Powering the programmed nanostructure and function of gold nanoparticles with catenated DNA machines

Johann Elbaz, Alessandro Cecconello, Zhiyuan Fan, Alexander O Govorov and Itamar Willner ()
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Johann Elbaz: The Institute of Chemistry, The Hebrew University of Jerusalem
Alessandro Cecconello: The Institute of Chemistry, The Hebrew University of Jerusalem
Zhiyuan Fan: Ohio University
Alexander O Govorov: Ohio University
Itamar Willner: The Institute of Chemistry, The Hebrew University of Jerusalem

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract DNA nanotechnology is a rapidly developing research area in nanoscience. It includes the development of DNA machines, tailoring of DNA nanostructures, application of DNA nanostructures for computing, and more. Different DNA machines were reported in the past and DNA-guided assembly of nanoparticles represents an active research effort in DNA nanotechnology. Several DNA-dictated nanoparticle structures were reported, including a tetrahedron, a triangle or linear nanoengineered nanoparticle structures; however, the programmed, dynamic reversible switching of nanoparticle structures and, particularly, the dictated switchable functions emerging from the nanostructures, are missing elements in DNA nanotechnology. Here we introduce DNA catenane systems (interlocked DNA rings) as molecular DNA machines for the programmed, reversible and switchable arrangement of different-sized gold nanoparticles. We further demonstrate that the machine-powered gold nanoparticle structures reveal unique emerging switchable spectroscopic features, such as plasmonic coupling or surface-enhanced fluorescence.

Date: 2013
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DOI: 10.1038/ncomms3000

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