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3D‐Positioning of Nanoparticles in High‐Curvature Block Copolymer Domains
The defined assembly of nanoparticles in polymer matrices is an important precondition for next‐generation functional materials. Here we demonstrate that a defined three‐dimensional nanoparticle assembly within the unit cells can be realized by directly linking the nanoparticles to block copolymers....
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8362214/ https://www.ncbi.nlm.nih.gov/pubmed/34156739 http://dx.doi.org/10.1002/anie.202102908 |
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author | Leffler, Vanessa B. Ehlert, Sascha Förster, Beate Dulle, Martin Förster, Stephan |
author_facet | Leffler, Vanessa B. Ehlert, Sascha Förster, Beate Dulle, Martin Förster, Stephan |
author_sort | Leffler, Vanessa B. |
collection | PubMed |
description | The defined assembly of nanoparticles in polymer matrices is an important precondition for next‐generation functional materials. Here we demonstrate that a defined three‐dimensional nanoparticle assembly within the unit cells can be realized by directly linking the nanoparticles to block copolymers. We show that for a range of nearly symmetric to unsymmetric block copolymers there are only two formed structures, a hexagonal lattice of P6/mmm‐symmetry, where the nanoparticles are located in 1D‐arrays within the cylindrical domains, and a cubic lattice of Im3m‐symmetry, where the nanoparticles are located in the octahedral voids of a BCC‐lattice, corresponding to the structure of ferrite steel. We observe the block length ratio and thus the interfacial curvature to be the most important parameter determining the lattice type. This is rationalized in terms of minimal chain extension such that domain topologies with large positive curvature are highly preferred. Already volume fractions of only one percent are sufficient to destabilize a lamellar structure and favor the formation of highly curved interfaces. The study thus demonstrates how nanoparticles can be located on well‐defined positions in three‐dimensional unit cells of block copolymer nanocomposites. This opens the way to functional 3D‐nanocomposites where the nanoparticles need to be located on defined matrix positions. |
format | Online Article Text |
id | pubmed-8362214 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-83622142021-08-17 3D‐Positioning of Nanoparticles in High‐Curvature Block Copolymer Domains Leffler, Vanessa B. Ehlert, Sascha Förster, Beate Dulle, Martin Förster, Stephan Angew Chem Int Ed Engl Research Articles The defined assembly of nanoparticles in polymer matrices is an important precondition for next‐generation functional materials. Here we demonstrate that a defined three‐dimensional nanoparticle assembly within the unit cells can be realized by directly linking the nanoparticles to block copolymers. We show that for a range of nearly symmetric to unsymmetric block copolymers there are only two formed structures, a hexagonal lattice of P6/mmm‐symmetry, where the nanoparticles are located in 1D‐arrays within the cylindrical domains, and a cubic lattice of Im3m‐symmetry, where the nanoparticles are located in the octahedral voids of a BCC‐lattice, corresponding to the structure of ferrite steel. We observe the block length ratio and thus the interfacial curvature to be the most important parameter determining the lattice type. This is rationalized in terms of minimal chain extension such that domain topologies with large positive curvature are highly preferred. Already volume fractions of only one percent are sufficient to destabilize a lamellar structure and favor the formation of highly curved interfaces. The study thus demonstrates how nanoparticles can be located on well‐defined positions in three‐dimensional unit cells of block copolymer nanocomposites. This opens the way to functional 3D‐nanocomposites where the nanoparticles need to be located on defined matrix positions. John Wiley and Sons Inc. 2021-06-22 2021-08-02 /pmc/articles/PMC8362214/ /pubmed/34156739 http://dx.doi.org/10.1002/anie.202102908 Text en © 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Research Articles Leffler, Vanessa B. Ehlert, Sascha Förster, Beate Dulle, Martin Förster, Stephan 3D‐Positioning of Nanoparticles in High‐Curvature Block Copolymer Domains |
title | 3D‐Positioning of Nanoparticles in High‐Curvature Block Copolymer Domains |
title_full | 3D‐Positioning of Nanoparticles in High‐Curvature Block Copolymer Domains |
title_fullStr | 3D‐Positioning of Nanoparticles in High‐Curvature Block Copolymer Domains |
title_full_unstemmed | 3D‐Positioning of Nanoparticles in High‐Curvature Block Copolymer Domains |
title_short | 3D‐Positioning of Nanoparticles in High‐Curvature Block Copolymer Domains |
title_sort | 3d‐positioning of nanoparticles in high‐curvature block copolymer domains |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8362214/ https://www.ncbi.nlm.nih.gov/pubmed/34156739 http://dx.doi.org/10.1002/anie.202102908 |
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