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Patterning of Gold Nanoparticles on Fluoropolymer Films by Using Patterned Surface Grafting and Layer-by-Layer Deposition Techniques

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Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup-si, Jeollabuk-do 580-185, Republic of Korea
Department of Chemistry and Institute of Biological Interfaces, Sogang University, Mapo-gu, Seoul 121-742, Republic of Korea
§ Department of Polymer Science and Engineering, Chungnam National University, Yuseong-gu, Daejeon 305-764, Republic of Korea
*+82-42-821-6664. Fax: +82-42-821-8910. E-mail: [email protected] (J.-H.C.); [email protected] (C.-H.J.).
Cite this: ACS Appl. Mater. Interfaces 2013, 5, 17, 8546–8552
Publication Date (Web):August 8, 2013
https://doi.org/10.1021/am4019687
Copyright © 2013 American Chemical Society

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    Abstract

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    The patterning of gold nanoparticles (GNPs) on the surface of a fluoropolymer substrate by using patterned surface grafting and layer-by-layer deposition techniques is described. The surface of a poly(tetrafluoroethylene-co-perfluorovinyl ether) (PFA) substrate was selectively implanted with 150 keV proton ions. Peroxide groups were successfully formed on the implanted PFA surface, and their concentration depended on the fluence. Acrylic acid was graft polymerized onto the implanted regions of the PFA substrate, resulting in well-defined patterns of poly(acrylic acid) (PAA) on the PFA substrate. The surface properties of the PAA-patterned PFA surface, such as chemical compositions, wettability, and morphology, were investigated. The surface analysis results revealed that PAA was definitely present on the implanted regions of the PFA surface, and the degree of grafting was dependent on three factors: fluence, grafting time, and monomer concentration. Furthermore, GNP patterns were generated on the prepared PAA-patterned PFA surface by layer-by-layer deposition of GNPs and poly(diallyldimethyl ammonium chloride). The multilayers of GNPs were deposited only onto the PAA-grafted regions separated by bare PFA regions, and the resulting GNP patterns exhibited good electrical conductivity.

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    Dynamic light scattering (DLS) profile of prepared GNPs; effect of acrylic acid concentration and grafting reaction time on the grafting degree; photographs of the PAA-grafted PFA films prepared at different monomer concentrations; Cls XPS spectra of the control, implanted, and PAA-grafted PFA substrates at different fluences; water contact angles of the control, implanted, and PAA-grafted PFA films at different fluences; FE-SEM images for the PAA-patterned PFA substrate after the sequential layer-by-layer deposition of PDDA and GNPs; graphic illustration for the resistivity calculation of (GNPs/PDDA)n-deposited PAA patterns on the PFA substrate; and resistivity and conductivity of (GNPs/PDDA)n-deposited PAA patterns on the PFA substrate with different layers (n). This material is available free of charge via the Internet at http://pubs.acs.org.

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