Recent advances in bioinspired nano/microstructures have received attention as promising approaches with which to implement smart skin-interfacial devices for personalized health care. In situ skin diagnosis requires adaptable skin adherence and rapid capture of clinical biofluids. Here, we report a simple, all-in-one device consisting of microplungers and hydrogels that can rapidly capture biofluids and conformally attach to skin for stable, real-time monitoring of health. Inspired by the male diving beetle, the microplungers achieve repeatable, enhanced, and multidirectional adhesion to human skin in dry/wet environments, revealing the role of the cavities in these architectures. The hydrogels within the microplungers instantaneously absorb liquids from the epidermis for enhanced adhesiveness and reversibly change color for visual indication of skin pH levels. To realize advanced biomedical technologies for the diagnosis and treatment of skin, our suction-mediated device is integrated with a machine learning framework for accurate and automated colorimetric analysis of pH levels.
Bibliographical noteFunding Information:
We gratefully acknowledge support from the National Research Foundation of Korea (NRF-2019R1C1C1008730). This work has been conducted with the support of the Korea Health Technology R&D Project (grant HP20C0078). This work was supported by the Korea Evaluation Institute of Industrial Technology (KEIT) grant funded by the Korean government (MSIT) (No. 20009125). This work was also supported by the Institute for Basic Science (IBS-R026-D1).
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