Concentration - dependent fluorescence properties of Nile Red in TiO2 based thin films

Anna Synak , Piotr Bojarski , Beata Grobelna , Leszek Kułak , Elżbieta Szczepańska , Michał Mońka


Thin films of Nile Red in TiO2 matrix were prepared with the sol–gel method for different dye concentrations. It was found that at high dye concentration fluorescence and absorption spectra as well as fluorescence intensity decay and time-resolved fluorescence spectra exhibit strong changes. In particular, fluorescence spectra profiles are strongly shifted to the red in a way typical of aggregate formation. Fluorescence intensity decays much faster with increase in concentration in the monomer band due to Nile Red aggregate formation and excitation energy trapping. Time-resolved fluorescence spectra exhibit strong evolution. Clear formation of aggregate band at the red part of time-resolved emission spectra was observed.
Author Anna Synak (FMPI/IEP)
Anna Synak,,
- Institute of Experimental Physics
, Piotr Bojarski (FMPI/IEP)
Piotr Bojarski,,
- Institute of Experimental Physics
, Beata Grobelna (FCh/DACh/LChAC)
Beata Grobelna,,
- Laboratory of chemistry and Analytics of Cosmetics
, Leszek Kułak
Leszek Kułak,,
, Elżbieta Szczepańska (FCh/DACh/LChAC)
Elżbieta Szczepańska,,
- Laboratory of chemistry and Analytics of Cosmetics
, Michał Mońka (FMPI/IEP)
Michał Mońka,,
- Institute of Experimental Physics
Journal seriesJournal of Molecular Liquids, ISSN 0167-7322, e-ISSN 1873-3166, (N/A 100 pkt)
Issue year2020
Publication size in sheets0.50
Article number112899
ASJC Classification1606 Physical and Theoretical Chemistry; 1607 Spectroscopy; 2504 Electronic, Optical and Magnetic Materials; 2505 Materials Chemistry; 3104 Condensed Matter Physics; 3107 Atomic and Molecular Physics, and Optics
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 20-07-2020, ArticleFromJournal
Publication indicators WoS Citations = 0.000; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.275; WoS Impact Factor: 2018 = 4.561 (2) - 2018=4.136 (5)
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