A rotary plasmonic nanoclock

Ling Xin, Chao Zhou, Xiaoyang Duan and Na Liu ()
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Ling Xin: Max Planck Institute for Intelligent Systems
Chao Zhou: Max Planck Institute for Intelligent Systems
Xiaoyang Duan: Max Planck Institute for Intelligent Systems
Na Liu: Max Planck Institute for Intelligent Systems

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract One of the fundamental challenges in nanophotonics is to gain full control over nanoscale optical elements. The precise spatiotemporal arrangement determines their interactions and collective behavior. To this end, DNA nanotechnology is employed as an unprecedented tool to create nanophotonic devices with excellent spatial addressability and temporal programmability. However, most of the current DNA-assembled nanophotonic devices can only reconfigure among random or very few defined states. Here, we demonstrate a DNA-assembled rotary plasmonic nanoclock. In this system, a rotor gold nanorod can carry out directional and reversible 360° rotation with respect to a stator gold nanorod, transitioning among 16 well-defined configurations powered by DNA fuels. The full-turn rotation process is monitored by optical spectroscopy in real time. We further demonstrate autonomous rotation of the plasmonic nanoclock powered by DNAzyme-RNA interactions. Such assembly approaches pave a viable route towards advanced nanophotonic systems entirely from the bottom-up.

Date: 2019
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DOI: 10.1038/s41467-019-13444-3

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