Polymer‐Coated PtCo Nanoparticles Deposited on Diblock Copolymer Templates: Chemical Selectivity versus Topographical Effects |
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Authors: | Dr E Metwalli I Krisch Dr I Markovits Dr M Rawolle Dr M A Ruderer S Guo Dr S Wyrzgol Prof Dr A Jentys Dr J Perlich Prof Dr J A Lercher Prof Dr P Müller‐Buschbaum |
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Affiliation: | 1. Technische Universit?t München, Physik‐Department, Lehrstuhl für Funktionelle Materialien, James‐Franck‐Str. 1, 85748 Garching (Germany);2. Department of Chemistry and Catalysis Research Center, Technische Universit?t München, Lichtenbergstr. 4, 85747 Garching (Germany);3. Deutsches Elektronen‐Synchrotron (DESY), Notkestra?e 85, 22607 Hamburg (Germany) |
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Abstract: | Metal–polymer hybrid films are prepared by deposition of polymer‐coated PtCo nanoparticles onto block copolymer templates. For templating, a thin film of the lamella‐forming diblock copolymer poly(styrene‐b‐methyl methacrylate) P(S‐b‐MMA) is chemically etched and a topographical surface relief with 3 nm height difference is created. Two types of polymer‐grafted PtCo nanoparticles are compared to explore the impact of chemical selectivity versus the topographical effect of the nanotemplate. A preferable wetting of the polystyrene (PS) domains with poly(styrenesulfonate) (PSS)‐coated PtCo nanoparticles (instead of residing in the space between the domains) is observed. Our investigation reveals that the interaction between PSS‐coated nanoparticles and PS domains dominates over the topographical effects of the polymer surface. In contrast, a non‐selective deposition of poly(N‐vinyl‐2‐pyrrolidone) (PVP)‐coated PtCo nanoparticles and the formation of large metal‐particle aggregates on the film is observed. |
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Keywords: | block copolymers hybrid materials nanocomposites nanoparticles selectivity |
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