Cetyltrimethylammonium bromide silver bromide complex as the capping agent of gold nanorods
Cetyltrimethylammonium bromide silver bromide complex as the capping agent of gold nanorods
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DOI：
10.1021/la801711q
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发表时间：
2008-09-02
期刊：
影响因子：
3.9
通讯作者：
Spalla, Olivier
中科院分区：
文献类型：
--
作者：
Hubert, Fabien;Testard, Fabienne;Spalla, Olivier
十六烷基三甲基溴化铵（CTAB）表面活性剂与溴化银（CTASB）之间的配合物经核磁共振和x射线光电子能谱（XPS）鉴定为金纳米棒表面的实体。在经典的综合方案中产生了前缘原位形成。因此，它可以直接与初始反应物一起引入，以代替银(I)盐，以产生这些物体的新的有效合成。XPS和石英晶体微天平（QCM）在宏观金表面的互补测量证实了CTASB的强吸附，比CTAB和任何其他CTAX表面活性剂都要高。强调了CTASB作为表面络合的棒诱导剂的作用。
A complex between cetyltrimethylammonium bromide (CTAB) surfactant and silver bromide (CTASB) is recognized by NMR and X-ray photoelectron spectroscopy (XPS) to be the entity at the Surface of gold nanorods. resulting front ail in situ formation in the classical scheme of synthesis. It can thus be introduced directly along with the initial reactants in place of silver(I) salt to produce a new effective synthesis of these objects. Complementary XPS and quartz crystal microbalance (QCM) measurements on macroscopic gold surfaces confirm a strong adsorption of CTASB that is higher than that of CTAB and any other CTAX surfactants. The role of CTASB as a rod inducing agent by surface complexation is stressed.