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Sensors 2015, 15(9), 22914-22940; doi:10.3390/s150922914

Piezotronic Effect: An Emerging Mechanism for Sensing Applications

Department of Mechanical Engineering, University of Minnesota—Twin Cities, 111 Church Street SE, Minneapolis, MN 55446, USA
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Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 14 August 2015 / Revised: 3 September 2015 / Accepted: 7 September 2015 / Published: 11 September 2015
(This article belongs to the Section Physical Sensors)
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Abstract

Strain-induced polarization charges in a piezoelectric semiconductor effectively modulate the band structure near the interface and charge carrier transport. Fundamental investigation of the piezotronic effect has attracted broad interest, and various sensing applications have been demonstrated. This brief review discusses the fundamentals of the piezotronic effect, followed by a review highlighting important applications for strain sensors, pressure sensors, chemical sensors, photodetectors, humidity sensors and temperature sensors. Finally, the review offers some perspectives and outlook for this new field of multi-functional sensing enabled by the piezotronic effect. View Full-Text
Keywords: piezotronic; strain sensor; pressure sensor; gas sensor; biosensor; chemical sensor; photodetector; temperature sensor; zinc oxide; nanowire piezotronic; strain sensor; pressure sensor; gas sensor; biosensor; chemical sensor; photodetector; temperature sensor; zinc oxide; nanowire
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Jenkins, K.; Nguyen, V.; Zhu, R.; Yang, R. Piezotronic Effect: An Emerging Mechanism for Sensing Applications. Sensors 2015, 15, 22914-22940.

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