Abstract: Compact chemical sensors are in high demand for on-site detection of targets in aqueous media. Water-gated organic thin-film transistors (WG-OTFTs) fabricated by a simple procedure are among the most promising candidates for such sensors owing to their advantages. Especially, WG-OTFTs can be operated at an ultralow voltage (<1 V) that avoids undesirable electrochemical reactions. Hence, this speaker has developed WG-OTFT-based sensors using a chemical stimulus-responsive polymer, for which the changes in the electric double layer capacitance (EDLC) by accumulation and desorption of charged species are a key sensing mechanism. The speaker believes that the sensing strategy developed here based on WG-PTFTs can contribute to improving the quality of life in real-world scenarios.

Keywords: organic field-effct transistors, water, sensor

Biography: Tsuyoshi Minami received his PhD (Eng) from Tokyo Metropolitan University (Japan) in 2011. During his PhD studies he worked at University of Bath (UK) on collaborative projects. Between 2011 and 2013 he was a Postdoctoral Research Associate at Bowling Green State University (US). In 2013 he was appointed as a Research Assistant Professor at the same University. Then he moved to Yamagata University (Japan) as an Assistant Professor in 2014. He was appointed as a Lecturer at The University of Tokyo in 2016, and then he has been an Associate Professor since 2019 at the same University.