A national workshop organized Indian Institute of Metals

New Horizons in Metallurgy, Materials, and Manufacturing

A national workshop organized by Indian Institute of Metals
December 14th - 16th 2020

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Chemical sensing through modified graphene

avatar Prof. Abha Misra Department of Instrumentation and Applied Physics,
Indian Institute of Science, Bangalore 560012
  • Bio

    Dr. Abha Misra is an Associate Professor obtained in the Department of Instrumentation and Applied Physics, at Indian Institute of Science (IISc). She obtained her PhD from Indian Institute of Technology Bombay (IIT Bombay). Thereafter, she received Gordon and Betty Moore Foundation Postdoctoral Fellowship in California Institute of Technology (Caltech), USA. Dr. Misra is an Associate of Indian Academy of Sciences, member of National Science Academy and TWAS Young Affiliate. She is also a recipient of INSA Medal for Young Scientists, SERB Women Excellence Award. Dr. Misra’s research at IISc is mainly focusing on meta-devices for various sensing applications. She is an Associate Editor of RSC Advances.

  • Abstract

    Currently, there is an enormous demand for the development of high performance gas sensors for environmental pollution monitoring. Hence, there is a constant quest to replace traditional metal oxide nanostructures as gas sensing materials due to the challenges associated with high temperature working condition. Carbon nanomaterials, particularly graphene because of its unique properties have recently attracted a great deal of interests for gas sensing applications. Abundant defects and functional groups on reduced graphene oxide (rGO), a derivative of graphene, not only facilitate gas adsorption but also provide the ease of selective functionalization with specific organic and inorganic groups for achieving selectivity. The interfacial interactions at the junctions of rGO and nanostructures support the modulation of electronic properties, making the graphene hybrid highly responsive to external chemical perturbations. Moreover, atomic scale interaction of molecules with the graphene that could lead to an advanced applications such as molecular memory switches. The combined role of modified interfaces though gate control leads to a much responsive gas sensing characteristics that leads to its molecular memory operation.