External-Noise-Induced Small-Signal Detection with Solution-Gated Carbon Nanotube Transistor
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概要
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A solution-gated carbon nanotube field-effect transistor (CNTFET) based on stochastic resonance (SR) was investigated in order to enhance small-signal detection under ambient noise conditions. When noise of optimal intensity was introduced at the reference electrode in a nonlinear CNTFET, the electric double layer in the solution was modulated, resulting in SR behavior. Moreover, when the CNTFET was used as a pH sensor, high sensitivity was achieved, which enabled the detection of small differences in pH. The best results were obtained in a noisy environment; therefore, a solution-gated SR-based CNTFET operated in the subthreshold regime is a promising high-sensitivity sensor.
- 2011-04-25
著者
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Maehashi Kenzo
The Institute Of Scientific And Industrial Research Osaka University
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Ohno Yasuhide
The Institute Of Scientific And Industrial Research Osaka University
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Matsumoto Kazuhiko
The Institute Of Scientific And Industrial Research Osaka University
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Inoue Koichi
The Institute For Solid State Physics University Of Tokyo
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Ohno Yasuhide
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
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Hakamata Yasufumi
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
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