Nanopatterning and micropatterning of cobalt containing block copolymers via phase‐separation and lithographic techniques |
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| Authors: | Mahboubeh Hadadpour Paul J. Ragogna |
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| Affiliation: | Department of Chemistry and the Centre for Materials and Biomaterials Research (CAMBR), The University of Western Ontario, London, Ontario, Canada |
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| Abstract: | Reversible addition fragmentation transfer (RAFT) agent functionalized polydimethylsiloxane (PDMS‐RAFT) was used as a macro‐RAFT agent to polymerize a mixed sandwich cobaltocene containing monomer featuring η5‐cyclopentadienyl‐cobalt‐η4‐cyclobutadiene. High molecular weight block copolymers (BCP) consisting of a metallic block and a PDMS block with excellent control over molecular weight and polydispersity were prepared. Solid‐state self‐assembly of this BCP resulted in hexagonal domains of metallopolymer phase‐separated from PDMS. In solution, spherical micelles with a metallic core, stabilized by a PDMS corona were prepared. Pyrolysis of the BCP resulted in magnetic nanoparticles with 30% char yield. The BCP was used as an ink material for microcontact printing (μCP) to transfer long‐ranged patterns. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015 , 53, 2747–2754 |
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| Keywords: | lithography magnetic ceramic metallopolymer mixed sandwich cobaltocene self‐assembly |
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