Shape-controlled synthesis of gold and silver nanoparticles
Shape-controlled synthesis of gold and silver nanoparticles
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DOI：
10.1126/science.1077229
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发表时间：
2002-12-13
期刊：
影响因子：
56.9
通讯作者：
Xia, YN
中科院分区：
文献类型：
--
作者：
Sun, YG;Xia, YN
在聚乙烯吡咯烷酮（PVP）存在下，用乙二醇还原硝酸银，大量合成了单分散的银纳米立方体样品。这些立方体是单晶体，其特征在于由{100}、{110}和{111}面界定的略微截断的形状。PVP的存在及其相对于银硝酸盐的摩尔比（以重复单元计）在决定产物的几何形状和尺寸方面都起重要作用。这些银立方体可以作为牺牲模板来生成金的单晶纳米盒：由六个{100}和八个{111}面包围的中空多面体。控制金属纳米颗粒的尺寸、形状和结构在技术上是重要的，因为这些参数与光学、电学和催化性能之间存在很强的相关性。
Monodisperse samples of silver nanocubes were synthesized in large quantities by reducing silver nitrate with ethylene glycol in the presence of poly( vinyl pyrrolidone) (PVP). These cubes were single crystals and were characterized by a slightly truncated shape bounded by {100}, {110}, and {111} facets. The presence of PVP and its molar ratio ( in terms of repeating unit) relative to silver nitrate both played important roles in determining the geometric shape and size of the product. The silver cubes could serve as sacrificial templates to generate single-crystalline nanoboxes of gold: hollow polyhedra bounded by six {100} and eight {111} facets. Controlling the size, shape, and structure of metal nanoparticles is technologically important because of the strong correlation between these parameters and optical, electrical, and catalytic properties.