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FRET lasing from self-assembled DNA tetrahedral nanostructures suspended in optofluidic droplet resonators

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Abstract

We demonstrate Förster resonance energy transfer (FRET) lasing from self-assembled tetrahedral DNA complexes labeled with Cy3 and Cy5 dyes and suspended as a gain medium in aqueous microdroplet cavities deposited on a superhydrophobic surface. Threshold fluence and differential efficiency are characterized for DNA complexes containing 1Cy3-3Cy5 and 3Cy3-1Cy5. We demonstrate that at a constant Cy5 concentration, average threshold fluence is reduced 3 to 8 times and average differential efficiency is enhanced 6 to 30 times for 3Cy3-1Cy5 as compared to 1Cy3-3Cy5. Using 3Cy3-1Cy5 nanostructures, FRET lasing is observed at very low concentrations down to ∼ 1 μM. This work shows that optofluidic microlasers based on droplet resonators can be combined with DNA nanotechnology to explore applications in bio/chemical sensing and novel photonic devices.

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Authors and Affiliations

  1. Department of Physics, Koç University, Rumelifeneri Yolu, Sariyer, 34450, Istanbul, Turkey

    M. Aas, E. Özelci & A. Kiraz

  2. Department of Physics, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey

    A. Jonáš

  3. Division of Physical Biology, and Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

    H. Liu & C. Fan

  4. Department of Biomedical Engineering, University of Michigan, 1101 Beal Ave., Ann Arbor, MI, 48109, USA

    Q. Chen & X. Fan

Authors
  1. M. Aas
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  2. E. Özelci
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  3. A. Jonáš
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  4. A. Kiraz
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  5. H. Liu
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  6. C. Fan
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  7. Q. Chen
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  8. X. Fan
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Corresponding author

Correspondence to A. Kiraz.

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Aas, M., Özelci, E., Jonáš, A. et al. FRET lasing from self-assembled DNA tetrahedral nanostructures suspended in optofluidic droplet resonators. Eur. Phys. J. Spec. Top. 223, 2057–2062 (2014). https://doi.org/10.1140/epjst/e2014-02280-1

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  • DOI: https://doi.org/10.1140/epjst/e2014-02280-1

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