Facile synthesis of gold-silver nanocages with controllable pores on the surface
Facile synthesis of gold-silver nanocages with controllable pores on the surface
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DOI：
10.1021/ja066023g
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发表时间：
2006-11-22
影响因子：
15
通讯作者：
Xia, Younan
中科院分区：
文献类型：
--
作者：
Chen, Jingyi;McLellan, Joseph M.;Xia, Younan
通过截短的Ag纳米立方体与HAuCl 4水溶液之间的电置换反应，合成了表面具有可控孔隙的金-银合金纳米笼。与以前的研究不同，置换反应以可控的方式开始，同时从{111}面暴露的截短Ag纳米立方体的八个角开始。在所有的角落与孔的立方纳米笼的形成是由封端剂，聚（乙烯基吡咯烷酮）（PVP），它优先覆盖截短的银纳米立方体的{100}面。
Gold−silver alloy nanocages with controllable pores on the surface have been synthesized via galvanic replacement reaction between truncated Ag nanocubes and aqueous HAuCl4. Unlike in the previous studies, the initiation of replacement reaction started in a controllable way, simultaneously from eight corners of the truncated Ag nanocubes where {111} facets were exposed. The formation of cubic nanocages with pores at all the corners was determined by the capping agent, poly(vinyl pyrrolidone) (PVP), which preferentially covered the {100} facets of a truncated Ag nanocube.