Photocurrents at polarized liquidliquid interfaces enhanced by a gold nanoparticle film

Delphine Schaming, Mohamad Hojeij, Nathalie Younan, Hirohisa Nagatani, Hye Jin Lee, Hubert H. Girault

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Photocurrent responses associated with the interfacial quenching of the photo-excited water-soluble zinc meso-tetra(4-carboxyphenyl)porphyrin (ZnTPPC) by ferrocene have been studied at a water1,2-dichloroethane interface in the absence and in the presence of adsorbed gold nanoparticles. Upon addition of methanol, a mirror-like gold film is formed and an important enhancement of the photocurrent response can be observed. Intensity modulated photocurrent spectroscopy experiments (IMPS) have been performed, in order to deconvolute in the frequency domain the contribution from the competition between the recombination and the product separation arising after the electron transfer, and the attenuation associated with the resistance and interfacial capacitance (RCint) time constant of the cell. This journal is

Original languageEnglish
Pages (from-to)17704-17711
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number39
DOIs
StatePublished - 21 Oct 2011

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