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 journalArticle

15 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

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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