Ultra-sensitive Pressure sensor based on guided straight mechanicalcracks

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486676.do
DOI
10.1038/srep40116
Title
Ultra-sensitive Pressure sensor based on guided straight mechanicalcracks
Description
This work was supported by the Global Frontier R&D Program of the Centerfor Multiscale Energy Systems funded by the National Research Foundationunder the Ministry of Science, ICT and Future Planning, Korea (Grant Nos2011-0031561 and 2012M3A6A7054855).
abstract
Recently, a mechanical crack-based strain sensor with high sensitivity was proposed by producing free cracks via bending metal coated film with a known curvature. To further enhance sensitivity and controllability, a guided crack formation is needed. Herein, we demonstrate such a ultra-sensitive sensor based on the guided formation of straight mechanical cracks. The sensor has patterned holes on the surface of the device, which concentrate the stress near patterned holes leading to generate uniform cracks connecting the holes throughout the surface. We found that such a guided straight crack formation resulted in an exponential dependence of the resistance against the strain, overriding known linear or power law dependences. Consequently, the sensors are highly sensitive to pressure (with a sensitivity of over 1 x 10(5) at pressures of 8-9.5 kPa range) as well as strain (with a gauge factor of over 2 x 10(6) at strains of 0-10% range). A new theoretical model for the guided crack system has been suggested to be in a good agreement with experiments. Durability and reproducibility have been also confirmed.
provenance
Made available in Cube on 2018-09-28T16:13:58Z (GMT). No. of bitstreams: 0
language
English
author
Choi, Yong Whan
Kang, Daeshik
Pikhitsa, Peter V.
Lee, Taemin
Kim, Sang Moon
Lee, Gunhee
Tahk, Dongha
Choi, Mansoo
accessioned
2018-09-28T16:13:58Z
available
2018-09-28T16:13:58Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486676.do
Funder
교육부
Funding Program
BK21플러스사업(0.5)
Project ID
1345274022
Jurisdiction
Rep.of Korea
Project Name
BK21+ Transformative Training Program for Creative Mechanical and Aerospace Engineers
rights
openAccess
type
article


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