Issue 20, 2015
From the journal:

Nanoscale

Tunable optical activity of plasmonic dimers assembled by DNA origami†

Chengcheng Rao,a   Zhen-Gang Wang,b   Na Li,b   Wei Zhang,*c   Xuecheng Xu*a  and  Baoquan Ding*b  

* Corresponding authors

a Department of Physics, East China Normal University, No. 500 Dong Chuan Road, 200241 Shanghai, China
E-mail: xcxu@phy.ecnu.edu.cn

b CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, No. 11 BeiYiTiao, ZhongGuanCun, Beijing 100190, China
E-mail: dingbq@nanoctr.cn

c Institute of Applied Physics and Computational Mathematics, Beijing 100088, P. R. China
E-mail: zhang_wei@iapcm.ac

Abstract

We investigate the optical response of gold nanorod (AuNR) dimers assembled in parallel on a DNA origami template. Plasmonic circular dichroism (CD) was found to be highly dependent on the orientation of the dimers relative to the DNA axis and the inter-rod distances. Dipole–dipole distances play a critical role in the induced plasmonic chirality. The orientation dependence of induced CD was further verified by AuNR/Au nanosphere (AuNS) heterodimers. The experimental results of the plasmonic CD agreed well with theoretical calculations.

Graphical abstract: Tunable optical activity of plasmonic dimers assembled by DNA origami

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Article information

DOI
https://doi.org/10.1039/C5NR01634G
Article type
Communication
Submitted
13 Mar 2015
Accepted
15 Apr 2015
First published
20 Apr 2015

Nanoscale, 2015,7, 9147-9152

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Tunable optical activity of plasmonic dimers assembled by DNA origami

C. Rao, Z. Wang, N. Li, W. Zhang, X. Xu and B. Ding, Nanoscale, 2015, 7, 9147 DOI: 10.1039/C5NR01634G

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