title: Modification of indium-tin oxide (ITO) glass with aziridine provides a surface of high amine density.
abstract: The surface of indium-tin oxide (ITO) substrates was successfully modified with aziridine. Modification of the surface was achieved through facile ring-opening, and hyperbranching polymerization of the ring-strained heterocycle initiated from the reactive group on the surface. Amine density of the aziridine-modified ITO measured with UV-vis spectrophotometry is 10 amines/nm2. Cyclic voltammetric analysis showed that the aziridine-modified electrode was less active for Ru(NH3)6(3+) in comparison with the pristine electrode, while no difference was observed for Fe(CN)6(4-). Electrochemical impedance spectroscopic experiments unveiled that the modified electrode was more efficient for electron transfer to the latter species than to the former.
authors.affiliation: Center for Integrated Molecular Systems, Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, South Korea.
authors.forename: Chang Ok
authors.initials: CO
authors.lastname: Kim
authors.forename: Sun-Young
authors.initials: SY
authors.lastname: Hong
authors.forename: Minju
authors.initials: M
authors.lastname: Kim
authors.forename: Su-Moon
authors.initials: SM
authors.lastname: Park
authors.forename: Joon Won
authors.initials: JW
authors.lastname: Park
mesh_terms: D000588:Amines / Q000737:chemistry*; D001388:Aziridines / Q000737:chemistry*; D004563:Electrochemistry; D005898:Glass / Q000737:chemistry*; D007204:Indium / Q000737:chemistry*; D013499:Surface Properties; D017971:Tin Compounds / Q000737:chemistry*
chemical_list: D000588:Amines; D001388:Aziridines; D017971:Tin Compounds; D007204:Indium; C033132:aziridine; C045358:stannic oxide