TY - JOUR
T1 - Time-resolved fluorescence analysis for dye-labeled polystyrene in thin films
AU - Kawaguchi, Daisuke
AU - Tateishi, Yohei
AU - Tanaka, Keiji
N1 - Funding Information:
This research was partly supported by the Scientific Research on Innovative Area “New Polymeric Materials Based on Element-Blocks” (No. 25102535 ) program and by a Grant-in-Aid for Scientific Research (B) (No. 24350061 ) from the Ministry of Education, Culture, Sports, Science and Technology, Japan .
Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Time-resolved fluorescence spectroscopy and anisotropy were applied to dye-labeled polystyrene in thin films. Both fluorescence lifetime and rotational relaxation time decreased with decreasing thickness once the film became thinner than approximately 100 nm. The results could be well reproduced by a tri-layer model composed of surface, interface and bulk regions. The model analysis clearly indicates that the chain dynamics in the surface and substrate interfacial regions is, respectively, faster and slower than that in the internal bulk phase.
AB - Time-resolved fluorescence spectroscopy and anisotropy were applied to dye-labeled polystyrene in thin films. Both fluorescence lifetime and rotational relaxation time decreased with decreasing thickness once the film became thinner than approximately 100 nm. The results could be well reproduced by a tri-layer model composed of surface, interface and bulk regions. The model analysis clearly indicates that the chain dynamics in the surface and substrate interfacial regions is, respectively, faster and slower than that in the internal bulk phase.
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U2 - 10.1016/j.jnoncrysol.2014.09.010
DO - 10.1016/j.jnoncrysol.2014.09.010
M3 - Article
AN - SCOPUS:84922347408
SN - 0022-3093
VL - 407
SP - 284
EP - 287
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
ER -