Laser-Induced Direct Patterning of Free-standing Ti3C2-MXene Films for Skin Conformal Tattoo Sensors

Kedambaimoole, V and Kumar, N and Shirhatti, V and Nuthalapati, S and Sen, P and Nayak, MM and Rajanna, K and Kumar, S (2020) Laser-Induced Direct Patterning of Free-standing Ti3C2-MXene Films for Skin Conformal Tattoo Sensors. In: ACS sensors, 5 (7). pp. 2086-2095.

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Abstract

The discovery of stable two-dimensional (2D) materials has effectuated a rapid evolution of skin conformal sensors for health monitoring via epidermal electronics. Among the newly discovered 2D materials, MXene stands out as a solution-processable 2D material allowing easy fabrication of highly conductive thin films with the potential to realize flexible skin conformal sensors. Here, we present a successful demonstration of a Ti3C2-MXene resistor as an extremely sensitive strain sensor in the form an ultrathin skin mountable temporary tattoo. The skin conformability and form factor afforded by the sensor promises inconspicuous and continuous monitoring of vital health parameters of an individual, like the pulse rate, respiration rate, and surface electromyography. The sensor serves as a single conduit for sensing the respiration rate and pulse, dispensing with the need of mounting multiple sensors. Its remarkably high sensitivity with a gauge factor of �7400 has been ascribed to development of nanocracks and their propagation through the film upon application of strain. The fast response and highly repeatable sensor follows easy fabrication steps and can be patterned into any shape and size using a laser.

Item Type:	Journal Article
Publication:	ACS sensors
Publisher:	NLM (Medline)
Additional Information:	The copyright of this article belongs to NLM (Medline)
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	28 Aug 2020 03:49
Last Modified:	28 Aug 2020 03:49
URI:	http://eprints.iisc.ac.in/id/eprint/66254

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