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- W4281832364 abstract "Abstract By simultaneously transducing and amplifying, transistors offer advantages over simpler, electrode-based transducers in electrochemical biosensors. However, transistor-based biosensors typically use static ( i . e ., DC) operation modes that are poorly suited for sensor architectures relying on the modulation of charge transfer kinetics to signal analyte binding. Thus motivated, here we translate the AC “pulsed potential” approach typically used with electrochemical aptamer-based sensor to an organic electrochemical transistor (OECT). Specifically, by applying a linearly sweeping square-wave potential to an aptamer-functionalized gate electrode, we produce current modulation across the transistor channel two orders of magnitude larger than seen for the equivalent, electrode-based biosensor. Critically, the resulting amplification is scalable, such that there is no signal loss with OECT miniaturization. The pulsed transistor operation demonstrated here could be applied generally to sensors relying on kinetics-based signaling, expanding opportunities for non-invasive and high spatial resolution biosensing." @default.
- W4281832364 created "2022-06-13" @default.
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- W4281832364 date "2022-06-11" @default.
- W4281832364 modified "2023-10-17" @default.
- W4281832364 title "Pulsed transistor operation enables miniaturization of electrochemical aptamer–based sensors" @default.
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- W4281832364 doi "https://doi.org/10.1101/2022.06.09.495532" @default.
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