Directing single-molecule emission with dna origami-assembled optical antennas

Hübner, Kristina; Pilo-Pais, Mauricio; Selbach, Florian; Liedl, Tim; Tinnefeld, Philip; Stefani, Fernando D.; Acuna, Guillermo P.

doi:10.1021/acs.nanolett.9b02886

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Directing single-molecule emission with dna origami-assembled optical antennas

Hübner, Kristina Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 Haus E, 81377 München, Germany
Pilo-Pais, Mauricio Faculty of Physics and Center for NanoScience, Ludwig-Maximilians-Universität München, Geschwister-Scholl-Platz 1, 80539 München, Germany - Department of Physics, University of Fribourg, Chemin du Musée 3, Fribourg CH-1700, Switzerland
Selbach, Florian Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 Haus E, 81377 München, Germany
Liedl, Tim Faculty of Physics and Center for NanoScience, Ludwig-Maximilians-Universität München, Geschwister-Scholl-Platz 1, 80539 München, Germany
Tinnefeld, Philip Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 Haus E, 81377 München, Germany
Stefani, Fernando D. Centro de Investigaciones en Bionanociencias (CIBION), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2390, C1425FQD, Ciudad Autónoma de Buenos Aires, Argentina - Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Güiraldes 2620, C1428EHA, Ciudad Autónoma de Buenos Aires, Argentina
Acuna, Guillermo P. Department of Physics, University of Fribourg, Chemin du Musée 3, Fribourg CH-1700, Switzerland

11.09.2019

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Nano Letters. - 2019, vol. 19, no. 9, p. 6629–6634

English We demonstrate the capability of DNA self-assembled optical antennas to direct the emission of an individual fluorophore, which is free to rotate. DNA origami is used to fabricate optical antennas composed of two colloidal gold nanoparticles separated by a predefined gap and to place a single Cy5 fluorophore near the gap center. Although the fluorophore is able to rotate, its excitation and far-field emission is mediated by the antenna, with the emission directionality following a dipolar pattern according to the antenna main resonant mode. This work is intended to set out the basis for manipulating the emission pattern of single molecules with self-assembled optical antennas based on colloidal nanoparticles.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language