Directing Single-Molecule Emission with DNA Origami-Assembled Optical Antennas.
Nano Lett
; 19(9): 6629-6634, 2019 09 11.
Article
em En
| MEDLINE
| ID: mdl-31449421
ABSTRACT
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
DNA
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Carbocianinas
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Nanopartículas Metálicas
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Corantes Fluorescentes
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Ouro
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Alemanha