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Stretchable Array of Highly Sensitive Pressure Sensors Consisting of Polyaniline Nanofibers and Au-Coated Polydimethylsiloxane Micropillars.
ACS Nano. 2015 Oct 27; 9(10):9974-85.AN

Abstract

We report on the facile fabrication of a stretchable array of highly sensitive pressure sensors. The proposed pressure sensor consists of the top layer of Au-deposited polydimethylsiloxane (PDMS) micropillars and the bottom layer of conductive polyaniline nanofibers on a polyethylene terephthalate substrate. The sensors are operated by the changes in contact resistance between Au-coated micropillars and polyaniline according to the varying pressure. The fabricated pressure sensor exhibits a sensitivity of 2.0 kPa(-1) in the pressure range below 0.22 kPa, a low detection limit of 15 Pa, a fast response time of 50 ms, and high stability over 10000 cycles of pressure loading/unloading with a low operating voltage of 1.0 V. The sensor is also capable of noninvasively detecting human-pulse waveforms from carotid and radial artery. A 5 × 5 array of the pressure sensors on the deformable substrate, which consists of PDMS islands for sensors and the mixed thin film of PDMS and Ecoflex with embedded liquid metal interconnections, shows stable sensing of pressure under biaxial stretching by 15%. The strain distribution obtained by the finite element method confirms that the maximum strain applied to the pressure sensor in the strain-suppressed region is less than 0.04% under a 15% biaxial strain of the unit module. This work demonstrates the potential application of our proposed stretchable pressure sensor array for wearable and artificial electronic skin devices.

Authors+Show Affiliations

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNew Transportation Systems Research Center, Korea Railroad Research Institute , Uiwang-City, Gyeonggi-do 437-757, Republic of Korea.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26381467

Citation

Park, Heun, et al. "Stretchable Array of Highly Sensitive Pressure Sensors Consisting of Polyaniline Nanofibers and Au-Coated Polydimethylsiloxane Micropillars." ACS Nano, vol. 9, no. 10, 2015, pp. 9974-85.
Park H, Jeong YR, Yun J, et al. Stretchable Array of Highly Sensitive Pressure Sensors Consisting of Polyaniline Nanofibers and Au-Coated Polydimethylsiloxane Micropillars. ACS Nano. 2015;9(10):9974-85.
Park, H., Jeong, Y. R., Yun, J., Hong, S. Y., Jin, S., Lee, S. J., Zi, G., & Ha, J. S. (2015). Stretchable Array of Highly Sensitive Pressure Sensors Consisting of Polyaniline Nanofibers and Au-Coated Polydimethylsiloxane Micropillars. ACS Nano, 9(10), 9974-85. https://doi.org/10.1021/acsnano.5b03510
Park H, et al. Stretchable Array of Highly Sensitive Pressure Sensors Consisting of Polyaniline Nanofibers and Au-Coated Polydimethylsiloxane Micropillars. ACS Nano. 2015 Oct 27;9(10):9974-85. PubMed PMID: 26381467.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Stretchable Array of Highly Sensitive Pressure Sensors Consisting of Polyaniline Nanofibers and Au-Coated Polydimethylsiloxane Micropillars. AU - Park,Heun, AU - Jeong,Yu Ra, AU - Yun,Junyeong, AU - Hong,Soo Yeong, AU - Jin,Sangwoo, AU - Lee,Seung-Jung, AU - Zi,Goangseup, AU - Ha,Jeong Sook, Y1 - 2015/09/23/ PY - 2015/9/19/entrez PY - 2015/9/19/pubmed PY - 2016/8/5/medline KW - PDMS micropillar KW - artificial electronic skin KW - conductive polymer nanofiber KW - liquid metal interconnection KW - pressure sensor KW - stretchable array SP - 9974 EP - 85 JF - ACS nano JO - ACS Nano VL - 9 IS - 10 N2 - We report on the facile fabrication of a stretchable array of highly sensitive pressure sensors. The proposed pressure sensor consists of the top layer of Au-deposited polydimethylsiloxane (PDMS) micropillars and the bottom layer of conductive polyaniline nanofibers on a polyethylene terephthalate substrate. The sensors are operated by the changes in contact resistance between Au-coated micropillars and polyaniline according to the varying pressure. The fabricated pressure sensor exhibits a sensitivity of 2.0 kPa(-1) in the pressure range below 0.22 kPa, a low detection limit of 15 Pa, a fast response time of 50 ms, and high stability over 10000 cycles of pressure loading/unloading with a low operating voltage of 1.0 V. The sensor is also capable of noninvasively detecting human-pulse waveforms from carotid and radial artery. A 5 × 5 array of the pressure sensors on the deformable substrate, which consists of PDMS islands for sensors and the mixed thin film of PDMS and Ecoflex with embedded liquid metal interconnections, shows stable sensing of pressure under biaxial stretching by 15%. The strain distribution obtained by the finite element method confirms that the maximum strain applied to the pressure sensor in the strain-suppressed region is less than 0.04% under a 15% biaxial strain of the unit module. This work demonstrates the potential application of our proposed stretchable pressure sensor array for wearable and artificial electronic skin devices. SN - 1936-086X UR - https://www.unboundmedicine.com/medline/citation/26381467/Stretchable_Array_of_Highly_Sensitive_Pressure_Sensors_Consisting_of_Polyaniline_Nanofibers_and_Au_Coated_Polydimethylsiloxane_Micropillars_ L2 - https://dx.doi.org/10.1021/acsnano.5b03510 DB - PRIME DP - Unbound Medicine ER -