dc.contributor.author
Kolberg, Adrianna
dc.contributor.author
Wenzel, Christiane
dc.contributor.author
Hackenstrass, Klara
dc.contributor.author
Schwarzl, Richard
dc.contributor.author
Rüttiger, Christian
dc.contributor.author
Hugel, Thorsten
dc.contributor.author
Gallei, Markus
dc.contributor.author
Netz, Roland R.
dc.contributor.author
Balzer, Bizan N.
dc.date.accessioned
2020-06-29T10:37:58Z
dc.date.available
2020-06-29T10:37:58Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/27358
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-27114
dc.description.abstract
The response of switchable polymer blends and coatings to temperature variation is important for the development of high-performance materials. Although this has been well studied for bulk materials, a proper understanding at the molecular level, in particular for high stretching forces, is still lacking. Here we investigate the molecular details of the temperature-dependent elastic response of two widely used water-soluble polymers, namely, polyethylene glycol (PEG) and poly(N-isopropylacrylamide) (PNiPAM) with a combined approach using atomic force microscopy (AFM) based single molecule force spectroscopy (SMFS) experiments and molecular dynamics (MD) simulations. SMFS became possible by the covalent attachment of long and defined single polymers featuring a functional end group. Most interestingly, varying the temperature produces contrasting effects for PEG and PNiPAM. Surprising as these results might occur at first sight, they can be understood with the help of MD simulations in explicit water. We find that hydration is widely underestimated for the mechanics of macromolecules and that a polymer chain has competing energetic and entropic elastic components. We propose to use the temperature dependence to quantify the energetic behavior for high stretching forces. This fundamental understanding of temperature-dependent single polymer stretching response might lead to innovations like fast switchable polymer blends and coatings with polymer chains that act antagonistically.
en
dc.format.extent
28 Seiten
dc.rights.uri
http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen
dc.subject
thermoresponsive polymers
en
dc.subject
temperature dependence
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Opposing temperature dependence of the stretching response of single PEG and PNiPAM polymers
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1021/jacs.9b04383
dcterms.bibliographicCitation.journaltitle
Journal of the American Chemical Society
dcterms.bibliographicCitation.number
29
dcterms.bibliographicCitation.pagestart
11603
dcterms.bibliographicCitation.pageend
11613
dcterms.bibliographicCitation.volume
141
dcterms.bibliographicCitation.url
https://doi.org/10.1021/jacs.9b04383
refubium.affiliation
Physik
refubium.note.author
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of the American Chemical Society, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jacs.9b04383.
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
0002-7863
dcterms.isPartOf.eissn
1520-5126