Reversible Plasmonic Circular Dichroism of Au Nanorod and DNA Assemblies

Reversible Plasmonic Circular Dichroism of Au Nanorod and DNA Assemblies

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...

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Veröffentlicht in:Journal of the American Chemical Society 2012-02, Vol.134 (7), p.3322-3325
Hauptverfasser: Li, Zhengtao, Zhu, Zhening, Liu, Wenjing, Zhou, Yunlong, Han, Bing, Gao, Yan, Tang, Zhiyong
Format: Artikel
Sprache:eng
Schlagworte:
Circular Dichroism
DNA - chemistry
Gold - chemistry
Nanotubes - chemistry
Temperature
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Zusammenfassung: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.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja209981n