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arXiv · 1311.7628

Liquid and back gate coupling effect: towards biosensing with lowest detection limit

Sergii Pud·Jing Li·Volodymyr Sibiliev·Mykhaylo Petrychuk·Valery Kovalenko·Andreas Offenhäusser·Svetlana Vitusevich
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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 optimisation of signal-to-noise ratio in sub-threshold 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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Sergii Pud, Jing Li, Volodymyr Sibiliev, Mykhaylo Petrychuk, Valery Kovalenko, Andreas Offenhäusser, Svetlana Vitusevich. 2013-11-29. Liquid and back gate coupling effect: towards biosensing with lowest detection limit. https://doi.org/10.1021/nl403748x

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