@inproceedings{94095cd81b924997b0a978d2452c8963,
title = "Solvent-modified ultrafast decay dynamics in conjugated polymer/dye labeled single stranded DNA",
abstract = "We have investigated that organic solvent (DMSO, dimethyl sulfoxide) modifies energy transfer efficiency between conjugated polymers (donors) and fluorescein-labeled single stranded DNAs (acceptors). In a mixture of buffer and organic solvent, fluorescence of the acceptors is significantly enhanced compared to that of pure water solution. This result can be attributed to change of the donor-Acceptor environment such as decreased hydrophobicity of polymers, screening effect of organic solvent molecules, resulting in an enhanced energy transfer efficiency. Time-resolved fluorescence decay of the donors and the acceptors was modelled by considering the competition between the energy harvesting Foerster resonance energy transfer and the energy-wasting quenching. This enables to quantity that the Foerster distance (R0 = 43.3 {\AA}) and resonance energy transfer efficiency (EFRET = 58.7 %) of pure buffer solution become R0 = 38.6 {\AA} and EFRET = 48.0 % when 80% DMSO/buffer mixture is added.",
keywords = "Conjugated polymer, Exciton, Fluorescence quenching, Forster resonance energy transfer (FRET), Time-resolved fluorescence",
author = "Inhong Kim and Mijeong Kang and Woo, {Han Young} and Oh, {Jin Woo} and Kwangseuk Kyhm",
year = "2015",
month = jan,
day = "1",
doi = "10.1117/12.2190332",
language = "English",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
publisher = "SPIE",
editor = "Donghyun Kim and Min-Gon Kim and Seung-Han Park",
booktitle = "International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy 2015, NBSIS 2015",
note = "2nd International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy, NBSIS 2015 ; Conference date: 25-02-2015 Through 27-02-2015",
}