金银合金纳米粒子的制备  

Synthesis of Au-Ag Alloy Nanoparticles

作　　者：胡芳[1] 孟卫[1] 张燕[1] 张玲艳[2] 王险峰[1] 

机构地区：[1]中国药科大学物理化学教研室,江苏南京211198 [2]南京理工大学化工学院,江苏南京210094

出　　处：《五邑大学学报（自然科学版）》2011年第1期33-36,共4页Journal of Wuyi University(Natural Science Edition)

摘　　要：以柠檬酸钠为稳定剂,利用硼氢化钠还原AgNO3和HAuCl4混合溶液制备了Au-Ag合金纳米粒子,UV-Vis光谱谱图只观察到一个位于纯银和纯金之间的表面等离子体共振峰,且该表面等离子体共振峰的最大吸收波长与合金中Au的摩尔分数成线性关系.TEM结果表明:Au-Ag合金纳米粒子的粒径大约为43 nm,且颜色均一,没有明显的核壳结构.Gold-silver alloy nanoparticles were prepared in a solution made by reducing HAuCh and AgNO3 with sodium borohydride and using trisodium citrate as a capping agent. Only a surface plasmon resonance peak was observed in the UV-Vis spectra and the SPR band of Au-Ag nanoparticles shifts linearly to the red with increasing Au content. Due to TEM, nanoparticles are about 43 nm and lack an apparent core-shell structure. It is concluded that the nanoparticles are alloys rather than core-shell composites.

关 键 词：柠檬酸钠 硼氢化钠 Au—Ag合金纳米粒子 

分 类 号：O614[理学—无机化学]