期刊
ACS Nano
卷 10, 期 7, 页码 7058-7063出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b03188
关键词
BODIPY; microsphere; energy transfer; whispering gallery mode; photoluminescence
类别
资金
- KAKENHI from JSPS/MEXT, Japan [25708020, 15H00860, 15H00986, 15K13812, 16H02081]
- Asahi Glass Foundation
- University of Tsukuba-DAAD partnership program
- Grants-in-Aid for Scientific Research [16H02081, 15H00723, 15H00914, 15H00860, 15H00986, 16J00934, 15KK0182] Funding Source: KAKEN
Color-tunable resonant photoluminescence (PL) was attained from polystyrene microspheres doped with a single polymorphic fluorescent dye, boron-dipyrrin (BODIPY) 1. The color of the resonant PL depends on the assembling morphology of 1 in the microspheres, which can be selectively controlled from green to red by the initial concentration of 1 in the preparation process of the microspheres. Studies on intersphere PL propagation with multicoupled microspheres, prepared by micromanipulation technique, revealed that multistep photon transfer takes place through the microspheres, accompanying energy transfer cascade with stepwise PL color change. The intersphere energy transfer cascade is direction selective, where energy donor-to-acceptor down conversion direction is only allowed. Such cavity-mediated long-distance and multistep energy transfer will be advantageous for polymer photonics device application.
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