Enhanced photoinduced birefringence in polymer-dye complexes: Hydrogen bonding makes a difference
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School of Science |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2007
Major/Subject
Mcode
Degree programme
Language
en
Pages
121103
Series
Applied Physics Letters, Volume 90, Issue 12
Abstract
The authors demonstrate that photoinduced birefringence in azo-dye-doped polymers is strongly enhanced by hydrogen bonding between the guest molecules and the polymer host. The primary mechanism behind the enhancement is the possibility to use high dye doping levels compared to conventional guest-host systems because dye aggregation is restrained by hydrogen bonding. Moreover, hydrogen bonding reduces the mobility of the guest molecules in the polymer host leading to a larger fraction of the induced birefringence to be preserved after the excitation light has been turned off.Description
Keywords
polymers, birefringence, aggregation, anisotropy, hydrogen bonding, photoinduced birefringence, photoinduced anisotropy
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Citation
Priimagi, Arri & Kaivola, Matti & Rodriguez, Francisco J. & Kauranen, Martti. 2007. Enhanced photoinduced birefringence in polymer-dye complexes: Hydrogen bonding makes a difference. Applied Physics Letters. Volume 90, Issue 12. 121103. ISSN 0003-6951 (printed). DOI: 10.1063/1.2714292.