Flexible strain sensor with high sensitivity, fast response, and good sensing range for wearable applications

Nuthalapati, S and Kedambaimoole, V and Shirhatti, V and Kumar, S and Takao, H and Nayak, MM and Rajanna, K (2021) Flexible strain sensor with high sensitivity, fast response, and good sensing range for wearable applications. In: Nanotechnology, 32 (50).

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Abstract

Flexible strain sensors are emerging rapidly and overcoming the drawbacks of traditional strain sensors. However, many flexible sensors failed to balance the sensitivity, response time, and the desired sensing range. This work proposes a novel and cost-effective strain sensor which simultaneously achieved high sensitivity, fast response, and a good sensing range. It illustrates a prototype strain sensor realized with a nanocomposite constituting reduced graphene oxide and palladium as the primary sensing elements. These sensors were fabricated with manual screen-printing technology. The sensor exhibited an outstanding performance for the different strains ranging from 0.1 to 45. As a result, a substantially high gauge factor around 1523 at a strain of as high as 45 and a rapid response time of 47 ms was obtained. This work demonstrated potential applications like real-time monitoring of pulse and respiration, and other physical movement detection, which become crucial parameters to be measured continuously during the COVID-19 pandemic. © 2021 IOP Publishing Ltd.

Item Type:	Journal Article
Publication:	Nanotechnology
Publisher:	IOP Publishing Ltd
Additional Information:	The copyright for this article belongs to IOP Publishing Ltd
Keywords:	Cost effectiveness; Graphene; Screen printing; Strain; Wearable sensors, Cost effective; Effective strain; Fast response; Flexible; Flexible sensor; High sensitivity; Reduced graphene oxides; Sensing ranges; Strain sensors; Wearable applications, Nanocomposites
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	28 Nov 2021 09:32
Last Modified:	28 Nov 2021 09:32
URI:	http://eprints.iisc.ac.in/id/eprint/70405

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