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- W2230139604 abstract "Abstract Measurement of femtoscale displacements in the ultrasonic frequency range is attractive for advanced material characterization and sensing, yet major challenges remain in their reliable transduction using non-optical modalities, which can dramatically reduce the size and complexity of the transducer assembly. Here we demonstrate femtoscale displacement transduction using an AlGaN/GaN heterojunction field effect transistor-integrated GaN microcantilever that utilizes piezoelectric polarization-induced changes in two-dimensional electron gas to transduce displacement with very high sensitivity. The piezotransistor demonstrated an ultra-high gauge factor of 8,700 while consuming an extremely low power of 1.36 nW, and transduced external excitation with a superior noise-limited resolution of 12.43 fm Hz −1/2 and an outstanding responsivity of 170 nV fm −1 , which is comparable to the optical transduction limits. These extraordinary characteristics, which enabled unique detection of nanogram quantity of analytes using photoacoustic spectroscopy, can be readily exploited in realizing a multitude of novel sensing paradigms." @default.
- W2230139604 created "2016-06-24" @default.
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- W2230139604 date "2015-08-10" @default.
- W2230139604 modified "2023-09-29" @default.
- W2230139604 title "Piezotransistive transduction of femtoscale displacement for photoacoustic spectroscopy" @default.
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- W2230139604 doi "https://doi.org/10.1038/ncomms8885" @default.
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