Flexible silk-based graphene bioelectronics for wearable multimodal physiological monitoring

Mirbakht, Seyed Sajjad and Jedari Golparvar, Ata and Umar, Muhammad and Yapıcı, Murat Kaya (2023) Flexible silk-based graphene bioelectronics for wearable multimodal physiological monitoring. In: IEEE 36th International Conference on Micro Electro Mechanical Systems (MEMS), Munich, Germany

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We introduce a skin-inspired epidermal bioelectronic patch (EBP) with unprecedented integration of graphene on silk with a facile and cost-effective fabrication process, excluding complex ink formulation. We advance the state-of-the-art by directly screen-printing pristine graphene ink on "donor"substrates like polyethylene terephthalate (PET) and successfully receiving the printed graphene traces onto silk protein-based "carrier"substrates by a controlled drop-casting, curing, and transfer printing process. The presented approach retains the conductivity of the pristine graphene ink prepared by reducing graphene oxide suspension through "green"chemistry based on a water-soluble vitamin C reagent. We demonstrate that silk/graphene epidermal patches (SGEP) can conformally attach to human skin without additional adhesives or gel materials. Our study reveals a superior response of the SGEP by successfully acquiring multimodal physiological signals such as cardiac-ECG, macular-EMG, and ocular-EOG with almost perfect correlation reaching a record high of 98.48% to those recorded simultaneously with medical-grade, pre-gelled with adhesive backings, wet Ag/AgCl electrodes.
Item Type: Papers in Conference Proceedings
Uncontrolled Keywords: continuous monitoring; Electronic skin (e-skin); epidermal bioelectronics patch; flexible electronics; green electronics; reduced graphene oxide (rGO); silk protein; skin-like electronics
Divisions: Faculty of Engineering and Natural Sciences
Sabancı University Nanotechnology Research and Application Center
Depositing User: Murat Kaya Yapıcı
Date Deposited: 10 May 2023 15:32
Last Modified: 10 May 2023 15:32
URI: https://research.sabanciuniv.edu/id/eprint/45537

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