Graphdiyne-Based Nanofilms for Compliant On-Skin Sensing

Yichen Cai, Jie Shen, Jui-Han Fu, Nadeem Qaiser, Cailing Chen, Chien-Chih Tseng, Mariam Hakami, Zheng Yang, Hung-Ju Yen, Xiaochen Dong, Lain-Jong Li, Yu Han, Vincent Tung

Research output: Contribution to journalArticlepeer-review

Abstract

Thin-film electronics pliably laminated onto the epidermis for noninvasive, specific, and multifunctional sensing are ideal wearable systems for health monitoring and information technologies. However, it remains a critical challenge to fabricate ultrathin and compliant skin-like sensors with high imperceptibility and sensitivities. Here we report a design of conductive hydrogen-substituted graphdiyne (HsGDY) nanofilms with conjugated porous structure and inherent softness for on-skin sensors that allow minimization of stress and discomfort with wear. Dominated by the subtle deformation-induced changes in the interdomain tunneling conductance, the engineered HsGDY sensors show continuous and accurate results. Real-time noninvasive spatial mapping of dynamic/static strains in both tensile/compressive directions monitors various body motions with high sensitivity (GF ∼22.6, under 2% strain), fast response (∼60 ms), and long-term durability (∼5000 cycles). Moreover, such devices can dynamically distinguish between the temperature difference and frequency of air inhaled and exhaled through the nostril, revealing a quantitative assessment of the movement/health of the human body. The proof-of-concept strategy provides an alternative route for the design of next-generation wearable organic bioelectronics with multiple electronic functionalities.
Original languageEnglish (US)
JournalACS Nano
DOIs
StatePublished - Sep 20 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-09-26
Acknowledged KAUST grant number(s): OSR-2018-CARF/CCF-3079
Acknowledgements: V.T., Y.C.C., N.Q., and M.H. are indebted to the support from the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2018-CARF/CCF-3079. V.T. and Y.C.C. acknowledge the support from Research Translational Fund (RTF), KAUST Solar Center, and helpful discussions with L.C. from KAUST Core Lab. L.-J.L. acknowledges the support from the University of Hong Kong. Special thanks to Kate Chuang for the graphic design and illustration.

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Materials Science(all)
  • Engineering(all)

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