Journal
NANO LETTERS
Volume 13, Issue 8, Pages 3791-3795Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl4017539
Keywords
fluorescence; nanoparticle; plasmon; DNA; switch; machine
Categories
Funding
- NanoSensoMach ERC Advanced Grant under the European Union's 7th Framework Programme [267574]
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DNA tweezers are modified with two 10-nn sized Au NPs and one 5-nm sized Au NP. Upon treatment of the tweezers with fuel and antifuel nucleic acid strands, the switchable closure and opening of the tweezers proceed, leading to the control of programmed nanostructures of the tethered NPs. The tweezers are further modified with a single 10-nm sized nanoparticle, and a fluorophore unit (Cy3), positioned at different distinct sites of the tweezers. The reversible and cyclic fluorescence quenching or fluorescence enhancement phenomena, upon the dynamic opening/closure of the different tweezers, are demonstrated.
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