Multiscale real time and high sensitivity ion detection with complementary organic electrochemical transistors amplifier

Paolo Romele, Paschalis Gkoupidenis, Dimitrios A. Koutsouras, Katharina Lieberth, Zsolt M. Kovács-Vajna, Paul W. M. Blom and Fabrizio Torricelli ()
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Paolo Romele: University of Brescia, Department of Information Engineering
Paschalis Gkoupidenis: Max Planck Institute for Polymer Research
Dimitrios A. Koutsouras: Max Planck Institute for Polymer Research
Katharina Lieberth: Max Planck Institute for Polymer Research
Zsolt M. Kovács-Vajna: University of Brescia, Department of Information Engineering
Paul W. M. Blom: Max Planck Institute for Polymer Research
Fabrizio Torricelli: University of Brescia, Department of Information Engineering

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract Ions are ubiquitous biological regulators playing a key role for vital processes in animals and plants. The combined detection of ion concentration and real-time monitoring of small variations with respect to the resting conditions is a multiscale functionality providing important information on health states. This multiscale functionality is still an open challenge for current ion sensing approaches. Here we show multiscale real-time and high-sensitivity ion detection with complementary organic electrochemical transistors amplifiers. The ion-sensing amplifier integrates in the same device both selective ion-to-electron transduction and local signal amplification demonstrating a sensitivity larger than 2300 mV V−1 dec−1, which overcomes the fundamental limit. It provides both ion detection over a range of five orders of magnitude and real-time monitoring of variations two orders of magnitude lower than the detected concentration, viz. multiscale ion detection. The approach is generally applicable to several transistor technologies and opens opportunities for multifunctional enhanced bioelectronics.

Date: 2020
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DOI: 10.1038/s41467-020-17547-0

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