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                                       Details for article 6 of 7 found articles
 
 
  Nanosecond dynamics of phase transitions in chromophoredoped ferroelectric crystals
 
 
Title: Nanosecond dynamics of phase transitions in chromophoredoped ferroelectric crystals
Author: Sedarous, Salah S.
Appeared in: Ferroelectrics letters section
Paging: Volume 23 (1998) nr. 5-6 pages 107-119
Year: 1998-03-01
Contents: The microscopic dynamics of phase transitions in ferroelectric crystals are studied using time-resolved fluorescence spectroscopy. Fluorescence decay times of the molecular probe tryptophan, embedded in the ferroelectric crystals potassium dihydrogen phosphate (KDP) and triglycine sulfate (TGS), are measured over a large temperature range. The dependence of the lifetime data on temperature were different between the two crystals. The magnitude of the fluorescence lifetime shows a rapid change around the phase transition temperature in KDP, while the changes in the lifetime data of the TGS crystal have been smooth. The data indicate that the order of the phase transition in solids (first or second) can be recovered using this technique. Since fluorescence lifetime is related to the dynamic interactions between the chromophore and the environment, insight into the emergence of macroscopic phase transition behavior from microscopic fluctuations near the phase transition region may be realized.
Publisher: Taylor & Francis
Source file: Elektronische Wetenschappelijke Tijdschriften
 
 

                             Details for article 6 of 7 found articles
 
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