title: Photocurrents at polarized liquid|liquid interfaces enhanced by a gold nanoparticle film.
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 (RC(int)) time constant of the cell.
authors: Laboratoire d'Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, Switzerland.
authors: Delphine
authors: D
authors: Schaming
authors: Mohamad
authors: M
authors: Hojeij
authors: Nathalie
authors: N
authors: Younan
authors: Hirohisa
authors: H
authors: Nagatani
authors: Hye Jin
authors: HJ
authors: Lee
authors: Hubert H
authors: HH
authors: Girault
mesh_terms: D000327:Adsorption; D005025:Ethylene Dichlorides / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry*; D000075163:Metallocenes; D010777:Photochemistry; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D005025:Ethylene Dichlorides; D005296:Ferrous Compounds; D008567:Membranes, Artificial; D000075163:Metallocenes; D014867:Water; C024565:ethylene dichloride; D006046:Gold; C004998:ferrocene