TY - JOUR
T1 - DNA-Guided Plasmonic Helix with Switchable Chirality
AU - Lan, Xiang
AU - Liu, Tianji
AU - Wang, Zhiming
AU - Govorov, Alexander O.
AU - Yan, Hao
AU - Liu, Yan
N1 - Funding Information:
This work was supported by grants from the Army Research Office, National Institute of Health, Office of Naval Research, and National Science Foundation to H.Y. and Y.L. We acknowledge Dr. Shuoxing Jiang and Dr. Fei Zhang for helpful discussions. This work was also supported by Volkswagen Foundation (A.O.G.) and via the 1000-talent Award of Sichuan, China (A.O.G.). A.O.G. holds Chang Jiang (Yangtze River) Chair Professorship in China. T.L. is financially supported by the Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/9/19
Y1 - 2018/9/19
N2 - The ability to dynamically tune the self-assembled structures of nanoparticles is of significant interest in the fields of chemistry and material studies. However, it continues to be challenging to dynamically tune the chiral superstructures of nanoparticles and actively switch the chiral optical properties thereof. Here, we dynamically controlled a gold nanorod 3D chiral plasmonic superstructure (a stair helix with a pinwheel end view) templated by a DNA origami supramolecular polymer, using DNA-toehold-mediated conformational change in the DNA template. The gold nanorod chiral plasmonic helix was controllably reconfigured between a tightly folded state (with a small inter-rod angle) and an extended state (with a wide inter-rod angle) of the same handedness, or between two mirror-image-like structures of opposite handedness. As a result, the chiral plasmonic properties of the gold nanorod helix superstructures, in terms of the circular dichroism amplitude, peak response frequency, and signature of chirality, were actively switched upon the DNA-guided structural reconfiguration. We envision that the strategy demonstrated here will boost the advancement of reconfigurable chiral materials with increased complexity for active light control applications through rational molecular design and predictable self-assembly procedures.
AB - The ability to dynamically tune the self-assembled structures of nanoparticles is of significant interest in the fields of chemistry and material studies. However, it continues to be challenging to dynamically tune the chiral superstructures of nanoparticles and actively switch the chiral optical properties thereof. Here, we dynamically controlled a gold nanorod 3D chiral plasmonic superstructure (a stair helix with a pinwheel end view) templated by a DNA origami supramolecular polymer, using DNA-toehold-mediated conformational change in the DNA template. The gold nanorod chiral plasmonic helix was controllably reconfigured between a tightly folded state (with a small inter-rod angle) and an extended state (with a wide inter-rod angle) of the same handedness, or between two mirror-image-like structures of opposite handedness. As a result, the chiral plasmonic properties of the gold nanorod helix superstructures, in terms of the circular dichroism amplitude, peak response frequency, and signature of chirality, were actively switched upon the DNA-guided structural reconfiguration. We envision that the strategy demonstrated here will boost the advancement of reconfigurable chiral materials with increased complexity for active light control applications through rational molecular design and predictable self-assembly procedures.
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U2 - 10.1021/jacs.8b06526
DO - 10.1021/jacs.8b06526
M3 - Article
C2 - 30129752
AN - SCOPUS:85053310262
SN - 0002-7863
VL - 140
SP - 11763
EP - 11770
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 37
ER -