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J Am Chem Soc. 2012 Jan 11;134(1):146-9. doi: 10.1021/ja209861x. Epub 2011 Dec 13.

Rolling up gold nanoparticle-dressed DNA origami into three-dimensional plasmonic chiral nanostructures.

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National Center for Nanoscience and Technology, Beijing 100190, China.


Construction of three-dimensional (3D) plasmonic architectures using structural DNA nanotechnology is an emerging multidisciplinary area of research. This technology excels in controlling spatial addressability at sub-10 nm resolution, which has thus far been beyond the reach of traditional top-down techniques. In this paper, we demonstrate the realization of 3D plasmonic chiral nanostructures through programmable transformation of gold nanoparticle (AuNP)-dressed DNA origami. AuNPs were assembled along two linear chains on a two-dimensional rectangular DNA origami sheet with well-controlled positions and particle spacing. By rational rolling of the 2D origami template, the AuNPs can be automatically arranged in a helical geometry, suggesting the possibility of achieving engineerable chiral nanomaterials in the visible range.

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