Slow dynamics of single molecules in a room temperature polymer matrix
- Pacific Northwest National Lab., Richland, WA (United States)
Trajectories of single-molecule emission intensity and dipole orientation were measured with a time resolution up to 10 ms for dye molecules in poly(methylmethacrylate) matrix at room temperature. The intensity autocorrelation functions showed a dynamic process occurring on a rather slow time scale, several hundred milliseconds. Although we observed a small propensity for dipole reorientation, it is too infrequent to account for these intensity fluctuations. The intensity fluctuations on this time scale were proven to be spontaneous (independent of the excitation intensity), and were due to the spectral fluctuations that we observed previously. The higher time resolution in the intensity trajectories allowed us to observe multi-exponential decays in the intensity autocorrelation functions, which indicated complex intermolecular interactions and dynamics within the polymer matrix.
- OSTI ID:
- 560343
- Report Number(s):
- CONF-970443-; TRN: 97:005895-0268
- Resource Relation:
- Conference: 213. national meeting of the American Chemical Society, San Francisco, CA (United States), 13-17 Apr 1997; Other Information: PBD: 1997; Related Information: Is Part Of 213th ACS national meeting; PB: 2904 p.
- Country of Publication:
- United States
- Language:
- English
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