Journal article
Unraveling electronic energy transfer in single conjugated polyelectrolytes encapsulated in lipid vesicles
P Karam, AT Ngo, I Rouiller, G Cosa
Proceedings of the National Academy of Sciences of the United States of America | NATL ACAD SCIENCES | Published : 2010
Abstract
A method for the study of conjugated polyelectrolyte (CPE) photophysics in solution at the single-molecule level is described. Extended observation times of single polymer molecules are enabled by the encapsulation of the CPEs within 200-nm lipid vesicles, which are in turn immobilized on a surface. When combined with a molecular-level visualization of vesicles and CPE via cryo-transmission electron microscopy, these single-molecule spectroscopy studies on CPEs enable us to directly correlate the polymer conformation with its spectroscopic features. These studies are conducted with poly[5-methoxy-2-(3-sulfopropoxy)-1, 4-phenylene-vinylene] (MPS-PPV, a negatively charged CPE), when encapsulat..
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Funding Acknowledgements
G. C. and I. R. are grateful to Natural Sciences and Engineering Research Council and Canadian Foundation for Innovation New Opportunities Fund for financial assistance. P. K. and A.T.N. are also thankful to the McGill Chemical Biology Fellowship Program (Canadian Institutes of Health Research) for postgraduate scholarships.