Crumpled sheets of reduced graphene oxide as a highly sensitive, robust and versatile strain/pressure sensor

Subhajit Kundu, Rammohan Sriramdas, Kazi Rafsanjani Amin, Aveek Bid, Rudra Pratap, Narayanan Ravishankar

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Sensing of mechanical stimuli forms an important communication pathway between humans/environment and machines. The progress in such sensing technology has possible impacts on the functioning of automated systems, human machine interfacing, health-care monitoring, prosthetics and safety systems. The challenges in this field range from attaining high sensitivity to extreme robustness. In this article, sensing of complex mechanical stimuli with a patch of taped crumpled reduced graphene oxide (rGO) has been reported which can typically be assembled under household conditions. The ability of this sensor to detect a wide variety of pressures and strains in conventional day-to-day applications has been demonstrated. An extremely high gauge factor (∼103) at ultralow strains (∼10-4) with fast response times (<20.4 ms) could be achieved with such sensors. Pressure resulting from a gentle touch to over human body weight could be sensed successfully. The capability of the sensor to respond in a variety of environments could be exploited in the detection of water and air pressures both below and above atmospheric, with a single device.

Original languageEnglish (US)
Pages (from-to)9581-9588
Number of pages8
JournalNanoscale
Volume9
Issue number27
DOIs
StatePublished - Jul 21 2017

Bibliographical note

Funding Information:
NR acknowledges the Department of Science and Technology (DST), India for financial support. AB acknowledges funding from Nanomission, DST, Govt of India. KRA thanks CSIR, MHRDG, Govt. of India for financial support. We acknowledge the use of instruments in CeNSE and AFMM which are central facilities at IISc.

Publisher Copyright:
© 2017 The Royal Society of Chemistry.

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

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