Bioelectronic sensors: from synthesis to device in water Dilara Gunturkun, Christian Nielsen Queen Mary University of London, UK
Organic electrochemical transistors (OECTs) are a central technology for bioelectronic devices in a wide range of applications such as biosensors 1 , memory 2 and neuromorphic devices 3 , and printed logic circuits 4 . To date, various conjugated polymeric materials have been developed to allow for both electronic and ionic charge transport throughout the bulk material, enabling efficient device operation in OECTs. The vast majority of polymers are synthesized using palladium-catalysed cross-coupling conditions and these conventional methods typically involve toxic halogenated solvents that adversely impact the environment and human health. In this work, an emulsion-based approach will be employed to obtain more sustainable materials preparation and processing protocols for bioelectronic applications. As well as the OECT device fabrication, materials synthesis and purification will be conducted using water as the main solvent to achieve n-type semiconducting polymers based on isoindigo backbones and hydrophilic side chains. Additionally, different molecular designs, electrochemical studies, OECT device evaluation, and computational investigation will be performed. References 1. J. H. Kim, S.-M. Kim, G. Kim, M.-H. Yoon, Macromolecular Bioscience 2020, 20 , 2000211. 2. J. Rivnay, S. Inal, A. Salleo, R. M. Owens, M. Berggren, G. G. Malliaras, Nature Reviews Materials 2018, 3 , 17086. 3. M.-K. Kim, Y. Park, I.-J. Kim, J.-S. Lee, iScience 2020, 23 , 101846. 4. X. Tian, D. Liu, J. Bai, K. S. Chan, L. C. Ip, P. K. L. Chan, S. Zhang, Anal. Chem. 2022, 94 , 6156.
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