硫醇链长对Au纳米粒子稳定性的影响
Influence of mercaptan chain length on the stability of gold nanoparticles
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摘要: 使用氢醌还原氯金酸制得Au纳米粒子(粒径约20 nm),并在Au表面修饰不同链长的烷基硫醇(乙硫醇、正丁硫醇、1-己硫醇、辛硫醇、十二烷基硫醇和正十八烷基硫醇),探讨不同链长的硫醇对Au纳米粒子稳定性的影响.通过透射电子显微镜、紫外-可见分光光度计、Zeta电位仪对Au纳米粒子的结构与形貌及硫醇修饰的Au纳米粒子的稳定性进行表征,结果表明:硫醇加入量一定的情况下,硫醇链长越长Au纳米粒子的稳定性越好.Abstract: Spherical gold nanoparticles (GNPs) of approximately 20 nm were synthesized using the hydroquinone reduction HAuCl4 method and modified GNPs using the alkyl mercaptan with different chains (ethyl mercaptan,butyl mercaptan,1-hexyl mercaptan, n-octyl mercaptan, dodecyl mercaptan and octadecyl mercaptan). The particles have been characterised by UV-vis spectrophotometer, high resolution transmission electron microscopy (TEM) and Zeta potential analyzer. The results showed that with the increase of alkyl length,the GNPs become stability under the same concentration conditions.
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Key words:
- gold nanoparticles /
- mercaptan /
- stability
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