Presentation Information
[8a-P07-10]Surface Plasmon Resonance-enhanced Photoelectrochemical Flexible Sensor based on PEDOT:PSS Thin Film with Nanostructured Gold Electrode
〇(DC)Charin Seesomdee1, Sachiko Jonai1, Kazunari Shinbo1, Akira Baba1 (1.Niigata Univ.)
Keywords:
surface plasmon resonance,photoelectrochemical (PEC) sensor
A flexible photoelectrochemical (PEC) glucose sensor is presented, incorporating a poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) thin film integrated with gold nanoparticles (AuNPs) and a grating-structured gold (Au) electrode on a polydimethylsiloxane (PDMS) substrate [1]. The sensor harnesses both localized surface plasmon resonance (LSPR) from AuNPs and grating-coupled surface plasmon resonance (SPR) from the nanostructured Au substrate to enhance light absorption and facilitate glucose oxidation [2]. AuNPs are deposited via electrochemical methods to increase charge density and improve electrochemical doping within the PEDOT:PSS film, significantly enhancing PEC performance [3]. Under white light illumination, the grating-AuNP sensor exhibited an enhanced photocurrent response with a limit of detection (LOD) of 0.35 mM. Flexibility testing under various bending conditions showed only a slight reduction in sensitivity, and the results indicated that the AuNPs remained stable and continued to contribute effectively to sensor performance. These findings confirm the sensor's potential for practical, wearable biosensing applications. This study demonstrates the synergistic role of plasmonic enhancement and conductive polymers in achieving high-performance, flexible PEC glucose sensors.