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Issue 39, 2011
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Photocurrents at polarized liquid|liquid interfaces enhanced by a gold nanoparticle film

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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 water|1,2-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.

Graphical abstract: Photocurrents at polarized liquid|liquid interfaces enhanced by a gold nanoparticle film

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Supplementary files

Article information


Submitted
24 Jun 2011
Accepted
17 Aug 2011
First published
09 Sep 2011

Phys. Chem. Chem. Phys., 2011,13, 17704-17711
Article type
Paper

Photocurrents at polarized liquid|liquid interfaces enhanced by a gold nanoparticle film

D. Schaming, M. Hojeij, N. Younan, H. Nagatani, H. J. Lee and H. H. Girault, Phys. Chem. Chem. Phys., 2011, 13, 17704
DOI: 10.1039/C1CP22072A

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