Jump to main content
Jump to site search


Distance dependent photoacoustics revealed through DNA nanostructures

Author affiliations

Abstract

Molecular rulers that rely on the Förster resonance energy transfer (FRET) mechanism are widely used to investigate dynamic molecular processes that occur on the nanometer scale. However, the capabilities of these fluorescence molecular rulers are fundamentally limited to shallow imaging depths by light scattering in biological samples. Photoacoustic tomography (PAT) has recently emerged as a high resolution modality for in vivo imaging, coupling optical excitation with ultrasound detection. In this paper, we report the capability of PAT to probe distance-dependent FRET at centimeter depths. Using DNA nanotechnology we created several nanostructures with precisely positioned fluorophore–quencher pairs over a range of nanoscale separation distances. PAT of the DNA nanostructures showed distance-dependent photoacoustic signal enhancement and demonstrated the ability of PAT to reveal the FRET process deep within tissue mimicking phantoms. Further, we experimentally validated these DNA nanostructures as a novel and biocompatible strategy to augment the intrinsic photoacoustic signal generation capabilities of small molecule fluorescent dyes.

Graphical abstract: Distance dependent photoacoustics revealed through DNA nanostructures

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Jul 2017, accepted on 09 Oct 2017 and first published on 10 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR05353C
Citation: Nanoscale, 2017, Advance Article
  •   Request permissions

    Distance dependent photoacoustics revealed through DNA nanostructures

    J. Joseph, K. N. Baumann, P. Koehler, T. J. Zuehlsdorff, D. J. Cole, J. Weber, S. E. Bohndiek and S. Hernández-Ainsa, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR05353C

Search articles by author

Spotlight

Advertisements