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    Atom-Transfer Radical Polymerization on Zinc Oxide Nanowires

    Year: 2006

    Journal: Chem. Mater.18 (2006) 5045-5051, 20111221

    Authors: Benjamin L. Rupert, Martin J. Mulvihill, and John Arnold

    Organizations: Department of Chemistry, University of California, Berkeley, California 94720

    Atom-transfer radical polymerization (ATRP) has been used to modify the surface of ZnO nanowires with a variety of methacrylate and styrene polymers in a living fashion. The polymers show narrow polydispersities (Mn/Mw = 1.10-1.19), and polymerization could be reinitiated after removal of the nanowires from solution. The surface coverage of covalently attached molecules (determined using Uvvis spectroscopy) was found to be 95 ± 0.9 Å/molecule. The polymerization reactions were analyzed using SEM, TEM, size-exclusion chromatography, and elipsometry. Carbon tubes with graphitic domains were isolated from the pyrolysis of polymer-coated wires and were characterized by SEM, TEM, and Raman spectroscopy.