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- W2810278567 abstract "The development of portable and wearable sensors is of high importance in several fields such as point-of-care medical applications and environmental monitoring. Here we design, synthesize and exploit a new composite material based on Ag/AgCl nanoparticles and PEDOT:PSS (poly(3,4-ethylenedioxythiophene) poly(styrene sulfonate)) to fabricate a novel kind of sensor inspired by the organic electrochemical transistor (OECT). We are able to integrate an Ag/AgCl gate electrode into the semiconducting polymer in the form of NPs. As a consequence, our sensor combines an intrinsically amplified response with a simple two terminal electrical connection. Electrostatic Force Microscopy and Electrochemical Impedance Spectroscopy demonstrate the electronic coupling between the electrochemically active nanoparticles and the ionic charge gated semiconducting polymer, allowing to explain the sensor amplified transduction. The analytical signal is the current that flows in the composite polymer and its variation is directly proportional to the logarithm of Cl− concentration in the range 10−4 to 1 M, with a limit of detection of 0.5 10−4 M. Moreover, the device exhibits a shorter response time than the one of a conventional OECT endowed with an Ag/AgCl gate electrode. The sensor was used for in-situ detection of salinity in water and a textile device was obtained by depositing the composite material directly onto a cotton yarn for real-time sweat monitoring." @default.
- W2810278567 created "2018-07-10" @default.
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- W2810278567 date "2018-11-01" @default.
- W2810278567 modified "2023-10-11" @default.
- W2810278567 title "Nanoparticle gated semiconducting polymer for a new generation of electrochemical sensors" @default.
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- W2810278567 doi "https://doi.org/10.1016/j.snb.2018.06.109" @default.
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