High-sensitivity ion detection at low voltages with current-driven organic electrochemical transistors.

ABSTRACT: Ions dissolved in aqueous media play a fundamental role in plants, animals, and humans. Therefore, the in situ quantification of the ion concentration in aqueous media is gathering relevant interest in several fields including biomedical diagnostics, environmental monitoring, healthcare products, water and food test and control, agriculture industry and security. The fundamental limitation of the state-of-art transistor-based approaches is the intrinsic trade-off between sensitivity, ion concentration range and operating voltage. Here we show a current-driven configuration based on organic electrochemical transistors that overcomes this fundamental limit. The measured ion sensitivity exceeds by one order of magnitude the Nernst limit at an operating voltage of few hundred millivolts. The i

SUBMITTER: Ghittorelli M 

PROVIDER: S-EPMC5897342 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature