Supercapacitor based approach towards development of Graphene Sensors

Shirhatti, Vijay and Nuthalapati, Suresh and Neella, Nagarjuna and Kedambaimoole, Vaishakh and Nayak, M M and Rajanna, K (2018) Supercapacitor based approach towards development of Graphene Sensors. In: 13th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2018, 22-26 April, 2018, Singapore, pp. 267-270.

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Abstract

Graphene has been extensively studied and used in energy storage applications like Supercapacitors owing to its high Electric Double Layer Capacitance (EDLC). However, this property of Graphene has not been used in Sensor technology. We report a novel approach for the development of Graphene Capacitive sensors by adopting the Supercapacitor property of Graphene. Graphene was synthesized by Electro-exfoliation process followed by Hydrazine hydrate reduction. The obtained material was characterized using XRD and FE-SEM to ensure structural and morphological properties. An Interdigitized Electrode (IDE) pattern was prepared with reduced Exfoliated Graphene (rEG) as electrode and PVA-H2SO4 electrolytic gel was used to realize EDLC. The fabricated strain sensing device was found to have a gauge factor of 97.3. This low cost, flexible, highly sensitive and easy to fabricate device opens up a new area of capacitance based sensors with wide applications in the chemical & automotive industry, healthcare, robotics, aerospace, mining etc.

Item Type:	Conference Proceedings
Series.:	International Conference on Nano-Micro Engineered and Molecular Systems NEMS
Publisher:	IEEE
Additional Information:	13th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS), Singapore, SINGAPORE, APR 22-26, 2018
Keywords:	rEG; Graphene; Supercapacitor; Strain sensor; PVA-H2SO4; PDMS; IDE
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	05 Jul 2019 05:19
Last Modified:	05 Jul 2019 05:19
URI:	http://eprints.iisc.ac.in/id/eprint/62815

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