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- W2027242007 abstract "In this article, we propose a Flexure-FET (flexure sensitive field effect transistor) ultrasensitive biosensor that utilizes the nonlinear electromechanical coupling to overcome the fundamental sensitivity limits of classical electrical or mechanical nanoscale biosensors. The stiffness of the suspended gate of Flexure-FET changes with the capture of the target biomolecules, and the corresponding change in the gate shape or deflection is reflected in the drain current of FET. The Flexure-FET is configured to operate such that the gate is biased near pull-in instability, and the FET-channel is biased in the subthreshold regime. In this coupled nonlinear operating mode, the sensitivity ( S ) of Flexure-FET with respect to the captured molecule density ( N s ) is shown to be exponentially higher than that of any other electrical or mechanical biosensor. In other words, while , classical electrical or mechanical biosensors are limited to S classical ∼ γ 3 N S or γ 4 ln( N S ), where γ i are sensor-specific constants. In addition, the proposed sensor can detect both charged and charge-neutral biomolecules, without requiring a reference electrode or any sophisticated instrumentation, making it a potential candidate for various low-cost, point-of-care applications." @default.
- W2027242007 created "2016-06-24" @default.
- W2027242007 creator A5012580097 @default.
- W2027242007 creator A5024989229 @default.
- W2027242007 creator A5062737334 @default.
- W2027242007 date "2012-05-23" @default.
- W2027242007 modified "2023-10-16" @default.
- W2027242007 title "Flexure-FET biosensor to break the fundamental sensitivity limits of nanobiosensors using nonlinear electromechanical coupling" @default.
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- W2027242007 doi "https://doi.org/10.1073/pnas.1203749109" @default.
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