title: Photochemical immobilization of proteins and peptides on benzophenone-terminated boron-doped diamond surfaces.
abstract: The successful covalent linking of green fluorescence protein and streptavidin to patterned benzophenone-modified boron-doped diamond (BDD) electrodes is demonstrated. Photoreactive benzophenone moieties were covalently grafted to oxidized diamond surfaces via an esterification reaction. Patterned BDD surfaces were obtained using a UV/ozone lithographic approach either on hydrogen-terminated BDD or on poly(ethylene)-glycol-modified BDD surfaces. UV light (lambda = 365 nm) irradiation of the patterned BDD surfaces in the presence of green fluorescence protein (GFP) or streptavidin resulted in the covalent immobilization of the proteins. The presence of poly(ethylene) glycol chains reduces significantly the nonspecific adsorption of the proteins. The success of the photoimmobilization of streptavidin was evidenced through biomolecular interaction with avidin. The preservation of the biological activity was furthermore underlined by photoimmobilization of peptides directly onto benzophenone modified BDD using a photomask.
authors.affiliation: Institut de Recherche Interdisciplinaire (IRI, USR 3078), Parc de la Haute Borne, 50 Avenue de Halley, BP 70478, 59658 Villeneuve d'Ascq, France.
authors.forename: Lionel
authors.initials: L
authors.lastname: Marcon
authors.forename: Mei
authors.initials: M
authors.lastname: Wang
authors.forename: Yannick
authors.initials: Y
authors.lastname: Coffinier
authors.forename: Francois
authors.initials: F
authors.lastname: Le Normand
authors.forename: Oleg
authors.initials: O
authors.lastname: Melnyk
authors.forename: Rabah
authors.initials: R
authors.lastname: Boukherroub
authors.forename: Sabine
authors.initials: S
authors.lastname: Szunerits
mesh_terms: D001360:Avidin / Q000737:chemistry; D001895:Boron / Q000737:chemistry*; D018130:Diamond / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods*; D049452:Green Fluorescent Proteins / Q000737:chemistry; D010455:Peptides / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry; D011506:Proteins / Q000737:chemistry*; D019809:Streptavidin / Q000737:chemistry
chemical_list: D010455:Peptides; D011506:Proteins; D001360:Avidin; D049452:Green Fluorescent Proteins; D011092:Polyethylene Glycols; D018130:Diamond; D019809:Streptavidin; D001895:Boron