Abstract
DNA self-assembly is a powerful tool to arrange optically active components with high accuracy in a large parallel manner. A facile approach to assemble plasmonic antennas consisting of two metallic nanoparticles (40 nm) with a single colloidal quantum dot positioned at the hot spot is presented here. The design approach is based on DNA complementarity, stoichiometry, and steric hindrance principles. Since no intermediate molecules other than short DNA strands are required, the structures possess a very small gap (approximate to 5 nm) which is desired to achieve high Purcell factors and plasmonic enhancement. As a proof-of-concept, the fluorescence emission from antennas assembled with both conventional and ultrasmooth spherical gold particles is measured. An increase in fluorescence is obtained, up to approximate to 30-fold, compared to quantum dots without antenna.
Item Type: | Journal article |
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Faculties: | Physics |
Research Centers: | Center for NanoScience (CENS) |
Subjects: | 500 Science > 530 Physics 500 Science > 500 Science |
ISSN: | 1613-6810 |
Language: | English |
Item ID: | 82482 |
Date Deposited: | 15. Dec 2021, 15:01 |
Last Modified: | 15. Dec 2021, 15:01 |