Metal-enhanced fluorescence and excited state dynamics of carotenoids in thin polymer films

被引：22

作者：

Lee, Jaebeom ^{[1
]}

Song, Junghyun ^{[2
]}

Lee, Daedu ^{[2
]}

Pang, Yoonsoo ^{[2
]}

机构：

[1] Gwangju Inst Sci & Technol, Dept Phys & Photon Sci, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

[2] Gwangju Inst Sci & Technol, Dept Chem, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

基金：

新加坡国家研究基金会;

关键词：

TRANS-BETA-CAROTENE; LIGHT-HARVESTING COMPLEX; CHARGE-TRANSFER STATE; ENERGY-TRANSFER; SINGLET-STATES; S-2; STATE; SOLVENT; RELAXATION; SPECTROSCOPY; DEPENDENCE;

D O I：

10.1038/s41598-019-40446-4

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Metal-enhanced fluorescence of carotenoids, all-trans-beta-carotene and 8'-apo-beta-carotene-8'-al dispersed in thin layers of polystyrene and polyethylene glycol were investigated by time-resolved fluorescence spectroscopy. The weak emission signals of carotenoids in polymer films were increased by 4-40 times in the presence of a silver island film and the emission lifetimes of both carotenoids were measured as significantly shortened. The energy transfer from the intermediate states of carotenoids to the silver islands and the subsequent surface plasmon coupled emission were proposed for the mechanisms of metal-enhanced fluorescence. The fluorescence enhancements of carotenoids in the polymer films were also investigated statistically over a wide area of the silver island films.

引用

页数：12

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