[18p-P04-1~15] 12.2 Characterization and Materials Physics

English Presentation

[18p-P04-13] Surface plasmon resonance-enhanced photoelectrochemical flexible biosensor using PEDOT:PSS thin film with AuNPs on PDMS substrate

〇(D)Charin Seesomdee¹, Sachiko Jonai¹, Kazunari Shinbo¹, Keizo Kato¹, Akira Baba*¹ (1.Niigata Univ.)

Keywords:

surface plasmon resonance,photoelectrochemical (PEC) sensor

In this work, a photoelectrochemical (PEC) flexible glucose sensor based on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) with gold nanoparticles (AuNPs) on polydimethylsiloxane (PDMS) layers is presented [1]. To enhance the photoelectrochemical response, AuNPs were introduced in the PEDOT:PSS layer to utilize localized surface plasmon. PDMS was used as a flexible sensor substrate material. To study the performance of the flexible sensor, the PEDOT:PSS with AuNPs on glass substrate was used as a reference sensor. Furthermore, grating pattern was fabricated on the PDMS substrate to study the effect of propagating surface plasmon resonance in addition to the localized surface plasmon. A substrate was prepared by depositing 50 nm of gold (Au) on both flexible and glass substrates via thermal evaporation. The PEDOT:PSS and AuNPs film layers were prepared by the cyclic voltammetry (CV) method [2]. The ability to facilitate electrochemical doping and higher charge density of PEDOT:PSS and AuNPs layers can enhance the performance of PEC flexible glucose sensor [3]. The PEC sensing properties studied under white light illumination demonstrated the enhanced photocurrent of a fabricated flexible sensor due to excitation of localized surface plasmon resonance excitation and propagating surface plasmon.