Effect of Solvent on Nanoscale Polymer Heterogeneity and Mobility Probed by Single Molecule Lifetime Fluctuations

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Vallée, R.A.L. and Tomczak, N. and Kuipers, L. and Vancso, G.J. and Hulst, N.F. van (2004) Effect of Solvent on Nanoscale Polymer Heterogeneity and Mobility Probed by Single Molecule Lifetime Fluctuations. Chemical Physics Letters, 384 (1-3). pp. 5-8. ISSN 0009-2614

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Abstract:In this Letter, we address nanoscale heterogeneity in polymer mobility. Single molecule fluorescence lifetime fluctuations are exploited as a probe for local segmental dynamics in polymer films. Wide distributions in polymer mobility are observed, which depend on film fabrication, treatment and amount of solvent contained. Upon solvent evaporation mobile regions disappear, while more immobile regions settle, effectively increasing the glass transition temperature. Besides insight in polymer nanoscale dynamics and heterogeneity, our results bear specific relevance to photodynamic studies on single chromophores, where routinely polymer matrices are used for immobilization. (C) 2003 Elsevier B.V. All rights reserved.
Item Type:Article
Copyright:© 2004 Elsevier
Faculty:
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/46255
Official URL:http://dx.doi.org/10.1016/j.cplett.2003.11.086
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