Wang, T, Pearson, A.J, Dunbar, A.D et al. (7 more authors) (2012) Competition between substrate-mediated π-π stacking and surface-mediated T(g) depression in ultrathin conjugated polymer films. European Physics Journal E Soft Matter and Biological Physics, 35 (12). 9807 . - .
Abstract
We report surface and interface effects in dynamics and chain conformation in the thin film of conjugated polymer PCDTBT. To probe dynamic anomalies, we measure the glass transition temperature (T(g)) of PCDTBT films as a function of thickness, and find that there is a significant depression in T(g) for films less than 100 nm thick; a result qualitatively similar to that observed in many other polymer film systems. However, for films less than 40 nm, the T(g) converges to a constant value of 20 K below its bulk value. Grazing incidence X-ray diffraction shows depth-dependent molecular organization that is associated with the unusual thickness-dependent dynamics.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2012 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Soft matter, polymers and polyelectrolytes |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number EPSRC EP/F0164331 EPSRC EP/I028641/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 28 Apr 2014 12:57 |
Last Modified: | 28 Apr 2014 12:57 |
Published Version: | http://dx.doi.org/10.1140/epje/i2012-12129-3 |
Status: | Published |
Publisher: | Springer Link |
Refereed: | Yes |
Identification Number: | 10.1140/epje/i2012-12129-3 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:78731 |