Ultrafast dynamics of förster resonance energy transfer and photo-induced charge transfer in cationic polyfluorene/dye-labeled DNA complex

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

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The ultrafast dynamics of Förster resonance energy transfer (FRET) and photo-induced charge transfer (PCT) has been investigated in an electrostatic complex of a fluorescein-labeled singlestranded DNA (as a FRET acceptor) and a cationic polyfluorene copolymer (as a FRET donor). The donor-acceptor intermolecular distance and total energy transfer efficiency are determined for a polymer/DNA complex with two different counter-ions and compared with those obtained using a theoretical model by considering the competition between FRET and PCT processes. The maximum total energy transfer efficiency (0.47) was estimated at the optimum donor-acceptor intermolecular distance of 39.6 Å.

Original languageEnglish
Pages (from-to)7733-7738
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number10
DOIs
Publication statusPublished - 2012 Oct 1
Externally publishedYes

Fingerprint

Energy Transfer
Energy transfer
Charge transfer
DNA
Coloring Agents
Dyes
deoxyribonucleic acid
dyes
energy transfer
charge transfer
Radiation counters
Fluorescein
Static Electricity
Electrostatics
copolymers
Polymers
counters
Theoretical Models
Copolymers
Ions

Keywords

  • Conjugated Polymers
  • Exciton
  • Förster Resonance Energy Transfer (FRET)
  • Optical In-Situ DNA Detection
  • Photo-Induced Charge Transfer
  • Time-Resolved Fluorescence

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Ultrafast dynamics of förster resonance energy transfer and photo-induced charge transfer in cationic polyfluorene/dye-labeled DNA complex. / Kyhm, Kwangseuk; Kim, Inhong; Kang, Mijeong; Woo, Han Young.

In: Journal of Nanoscience and Nanotechnology, Vol. 12, No. 10, 01.10.2012, p. 7733-7738.

Research output: Contribution to journalArticle

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