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Article Dans Une Revue Electrochemical and Solid-State Letters Année : 2005

Photosensitization of Boron-Doped Diamond by Surface Grafting of Pyrene Groups

Résumé

Boron-doped diamond samples were exposed successively to singlet oxygen and pyrene-alkylcarboxylic acid molecules. The resulting samples were studied by photoelectrochemistry. It is shown that the expected esterification reaction indeed allowed the grafting of pyrene groups onto the diamond surface. Cathodic photocurrents have been obtained with quantum yields as high as η=0.29% (λ=351 nm, U=-0.38 V vs. a saturated calomel electrode) in oxygen saturated electrolyte. The pyrene coverage is estimated from both photocurrent and photopotential measurements. The role of dissolved oxygen in the photocurrent generation is discussed.

Domaines

Matériaux
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Dates et versions

hal-00333059 , version 1 (22-10-2008)

Identifiants

Citer

Pierre Bouvier, Didier Delabouglise, Alain Denoyelle, Bernadette Marcus, Michel Mermoux, et al.. Photosensitization of Boron-Doped Diamond by Surface Grafting of Pyrene Groups. Electrochemical and Solid-State Letters, 2005, 8 (9), pp. E57-E61. ⟨10.1149/1.1979449⟩. ⟨hal-00333059⟩
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