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Kwon, Tae-Hyuk
Energy Recognition
Research Interests
  • Energy transfer, organic solar cells, supercapacitor, ultrasonic spray chemistry, dithienothiophene, iridium complexes, phosphorescent bioapplications

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Bioinspired, High-Sensitivity Mechanical Sensors Realized with Hexagonal Microcolumnar Arrays Coated with Ultrasonic-Sprayed Single-Walled Carbon Nanotubes

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Title
Bioinspired, High-Sensitivity Mechanical Sensors Realized with Hexagonal Microcolumnar Arrays Coated with Ultrasonic-Sprayed Single-Walled Carbon Nanotubes
Author
Jeong, ChangyoonKo, HangilKim, Hyun-TakSun, KahyunKwon, Tae-HyukJeong, Hoon EuiPark, Young-Bin
Issue Date
2020-04
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v.12, no.16, pp.18813 - 18822
Abstract
The development of a flexible electronic skin (e-skin) highly sensitive to multimodal vibrations and a specialized sensing ability is of great interest for a plethora of applications, such as tactile sensors for robots, seismology, healthcare, and wearable electronics. Here, we present an e-skin design characterized by a bioinspired, microhexagonal structure coated with single-walled carbon nanotubes (SWCNTs) using an ultrasonic spray method. We have demonstrated the outstanding performances of the device in terms of the capability to detect both static and dynamic mechanical stimuli including pressure, shear displacement, and bending using the principles of piezoresistivity. Because of the hexagonal microcolumnar array, whose contact area changes according to the mechanical stimuli applied, the interlock-optimized geometry shows an enhanced sensitivity. This produces an improved ability to discriminate the different mechanical stimuli that might be applied. Moreover, we show that our e-skins can detect, discriminate, and monitor various intensities of different external and internal vibrations, which is a useful asset for various applications, such as seismology, smart phones, wearable human skins (voice monitoring), etc.
URI
https://scholarworks.unist.ac.kr/handle/201301/32304
URL
https://pubs.acs.org/doi/10.1021/acsami.9b23370
DOI
10.1021/acsami.9b23370
ISSN
1944-8244
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