Versatile self-assembled electrospun micropyramid arrays for high-performance on-skin devices with minimal sensory interference

Jia-Han Zhang, Zhengtong Li, Juan Xu, Jiean Li, Ke Yan, Wen Cheng, Ming Xin, Tangsong Zhu, Jinhua Du, Sixuan Chen, Xiaoming An, Zhou Zhou, Luyao Cheng, Shu Ying, Jing Zhang, Xingxun Gao, Qiuhong Zhang, Xudong Jia, Yi Shi () and Lijia Pan ()
Additional contact information
Jia-Han Zhang: Nanjing University
Zhengtong Li: Hohai University
Juan Xu: Shanxi Provincial People’s Hospital
Jiean Li: Nanjing University
Ke Yan: Nanjing University
Wen Cheng: Nanjing University
Ming Xin: Nanjing University
Tangsong Zhu: Nanjing University
Jinhua Du: Inner Mongolia University of Science and Technology
Sixuan Chen: Nanjing University
Xiaoming An: Nanjing University
Zhou Zhou: Nanjing University
Luyao Cheng: Nanjing University
Shu Ying: Nanjing University
Jing Zhang: Nanjing University
Xingxun Gao: Nanjing University
Qiuhong Zhang: Nanjing University
Xudong Jia: Nanjing University
Yi Shi: Nanjing University
Lijia Pan: Nanjing University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract On-skin devices that show both high performance and imperceptibility are desired for physiological information detection, individual protection, and bioenergy conversion with minimal sensory interference. Herein, versatile electrospun micropyramid arrays (EMPAs) combined with ultrathin, ultralight, gas-permeable structures are developed through a self-assembly technology based on wet heterostructured electrified jets to endow various on-skin devices with both superior performance and imperceptibility. The designable self-assembly allows structural and material optimization of EMPAs for on-skin devices applied in daytime radiative cooling, pressure sensing, and bioenergy harvesting. A temperature drop of ~4 °C is obtained via an EMPA-based radiative cooling fabric under a solar intensity of 1 kW m–2. Moreover, detection of an ultraweak fingertip pulse for health diagnosis during monitoring of natural finger manipulation over a wide frequency range is realized by an EMPA piezocapacitive-triboelectric hybrid sensor, which has high sensitivity (19 kPa−1), ultralow detection limit (0.05 Pa), and ultrafast response (≤0.8 ms). Additionally, EMPA nanogenerators with high triboelectric and piezoelectric outputs achieve reliable biomechanical energy harvesting. The flexible self-assembly of EMPAs exhibits immense potential in superb individual healthcare and excellent human-machine interaction in an interference-free and comfortable manner.

Date: 2022
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DOI: 10.1038/s41467-022-33454-y

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