Reversible plasmonic circular dichroism of Au nanorod and DNA assemblies |
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| Authors: | Li Zhengtao Zhu Zhening Liu Wenjing Zhou Yunlong Han Bing Gao Yan Tang Zhiyong |
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| Affiliation: | Laboratory for Nanomaterials, National Center for Nanoscience and Technology, No. 11 Beiyitiao, Zhongguancun, Beijing 100190, China. |
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| Abstract: | Reversible plasmonic circular dichroism (CD) responses are realized for the first time based on temperature-dependent assembly and disassembly of Au nanorod (Au NR) and DNA hybrids. Compared with the conventional UV-vis absorption spectra, the changes in both intensity and line shape of plasmonic CD signals are much more pronounced, leading to a preliminary detection limit of DNA as low as 75 nM. The mechanism and influence factors of reversible plasmonic CD responses are explored. |
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