講演情報
[15a-P05-13]Surface plasmon resonance-enhanced photoelectrochemical flexible sensor using PEDOT:PSS thin film/nanostructured Au
〇(D)Charin Seesomdee1, Sachiko Jonai1, Kazunari Shinbo1, Akira Baba1 (1.Niigata Univ.)
キーワード：
surface plasmon resonance、photoelectrochemical (PEC) sensor
This study presents a flexible photoelectrochemical (PEC) glucose sensor that integrates gold nanoparticles (AuNPs) and gold (Au) nanostructures on polydimethylsiloxane (PDMS) substrates. The sensor utilizes poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) [1] , with a 50 nm Au layer deposited onto the substrate via vacuum evaporation, acting as a catalyst for glucose oxidation [2] . AuNPs were added to the PEDOT:PSS layer to utilize localized surface plasmon resonance (LSPR), enhancing the photoelectrochemical response. Both the PEDOT:PSS and AuNP films were formed using electrochemical deposition techniques. This work utilizes the LSPR and catalytic properties of gold as key factors to enhance glucose detection on flexible PDMS substrates, ensuring adaptability for various sensor applications. To evaluate the performance of the flexible sensor, a reference sensor was fabricated using PEDOT:PSS and AuNPs on a glass substrate. To further amplify the sensing response, an Au/PDMS grating substrate was developed to excite propagating surface plasmon resonance. The combination of PEDOT:PSS and AuNPs enabled improved electrochemical doping and increased charge density, significantly boosting the PEC sensor's performance [3] . The Au/PDMS grating substrate demonstrated a limit of detection (LOD) of 0.38 mM under light conditions, outperforming the gold-coated glass substrate in terms of sensitivity. Under white light illumination, the sensor exhibited an enhanced photocurrent, attributed to LSPR excitation, confirming its potential for efficient glucose sensing.