Development in nanoscale crack based sensors for advanced wearable electronics
Tae-il Kim a
a School of Chemical Engineering, Sungkyunkwan University (SKKU), KR, Suwon, Korea, Republic of
Proceedings of Neural Interfaces and Artificial Senses (NIAS)
Online, Spain, 2021 September 22nd - 23rd
Organizers: Tiago Costa and Georgios Spyropoulos
Invited Speaker, Tae-il Kim, presentation 014
Publication date: 13th September 2021

Arachnids are among the most sensitive creatures on the Earth.  Especially, their mechano-sensory system embedded in the crack-shaped slit organ made of stiff exoskeleton over a cuticular pad near leg joints is known to sense a tiny variation of mechanical stress, thereby, serve as an ultra-sensitive vibration sensor. In this talk, we introduce spider inspired mechanosensors having an ultrasensitivity, durability with high signal-to-noise-ratio. [1] The device fabricated on a sheet of plastic is reproducible, mechanically flexible and shape-deformable so that they can be easily mounted on human skin as skin electronic with multi-pixel arrays. The spider inspired sensory system would provide versatile novel applications utilized in ultra-high sensitivity on displacements. Moreover, it will deal with crack geometry dependency [2], enhanced durability using self-healing polymer [3], strain visualization [4], and noise-damping properties. 

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