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  • Title: Liquid and back gate coupling effect: toward biosensing with lowest detection limit.
    Author: Pud S, Li J, Sibiliev V, Petrychuk M, Kovalenko V, Offenhäusser A, Vitusevich S.
    Journal: Nano Lett; 2014 Feb 12; 14(2):578-84. PubMed ID: 24392670.
    Abstract:
    We employ noise spectroscopy and transconductance measurements to establish the optimal regimes of operation for our fabricated silicon nanowire field-effect transistors (Si NW FETs) sensors. A strong coupling between the liquid gate and back gate (the substrate) has been revealed and used for optimization of signal-to-noise ratio in subthreshold as well as above-threshold regimes. Increasing the sensitivity of Si NW FET sensors above the detection limit has been predicted and proven by direct experimental measurements.
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