Solvent-modified ultrafast decay dynamics in conjugated polymer/dye labeled single stranded DNA

Inhong Kim, Mijeong Kang, Han Young Woo, Jin Woo Oh, Kwangseuk Kyhm

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 Å) and resonance energy transfer efficiency (EFRET = 58.7 %) of pure buffer solution become R0 = 38.6 Å and EFRET = 48.0 % when 80% DMSO/buffer mixture is added.

Original languageEnglish
Title of host publicationInternational Conference on Nano-Bio Sensing, Imaging, and Spectroscopy 2015, NBSIS 2015
EditorsDonghyun Kim, Min-Gon Kim, Seung-Han Park
PublisherSPIE
ISBN (Electronic)9781628416794
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes
Event2nd International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy, NBSIS 2015 - Jeju, Korea, Republic of
Duration: 2015 Feb 252015 Feb 27

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume9523
ISSN (Print)1605-7422

Conference

Conference2nd International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy, NBSIS 2015
CountryKorea, Republic of
CityJeju
Period15/2/2515/2/27

Keywords

  • Conjugated polymer
  • Exciton
  • Fluorescence quenching
  • Forster resonance energy transfer (FRET)
  • Time-resolved fluorescence

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of 'Solvent-modified ultrafast decay dynamics in conjugated polymer/dye labeled single stranded DNA'. Together they form a unique fingerprint.

  • Cite this

    Kim, I., Kang, M., Woo, H. Y., Oh, J. W., & Kyhm, K. (2015). Solvent-modified ultrafast decay dynamics in conjugated polymer/dye labeled single stranded DNA. In D. Kim, M-G. Kim, & S-H. Park (Eds.), International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy 2015, NBSIS 2015 [95230N] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 9523). SPIE. https://doi.org/10.1117/12.2190332