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. Author manuscript; available in PMC: 2019 Jun 3.
Published in final edited form as: Chem Rev. 2018 Jan 31;118(6):3032–3053. doi: 10.1021/acs.chemrev.7b00225

Figure 5.

Figure 5

DNA-assembled plasmonic chiral nanostructures. a. Schematic and TEM images of the DNA-AuNP pyramids in different handedness. 57 Images reproduced from ref 57. Copyright 2009 American Chemical Society. b. LH and RH nanohelices are formed by nine AuNPs that are attached to the surface of DNA origami bundles. AuNPs carry multiple thiol-modified DNA strands, which are complementary to the staple extensions on origami. Experimental CD spectra of the LH and RH helices of nine AuNPs, showing characteristic bisignate signatures in the visible. 20 Images reproduced with permission from ref 20. Copyright 2012 Macmillan Publishing Ltd. c. Fifteen AuNPs are assembled on a rectangular origami sheet. Addition of the folding strands leads to rolling and subsequent stapling of the 2D sheet into a hollow tube. As a consequence the AuNPs are arranged into a 3D helix. 19 Images reproduced from ref 19. Copyright 2011 American Chemical Society. d. Chiral plasmonic tetramers assembled on DNA origami sheets in different handedness. 104 Images reproduced from ref 104. Copyright 2013 American Chemical Society. e. Twenty four AuNPs are assembled in a helical fashion along an origami ring to form a LH or RH plasmonic toroidal structure. 103 Images reproduced from ref 103. Copyright 2016 American Chemical Society. f. Schematic of the bifacial DNA origami-directed assembly of 3D AuNR dimers. 105 Images reproduced from ref 105. Copyright 2013 American Chemical Society. g. Schematic of the self-assembly of RH-AuNR helices. This design enables one-pot assembly of AuNR helical superstructures. 131 Images reproduced from ref 131. Copyright 2014 American Chemical Society.