Date

Place

Room H (Room Hall 1, 1F)
P1. Poster Session I
August 20, 2015 (Thursday)
14:00 ~ 15:30

[P1-25]
14:00 ~ 15:30
Title:Skin-Inspired Stretchable Electronic Skins Differentiating Multi-Directional Tactile Stimuli
Jonghwa Park, Youngoh Lee, and Hyunhyub Ko (UNIST, Korea)
Abstract: Stretchable electronic skins with high sensitivities and multimodal sensing capabilities are of great interest for applications including robotic skins, prosthetics and healthcare monitoring systems. In human skin, the intermediate ridges at the epidermal-dermal junction are in the geometry of interlocked microstructures and enable to enhance tactile sensitivities due to stress concentration near the ridge tips. Inspired by the interlocked intermediate ridges of human skin, we herein introduce a novel design of stretchable piezoresistive electronic skins based on interlocking geometry of carbon nanotube composite elastomer films containing regular microdome-shaped arrays. These interlocked systems possess an extreme resistance-switching behavior and high sensitivity to pressure due to a giant tunneling piezoresistance between the microdome arrays. Contrary to conventional piezoresistive composite elastomer, our sensor also displays rapid response/relaxation times and a minimum dependence on temperature variation. Furthermore, our e-skin enables to differentiate various mechanical stimuli including normal, shear, stretching, bending, and twisting forces. For demonstration of the tactile-direction-sensitive and stretchable e-skin, we fabricated a fully functional wearable e-skin capable of selectively monitoring different intensities and directions of air flow and vibration stimuli. Finally, we shows that the e-skin can sensitively monitor human breathing flows and voice vibrations for applications in wearable human-healthcare monitoring systems.
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