Locally Controlled Sensing Properties of Stretchable Pressure Sensors Enabled by Micro-Patterned Piezoresistive Device Architecture.

Sensors
Jun Ho LeeSung Kyu Park

Abstract

For wearable health monitoring systems and soft robotics, stretchable/flexible pressure sensors have continuously drawn attention owing to a wide range of potential applications such as the detection of human physiological and activity signals, and electronic skin (e-skin). Here, we demonstrated a highly stretchable pressure sensor using silver nanowires (AgNWs) and photo-patternable polyurethane acrylate (PUA). In particular, the characteristics of the pressure sensors could be moderately controlled through a micro-patterned hole structure in the PUA spacer and size-designs of the patterned hole area. With the structural-tuning strategies, adequate control of the site-specific sensitivity in the range of 47~83 kPa-1 and in the sensing range from 0.1 to 20 kPa was achieved. Moreover, stacked AgNW/PUA/AgNW (APA) structural designed pressure sensors with mixed hole sizes of 10/200 µm and spacer thickness of 800 µm exhibited high sensitivity (~171.5 kPa-1) in the pressure sensing range of 0~20 kPa, fast response (100~110 ms), and high stretchability (40%). From the results, we envision that the effective structural-tuning strategy capable of controlling the sensing properties of the APA pressure sensor would be employed in a large...Continue Reading

References

Jul 13, 2012·Advanced Materials·Feng Xu, Yong Zhu
Feb 5, 2014·Advanced Materials·Nguyen Thanh TienJong-Jin Park
Feb 6, 2014·Nature Communications·Shu GongWenlong Cheng
Nov 2, 2014·Advanced Materials·Changhyun PangZhenan Bao
Dec 10, 2014·Nature Communications·Jaemin KimDae-Hyeong Kim
Sep 4, 2015·Advanced Materials·Baoqing NieTingrui Pan
Oct 17, 2015·Science·Benjamin C-K TeeZhenan Bao
Jan 26, 2016·Nature Nanotechnology·Sungwon LeeTakao Someya
Apr 21, 2020·Advanced Materials·Jun Ho LeeSung Kyu Park

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BETA
scanning electron microscopy

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