Multiple plasmonic effect on photocurrent generation of metal-loaded titanium dioxide composite/dye films on gold grating surface

• Main Authors: Weerasak Chomkitichai, Hathaithip Ninsonti, Akira Baba, Sukon Phanichphant, Kazunari Shinbo, Keizo Kato, Futao Kaneko
• Format: Journal
• Published: 2018
• Subjects: Chemistry; Materials Science; Physics and Astronomy
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84906787888&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/53361
• Institution: Chiang Mai University

We demonstrate the multiple plasmonic effect on the photocurrent properties of photoanodes containing Ag or Au nanoparticles (NPs) loaded onto titanium dioxide film (Ag-TiO2 or Au-TiO2) on Au grating surfaces. Ag-TiO2 or Au-TiO2 nanocomposite particles are prepared by a flame spray pyrolysis route. The structures and morphologies of the prepared products are characterized by high-resolution transmission electron microscopy. The Ag-TiO2 or Au-TiO2 composite NPs are deposited by spin coating onto the Au grating surfaces. The photoanode electrode is a layered structure of blu-ray disc-recordable grating substrate/Au/Ag (or Au)-TiO 2/dye/electrolyte/indium-tin oxide. The plasmonic effect is induced when Ag or Au NPs are located within the propagating surface plasmon (SP) field on the Au grating surface. The short-circuit photocurrent is increased by exciting the grating-coupled propagating SP on the Au gratings and is further enhanced by positioning the Ag or Au NPs within the grating-coupled SP field. Copyright © 2014 John Wiley & Sons, Ltd.