Highly Ordered 3D Microstructure-Based Electronic Skin Capable of Differentiating Pressure, Temperature, and Proximity

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Electronic skin are devices that mimic the functionalities of human skin, which require high sensitivity, large dynamic range, high spatial uniformity, low-cost and large-area processability, and the capacity to differentiate various external inputs. We herein introduce a versatile droplet-based microfluidic-assisted emulsion self-assembly process to generate three-dimensional microstructure-based high-performance capacitive and piezoresistive pressure sensors for electronic skin applications. Our technique can generate uniformly sized micropores that are self assembled in an orderly close-packed manner over a large area, which results in high spatial uniformity. The size of the micropores can easily be tuned from 100 to 500 mu m, through which sensitivity and dynamic range were controlled as high as 0.86 kPa(-1) and up to 100 kPa. Our device can be printed on curvilinear surfaces and be molded into various shapes. We furthermore demonstrate that by simultaneously utilizing capacitive and piezoresistive pressure sensors, we can distinguish between pressure and temperature, or between pressure and proximity. These demonstrations make our process and sensors highly useful for a wide variety of electronic skin applications.
Publisher
AMER CHEMICAL SOC
Issue Date
2019-01
Language
English
Article Type
Article
Citation

ACS APPLIED MATERIALS & INTERFACES, v.11, no.1, pp.1503 - 1511

ISSN
1944-8244
DOI
10.1021/acsami.8b19214
URI
http://hdl.handle.net/10203/250384
Appears in Collection
ME-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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