Micrometer-domain fluorescence dynamics of xanthene dyes in polymer films

K. Kemnitz*, N. Shimo, Hiroshi Masuhara, A. Fukugawa, Y. Horiike

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We present fluorescence decays of xanthene dyes in polymer films from spatial domains as small as 0.5 μm, observed from submicron gold/quartz heterostructures, spin coated by dye/polymer solutions. The fluorescence decays observed from gold and quartz domains were nonexponential and had components with lifetimes between 0.2-3.9 ns for 3×10-3 M rhodamine 3B/PMMA. In case of 1 μm thick polymer films, the gold domains typically decayed faster than the inter-electrode quartz domains. Comparative studies of spincoated films and bulk systems showed that the fluorescence dynamics depend strongly on the method of sample preparation. Dye/polymer systems, produced by polymerization of dye/precursor solutions, revealed a strong annealing effect of the host matrix by in situ monitoring the temperature-dependent fluorescence dynamics of the guest.

Original languageEnglish
Pages (from-to)278-282
Number of pages5
JournalJournal of Luminescence
Volume48-49
Issue numberPART 1
DOIs
StatePublished - 1 Jan 1991

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