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Distance dependence of single-molecule energy transfer to graphene measured with DNA origami nanopositioners

  • Kaminska, I. Institute of Physical Chemistry of the Polish Academy of Sciences, Warsaw, Poland
  • Bohlen, J. Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Germany
  • Rocchetti, S. Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Germany
  • Selbach, F. Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Germany
  • Acuna, Guillermo P. Department of Physics, Université de Fribourg, Switzerland
  • Tinnefeld, P. Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Germany
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    10.07.2019
Published in:
  • Nano Letters. - 2019, vol. 19, no. 7, p. 4257–4262
English Despite the thorough investigation of graphene since 2004, altering its surface chemistry and reproducible functionalization remain challenging. This hinders fabrication of more complex hybrid materials with controlled architectures, and as a consequence the development of sensitive and reliable sensors and biological assays. In this contribution, we introduce DNA origami structures as nanopositioners for placing single dye molecules at controlled distances from graphene. The measurements of fluorescence intensity and lifetime of single emitters carried out for distances ranging from 3 to 58 nm confirmed the d–4 dependence of the excitation energy transfer to graphene. Moreover, we determined the characteristic distance for 50% efficiency of the energy transfer from single dyes to graphene to be 17.7 nm. Using pyrene molecules as a glue to immobilize DNA origami nanostructures of various shape on graphene opens new possibilities to develop graphene-based biophysics and biosensing.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/307996
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