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Article

Segregation of Maghemite Nanoparticles within Symmetric Diblock Copolymer and Triblock Terpolymer Patterns under Solvent Vapor Annealing

Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece
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Authors to whom correspondence should be addressed.
Current address: Polymer Synthesis Laboratory, Division of Physical Sciences & Engineering, King Abdullah University of Science and Technology, KAUST Catalysis Center, Thuwal 23955, Saudi Arabia.
Materials 2020, 13(6), 1286; https://doi.org/10.3390/ma13061286
Received: 31 January 2020 / Revised: 26 February 2020 / Accepted: 5 March 2020 / Published: 12 March 2020
(This article belongs to the Special Issue Synthesis, Characterization and Applications of Block Copolymers)
Block copolymers (BCPs), through their self-assembly, provide an excellent guiding platform for precise controlled localization of maghemite nanoparticles (MNPs). Diblock copolymers (di/BCP) represent the most applied matrix to host filler components due to their morphological simplicity. A series of nanocomposites based on diblock copolymer or triblock terpolymer matrices and magnetic nanoparticles were prepared to study and compare the influence of an additional block into the BCP matrix. MNPs were grafted with low molecular weight polystyrene (PS) chains in order to be segregated in a specific phase of the matrix to induce selective localization. After the mixing of the BCPs with 10% w/v PS-g-MNPs, nanocomposite thin films were formed by spin coating. Solvent vapor annealing (SVA) enabled the PS-g-MNPs selective placement within the PS domains of the BCPs, as revealed by atomic force microscopy (AFM). The recorded images have proven that high amounts of functionalized MNPs can be controllably localized within the same block (PS), despite the architecture of the BCPs (AB vs. ABC). The adopted lamellar structure of the “neat” BCP thin films was maintained for MNPs loading approximately up to 10% w/v, while, for higher content, the BCP adopted lamellar morphology is partially disrupted, or even disappears for both AB and ABC architectures. View Full-Text
Keywords: hybrid materials; block copolymer scaffold; block copolymer; maghemite nanoparticles; solvent vapor annealing; diblock copolymers; triblock terpolymers hybrid materials; block copolymer scaffold; block copolymer; maghemite nanoparticles; solvent vapor annealing; diblock copolymers; triblock terpolymers
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MDPI and ACS Style

Zapsas, G.; Moschovas, D.; Ntetsikas, K.; Karydis-Messinis, A.; Chalmpes, N.; Kouloumpis, A.; Gournis, D.; Zafeiropoulos, N.E.; Avgeropoulos, A. Segregation of Maghemite Nanoparticles within Symmetric Diblock Copolymer and Triblock Terpolymer Patterns under Solvent Vapor Annealing. Materials 2020, 13, 1286. https://doi.org/10.3390/ma13061286

AMA Style

Zapsas G, Moschovas D, Ntetsikas K, Karydis-Messinis A, Chalmpes N, Kouloumpis A, Gournis D, Zafeiropoulos NE, Avgeropoulos A. Segregation of Maghemite Nanoparticles within Symmetric Diblock Copolymer and Triblock Terpolymer Patterns under Solvent Vapor Annealing. Materials. 2020; 13(6):1286. https://doi.org/10.3390/ma13061286

Chicago/Turabian Style

Zapsas, George, Dimitrios Moschovas, Konstantinos Ntetsikas, Andreas Karydis-Messinis, Nikolaos Chalmpes, Antonios Kouloumpis, Dimitrios Gournis, Nikolaos E. Zafeiropoulos, and Apostolos Avgeropoulos. 2020. "Segregation of Maghemite Nanoparticles within Symmetric Diblock Copolymer and Triblock Terpolymer Patterns under Solvent Vapor Annealing" Materials 13, no. 6: 1286. https://doi.org/10.3390/ma13061286

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