Electric Spark Induced Instantaneous and Selective Reduction of Graphene Oxide on Textile for Wearable Electronics

Kedambaimoole, V and Kumar, N and Shirhatti, V and Nuthalapati, S and Nayak, MM and Konandur, R (2020) Electric Spark Induced Instantaneous and Selective Reduction of Graphene Oxide on Textile for Wearable Electronics. In: ACS Applied Materials and Interfaces, 12 (13). pp. 15527-15537.

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Abstract

Reduced graphene oxide (rGO) attracts great popularity as an alternative to pristine graphene because of the facile synthesis process of its precursor, graphene oxide (GO). Electrical conduction of GO is tunable, subject to the extent of reduction of oxygen functional groups in it. This work for the first time demonstrates rapid reduction of GO using spark at ambient conditions. A stream of spark generated by applying high electric potential across two electrodes, when passed through a film of GO deposited on a porous substrate, reduces it into rGO. Upon sparking, the electrical resistance of the GO film drops down by an order of six within a second, making the reduction process instantaneous. X-ray photoelectron spectroscopy and Raman spectra of spark-reduced graphene oxide (SrGO) films revealed a high C/O ratio with an increase in the domain of sp2-hybridized carbon. The electromechanical properties of SrGO were practically examined by testing it as a flex sensor by incorporating its films with commercially available gloves. It showed high sensitivity for bending and good repeatability while offering an easy route for textile integration, making an impactful statement about the potential of sparking as a cost-effective method to reduce GO on a large scale

Item Type:	Journal Article
Publication:	ACS Applied Materials and Interfaces
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society
Keywords:	Carbon films; Cost effectiveness; Electric potential; Electric sparks; Oxide films; Photoelectron spectroscopy; Reduced Graphene Oxide; Textiles; Wearable technology; X ray photoelectron spectroscopy, Cost-effective methods; Electrical conduction; Electrical resistances; Electromechanical property; Reduced graphene oxides (RGO); Reduction of oxygen; Selective reduction; Textile integrations, Graphene
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	01 Feb 2023 07:29
Last Modified:	01 Feb 2023 07:29
URI:	https://eprints.iisc.ac.in/id/eprint/79668

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