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  Grazing incidence neutron spin echo study of poly(N-isopropylacrylamide) brushes

Witte, J., Krause, P., Kyrey, T., Dahl, A. M., Lutzki, J., Schmidt, B. V. K. J., et al. (2020). Grazing incidence neutron spin echo study of poly(N-isopropylacrylamide) brushes. Macromolecules, 53(5), 1819-1830. doi:10.1021/acs.macromol.9b01247.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-BFE4-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-F79D-4
Genre: Journal Article

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 Creators:
Witte, Judith, Author
Krause, Patrick, Author
Kyrey, Tetyana, Author
Dahl, Anna Margarethe, Author
Lutzki, Jana, Author
Schmidt, Bernhard V. K. J.1, Author              
Ganeva, Marina, Author
Koutsioubas, Alexandros, Author
Holderer, Olaf, Author
Wellert, Stefan, Author
Affiliations:
1Bernhard Schmidt, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2149676              

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 Abstract: The structure and dynamic properties of poly(N-isopropylacrylamide) brushes at solid planar surfaces under good solvent conditions are studied. Polymer brushes with grafting densities in the concentrated and semidilute regime are prepared via surface-initiated atom transfer radical polymerization. The polymer brushes were removed from the substrates to determine the molar mass and molecular dispersity via size-exclusion chromatography to draw conclusions about the grafting density. The structure of the brushes was investigated with ellipsometry and neutron reflectometry measurements. We found an influence of the grafting density on the swelling properties of the poly(N-isopropylacrylamide) brushes. Furthermore, the brush dynamics at different neutron penetration depths was analyzed with neutron spin echo spectroscopy under grazing incidence. The evanescent intensity distribution was modeled with the BornAgain software package, which uses the distorted-wave Born approximation.

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Language(s): eng - English
 Dates: 2020-02-192020
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1021/acs.macromol.9b01247
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Title: Macromolecules
  Other : Macromolecules
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 53 (5) Sequence Number: - Start / End Page: 1819 - 1830 Identifier: ISSN: 0024-9297