dc.date.accessioned | 2020-12-17T20:40:39Z | |
dc.date.available | 2020-12-17T20:40:39Z | |
dc.date.created | 2020-12-05T17:16:34Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | König, Nico Willner, Lutz Carlström, Göran Zinn, Thomas Knudsen, Kenneth Dahl Rise, Frode Topgaard, Daniel Lund, Reidar . Spherical Micelles with Nonspherical Cores: Effect of Chain Packing on the Micellar Shape. Macromolecules. 2020, 53(23), 10686-10698 | |
dc.identifier.uri | http://hdl.handle.net/10852/81698 | |
dc.description.abstract | Self-assembly of amphiphilic polymers into micelles is an archetypical example of a “self-confined” system due to the formation of micellar cores with dimensions of a few nanometers. In this work, we investigate the chain packing and resulting shape of Cn-PEOx micelles with semicrystalline cores using small/wide-angle X-ray scattering (SAXS/WAXS), contrast-variation small-angle neutron scattering (SANS), and nuclear magnetic resonance spectroscopy (NMR). Interestingly, the n-alkyl chains adopt a rotator-like conformation and pack into prolate ellipses (axial ratio ϵ ≈ 0.5) in the “crystalline” region and abruptly arrange into a more spheroidal shape (ϵ ≈ 0.7) above the melting point. We attribute the distorted spherical shape above the melting point to thermal fluctuations and intrinsic rigidity of the n-alkyl blocks. We also find evidence for a thin dehydrated PEO layer (≤1 nm) close to the micellar core. The results provide substantial insight into the interplay between crystallinity and molecular packing in confinement and the resulting overall micellar shape. | |
dc.language | EN | |
dc.publisher | ACS Publications | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Spherical Micelles with Nonspherical Cores: Effect of Chain Packing on the Micellar Shape | |
dc.type | Journal article | |
dc.creator.author | König, Nico | |
dc.creator.author | Willner, Lutz | |
dc.creator.author | Carlström, Göran | |
dc.creator.author | Zinn, Thomas | |
dc.creator.author | Knudsen, Kenneth Dahl | |
dc.creator.author | Rise, Frode | |
dc.creator.author | Topgaard, Daniel | |
dc.creator.author | Lund, Reidar | |
cristin.unitcode | 185,15,17,0 | |
cristin.unitname | Senter for materialvitenskap og nanoteknologi | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 1856527 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Macromolecules&rft.volume=53&rft.spage=10686&rft.date=2020 | |
dc.identifier.jtitle | Macromolecules | |
dc.identifier.volume | 53 | |
dc.identifier.issue | 23 | |
dc.identifier.startpage | 10686 | |
dc.identifier.endpage | 10698 | |
dc.identifier.doi | https://doi.org/10.1021/acs.macromol.0c01936 | |
dc.identifier.urn | URN:NBN:no-84736 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0024-9297 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/81698/2/Konig_et_al_Macromolecules_2020_53_23.pdf | |
dc.type.version | PublishedVersion | |
dc.relation.project | NFR/226244 | |
dc.relation.project | EC/H2020/731019 | |