DNA‐Encoded Tuning of Geometric and Plasmonic Properties of Nanoparticles Growing from Gold Nanorod Seeds |
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| Authors: | Tingjie Song Dr. Longhua Tang Li Huey Tan Dr. Xiaojing Wang Nitya Sai Reddy Satyavolu Dr. Hang Xing Dr. Zidong Wang Prof. Jinghong Li Prof. Haojun Liang Prof. Yi Lu |
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| Affiliation: | 1. CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China, Hefei, Anhui 230026 (P. R. China);2. Department of Chemistry, Department of Materials Science and Engineering, University of Illinois at Urbana‐Champaign, Urbana, IL 61801 (USA);3. Department of Chemistry, Beijing Key Laboratory for Analytical Methods and Instrumentation, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084 (P. R. China) |
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| Abstract: | ![]()
Systematically controlling the morphology of nanoparticles, especially those growing from gold nanorod (AuNR) seeds, are underexplored; however, the AuNR and its related morphologies have shown promises in many applications. Herein we report the use of programmable DNA sequences to control AuNR overgrowth, resulting in gold nanoparticles varying from nanodumbbell to nanooctahedron, as well as shapes in between, with high yield and reproducibility. Kinetic studies revealed two representative pathways for the shape control evolving into distinct nanostructures. Furthermore, the geometric and plasmonic properties of the gold nanoparticles could be precisely controlled by adjusting the base compositions of DNA sequences or by introducing phosphorothioate modifications in the DNA. As a result, the surface plasmon resonance (SPR) peaks of the nanoparticles can be fine‐tuned in a wide range, from visible to second near‐infrared (NIR‐II) region beyond 1000 nm. |
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| Keywords: | DNA gold nanoparticles nanostructures surface plasmon resonance |
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