Research Genetics
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Single-molecule dynamics in polymers. Orientational trajectories of three dye molecules embedded in poly(methyl methacrylate) are probed with wide-field single-molecule optical microscopy (6). The different orientational dynamics of the different molecules illustrate the heterogeneity observed within polymer hosts even 80°C below the glass transition temperature. The cartoon shows how differences in local free volume might give rise to these differences in rotational mobility.


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Volume 292, Number 5522, Issue of 1 Jun 2001, p. 1671.
Copyright © 2001 by The American Association for the Advancement of Science.