Reduced Graphene Oxide Tattoo as Wearable Proximity Sensor

Kedambaimoole, V and Kumar, N and Shirhatti, V and Nuthalapati, S and Kumar, S and Nayak, MM and Sen, P and Akinwande, D and Rajanna, K (2021) Reduced Graphene Oxide Tattoo as Wearable Proximity Sensor. In: Advanced Electronic Materials .

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Abstract

The human body is punctuated with wide array of sensory systems that provide a high evolutionary advantage by facilitating formation of a detailed picture of the immediate surroundings. The sensors range across a wide spectrum, acquiring input from noncontact audiovisual means to contact-based input via touch and taste. The ambit of sensing can be extended further by imparting the body with increased noncontact sensing capability through the phenomenon of electrostatics. Here, a graphene-based tattoo sensor is presented for proximity sensing, employing the principle of electrostatic gating. The sensor shows a remarkable change in resistance upon exposure to objects surrounded with static charge on them. Compared to prior work in this field, the sensor demonstrates the highest recorded proximity detection range of 20 cm. It is ultrathin, highly skin conformal, and comes with a facile transfer process such that it can be tattooed on the human skin, unlike other graphene-based proximity sensors reported before. Present work details the operation of wearable proximity sensor while exploring the effect of mounting body on the working mechanism. A possible role of the sensor as an alerting system against unwarranted contact with objects in public places especially during the current COVID-19 pandemic is also explored. © 2021 Wiley-VCH GmbH

Item Type:	Journal Article
Publication:	Advanced Electronic Materials
Publisher:	Blackwell Publishing Ltd
Additional Information:	The copyright for this article belongs to Blackwell Publishing Ltd
Keywords:	Electrostatics; Graphene; Proximity sensors, Alerting systems; Non-contact sensing; Proximity detection; Proximity sensing; Public places; Sensory system; Transfer process; Working mechanisms, Wearable sensors
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	30 Mar 2021 09:17
Last Modified:	30 Mar 2021 09:17
URI:	http://eprints.iisc.ac.in/id/eprint/68602

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