Details

Autor(en) / Beteiligte

• Xu, Yong
• Chen, Lei
• Ye, Xingchen
• Wang, Xuchun
• Yu, Jiaqi
• Zhao, Yang
• Cao, Muhan
• Xia, Zhouhui
• Sun, Baoquan
• Zhang, Qiao

Titel

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

Ist Teil von

• Nano research, 2017-06, Vol.10 (6), p.2146-2155

Ort / Verlag

Beijing: Tsinghua University Press

Erscheinungsjahr

2017

Quelle

SpringerNature Journals

Beschreibungen/Notizen

• 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）.