Facile synthesis of gold nanoflowers as SERS substrates and their morphological transformation induced by iodide ions

We report a new strategy to prepare gold nanoflowers （AuNFs） using a two-step seed-mediated method. The as-prepared AuNFs were employed as surface-enhance Raman scattering （SERS） substrates, showing strong signal enhancement. We further found that iodide ions （I^-） could selectively induce the morph...

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Bibliographic Details
Published in:Science China. Chemistry 2016-08, Vol.59 (8), p.1045-1050
Main Authors: Zhen, Shujun, Wu, Tong, Huang, Xin, Li, Yuanfang, Huang, Chengzhi
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Gold
Raman spectra
SERS活性
Substrates
Surface plasmon resonance
准备金
基底
形态转化
碘离子
纳米
表面增强拉曼散射
诱导合成
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Summary:We report a new strategy to prepare gold nanoflowers （AuNFs） using a two-step seed-mediated method. The as-prepared AuNFs were employed as surface-enhance Raman scattering （SERS） substrates, showing strong signal enhancement. We further found that iodide ions （I^-） could selectively induce the morphological transformation of AuNFs to spheres, resulting in a blue-shift of the localized surface plasmon resonance （LSPR） bands, a color change of the AuNFs solution from blue to red, and decreased SERS activity. This behavior allows the AuNFs to be used in the determination of I^-.
ISSN:1674-7291
1869-1870
DOI:10.1007/s11426-015-0482-5