A Sensor Array Using Multifunctional Field-effect Transistors with Ultrahigh Sensitivity and Precision for Bio-monitoring

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Mechanically adaptive electronic skins (e-skins) emulate tactition and thermoception by cutaneous mechanoreceptors and thermoreceptors in human skin, respectively. When exposed to multiple stimuli including mechanical and thermal stimuli, discerning and quantifying precise sensing signals from sensors embedded in e-skins are critical. In addition, different detection modes for mechanical stimuli, rapidly adapting (RA) and slowly adapting (SA) mechanoreceptors in human skin are simultaneously required. Herein, we demonstrate the fabrication of a highly sensitive, pressureresponsive organic field-effect transistor (OFET) array enabling both RA- and SA- mode detection by adopting easily deformable, mechano-electrically coupled, microstructured ferroelectric gate dielectrics and an organic semiconductor channel. We also demonstrate that the OFET array can separate out thermal stimuli for thermoreception during quantification of SA-type static pressure, by decoupling the input signals of pressure and temperature. Specifically, we adopt piezoelectricpyroelectric coupling of highly crystalline, microstructured poly(vinylidene fluoride-trifluoroethylene) gate dielectric in OFETs with stimuli to allow monitoring of RA- and SA-mode responses to dynamic and static forcing conditions, respectively. This approach enables us to apply the sensor array to eskins for bio-monitoring of humans and robotics.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2015-07
Language
English
Article Type
Article
Keywords

REDUCED GRAPHENE OXIDE; SKIN TEMPERATURE; THRESHOLD VOLTAGE; PRESSURE; TRANSPARENT; ELECTRONICS; DEVICES; COMPOSITE; TOUCH; BODY

Citation

SCIENTIFIC REPORTS, v.5

ISSN
2045-2322
DOI
10.1038/srep12705
URI
http://hdl.handle.net/10203/240777
Appears in Collection
EE-Journal Papers(저널논문)
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