Blinking of single dye molecules in a polymer matrix is correlated with free volume in polymers

Kouta Suzuki, Satoshi Habuchi, Martin Vacha*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Blinking of single cyanine (DiI) molecules dispersed in poly(methyl acrylate) and in a series of poly(alkyl methacrylate) matrices is reported. The blinking dynamics is characterized by relaxation times obtained from the decay of autocorrelation function of individual DiI molecules. The mean relaxation times are independent of the polymer composition, molecular weight or the temperature. On the other hand, we observed a systematic increase of the fraction of molecules that show the blinking with increasing temperature difference T - Tg (Tg being the glass transition temperature). The results are discussed in terms of an increase of free volume around DiI molecules with increasing temperature.

Original languageEnglish (US)
Pages (from-to)157-160
Number of pages4
JournalChemical Physics Letters
Volume505
Issue number4-6
DOIs
StatePublished - Mar 30 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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