film more selective for hydrogen peroxide sensing in comparison to GO and rGO film at a lower concentration. 
Entered by:
Venkata Dantham on 2020-08-02 
I-Mitra(आई-मित्र) Welcomes You..
It has always been the basic tenet of the Government of India, in generously funding R&D efforts at academic institutions over the years, that facilities established through such support be made available to those needing them and qualified to make use of them for their own research work

However, this was never easy or straightforward for, among other reasons, there was no ready source of information of what facility was available and where. Thanks to the Web, it is much easier today to have a national and regional “inventory of resources”, so as to match users with the resources they need, and to do all this in an efficient and transparent manner.

This can lead to a leap in R&D productivity and greatly enhance the effectiveness of public investment. This is the motivation behind I-STEM.
read less <<
Visitor Hit Counter
Hosted at Indian Institute of Science
Copyright © 2020 I-STEM. All rights reserved.
Audited by: STQC Bengaluru.