A Bioinspired Stretchable Sensory-Neuromorphic System.

Journal: Advanced materials (Deerfield Beach, Fla.)
PMID: 34510591

Abstract

Conventional stretchable electronics that adopt a wavy design, a neutral mechanical plane, and conformal contact between abiotic and biotic interfaces have exhibited diverse skin-interfaced applications. Despite such remarkable progress, the evolution of intelligent skin prosthetics is challenged by the absence of the monolithic integration of neuromorphic constituents into individual sensing and actuating components. Herein, a bioinspired stretchable sensory-neuromorphic system, comprising an artificial mechanoreceptor, artificial synapse, and epidermal photonic actuator is demonstrated; these three biomimetic functionalities correspond to a stretchable capacitive pressure sensor, a resistive random-access memory, and a quantum dot light-emitting diode, respectively. This system features a rigid-island structure interconnected with a sinter-free printable conductor, which is optimized by controlling the evaporation rate of solvent (≈160% stretchability and ≈18 550 S cm conductivity). Devised design improves both areal density and structural reliability while avoiding the thermal degradation of heat-sensitive stretchable electronic components. Moreover, even in the skin deformation range, the system accurately recognizes various patterned stimuli via an artificial neural network with training/inferencing functions. Therefore, the new bioinspired system is expected to be an important step toward implementing intelligent wearable electronics.

Authors

  • Sun Hong Kim
    Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, 08826, Republic of Korea.
  • Geun Woo Baek
    Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, 08826, Republic of Korea.
  • Jiyong Yoon
    Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
  • Seunghwan Seo
    Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea.
  • Jinhong Park
    The Institute for Basic Science, Inha University, Incheon, 22212, Republic of Korea.
  • Donghyo Hahm
    SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea.
  • Jun Hyuk Chang
    SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea.
  • Duhwan Seong
    Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
  • Hyunseon Seo
    Center for Biomaterials, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
  • Seyong Oh
    Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea.
  • Kyunghwan Kim
    Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, 08826, Republic of Korea.
  • Heeyoung Jung
    Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, 08826, Republic of Korea.
  • Youngsu Oh
    Display and Nanosystem Laboratory, Department of Electrical Engineering, Korea University, Seoul, 02841, Republic of Korea.
  • Hyoung Won Baac
    Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
  • Batyrbek Alimkhanuly
    Semiconductor Device & Integration Laboratory, Department of Electronic Engineering, Kyunghee University, Yongin, 17104, Republic of Korea.
  • Wan Ki Bae
    SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea.
  • Seunghyun Lee
    Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, USA. Electronic address: seunghyun.lee.22@gmail.com.
  • Minbaek Lee
    The Institute for Basic Science, Inha University, Incheon, 22212, Republic of Korea.
  • Jeonghun Kwak
    Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, 08826, Republic of Korea.
  • Jin-Hong Park
  • Donghee Son
    Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.

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