Treenet ThepudomChutiparn LertvachirapaiboonKazunari ShinboKeizo KatoFutao KanekoTeerakiat KerdcharoenAkira BabaNiigata UniversityMahidol University2019-08-232019-08-232018-03-01MRS Communications. Vol.8, No.1 (2018), 107-11221596867215968592-s2.0-85042216333https://repository.li.mahidol.ac.th/handle/123456789/46088© Copyright Materials Research Society 2017. Detection of chlorpyrifos (CPF) using a surface plasmon resonance (SPR)-enhanced photoelectrochemical sensing system is demonstrated in this study. The presence of CPF was detected based on an increase in the short-circuit photocurrent when a sample is injected into the electrolyte at different concentrations. The short-circuit photocurrent signal was enhanced by both localized SPR of the gold nanoparticles and by the effects of grating-coupled propagating SPR. Using the hybrid SPR-enhancement system, CPF detection was achieved at concentrations as low as 7.5 nM. The proposed technique of leveraging a multifunctional photovoltaic effect can be used for a variety of sensing applications.Mahidol UniversityMaterials ScienceArticleSCOPUS10.1557/mrc.2017.131