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Nano Research

, Volume 10, Issue 6, pp 2146–2155 | Cite as

Cooperative interactions among CTA+, Br and Ag+ during seeded growth of gold nanorods

  • Yong Xu
  • Lei Chen
  • Xingchen Ye
  • Xuchun Wang
  • Jiaqi Yu
  • Yang Zhao
  • Muhan Cao
  • Zhouhui Xia
  • Baoquan SunEmail author
  • Qiao ZhangEmail author
Research Article

Abstract

We have carried out a comprehensive study on the formation mechanism of Au nanorods (AuNRs) in binary surfactant mixtures composed of quaternary ammonium halide and sodium oleate (NaOL). We identify the cetyltrimethyl ammonium (CTA)-Br-Ag+ complex as the key ingredient in directing the anisotropic growth of AuNRs. Based on the improved understanding of the cooperative interactions among CTA+, Br and Ag+, we further demonstrate that AgBr, which is readily solubilized by the cetyltrimethyl ammonium bromide (CTAB) or cetyltrimethyl ammonium chloride (CTAC) micelles, can be employed as the combined source of Ag+ and Br for the preparation of AuNRs. The growth of high-quality AuNRs can be completed within 15 min under extremely low bromide content (0.1 mM).

Keywords

gold nanorods anisotropic nanostructure surface plasmon resonance seeded growth cetyltrimethyl ammonium bromide (CTAB) 

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Notes

Acknowledgements

We acknowledge the Collaborative Innovation Center of Suzhou Nano Science & Technology, the SWC Center for Synchrotron Radiation Research, the Priority Academic Program Development of Jiangsu Higher Education Institu-tions, the National Natural Science Foundation of China (Nos. 21401135 and 21673150) and the Natural Science Foundation of Jiangsu Province (No. BK20140304) for funding support.

Supplementary material

12274_2016_1404_MOESM1_ESM.pdf (3.4 mb)
Cooperative interactions among CTA+, Br and Ag+ during seeded growth of gold nanorods

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Yong Xu
    • 1
  • Lei Chen
    • 1
  • Xingchen Ye
    • 2
  • Xuchun Wang
    • 1
  • Jiaqi Yu
    • 1
  • Yang Zhao
    • 1
  • Muhan Cao
    • 1
  • Zhouhui Xia
    • 1
  • Baoquan Sun
    • 1
    Email author
  • Qiao Zhang
    • 1
    Email author
  1. 1.Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano and Soft Materials (FUNSOM)Soochow UniversitySuzhouChina
  2. 2.Department of ChemistryUniversity of California BerkeleyBerkeleyUSA

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