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Prototyping a wearable and stretchable graphene-on-PDMS sensor for strain detection on human body physiological and joint movements

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Abstract

In the era of wearable electronic devices, which are quite popular nowadays, our research is focused on flexible as well as stretchable strain sensors, which are gaining humongous popularity because of recent advances in nanocomposites and their microstructures. Sensors that are stretchable and flexible based on graphene can be a prospective ‘gateway’ over the considerable biomedical speciality. The scientific community still faces a great problem in developing versatile and user-friendly graphene-based wearable strain sensors that satisfy the prerequisites of susceptible, ample range of sensing, and recoverable structural deformations. In this paper, we report the fabrication, development, detailed experimental analysis and electronic interfacing of a robust but simple PDMS/graphene/PDMS (PGP) multilayer strain sensor by drop casting conductive graphene ink as the sensing material onto a PDMS substrate. Electrochemical exfoliation of graphite leads to the production of abundant, fast and economical graphene. The PGP sensor selective to strain has a broad strain range of ⁓60%, with a maximum gauge factor of 850, detection of human physiological motion and personalized health monitoring, and the versatility to detect stretching with great sensitivity, recovery and repeatability. Additionally, recoverable structural deformation is demonstrated by the PGP strain sensors, and the sensor response is quite rapid for various ranges of frequency disturbances. The structural designation of graphene’s overlap and crack structure is responsible for the resistance variations that give rise to the remarkable strain detection properties of this sensor. The comprehensive detection of resistance change resulting from different human body joints and physiological movements demonstrates that the PGP strain sensor is an effective choice for advanced biomedical and therapeutic electronic device utility.

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Acknowledgements

The authors express their gratitude to Dr. Ashok K. Chauhan, Founder President, Amity Universe, for his unwavering support and encouragement. They also extend their thanks to the other members of the AIARS (M&D) group at Amity University, Noida, for their assistance and support.

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Authors and Affiliations

  1. Amity Institute of Advanced Research and Studies (Materials & Devices), Amity University, Sector-125, Noida, 201303, U.P, India

    Prashant Shukla, Devinder Madhwal, Yugal Singh, Nitin Bhardwaj, Rajesh Samal, Vivek Kumar & V. K. Jain

  2. G. L. Bajaj Institute of Technology and Management, Greater Noida, 201306, U.P., India

    Pooja Saxena

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  1. Prashant Shukla
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Shukla, P., Saxena, P., Madhwal, D. et al. Prototyping a wearable and stretchable graphene-on-PDMS sensor for strain detection on human body physiological and joint movements. Microchim Acta 191, 301 (2024). https://doi.org/10.1007/s00604-024-06368-3

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