Wang Yilong, Camargo Pedro H C, Skrabalak Sara E, Gu Hongchen, Xia Younan
Department of Chemistry, University of Washington, Seattle, Washington 98195, USA.
Langmuir. 2008 Oct 21;24(20):12042-6. doi: 10.1021/la8020904. Epub 2008 Sep 26.
We report a facile and environmentally friendly method of preparing highly branched silver nanostructures. By reducing AgNO 3 with l-ascorbic acid in an aqueous solution, silver particles having a coral-like morphology were formed in a few minutes. A mechanistic study of the growth process revealed that the silver branches grew from a bulbous seed formed through aggregation, and that by changing the concentrations of the reagents, the degree of particle branching could be altered. With their potentially high surface areas, these branched structures could find use as catalysts or as substrates for surface-enhanced Raman scattering applications.
我们报道了一种制备高度分支银纳米结构的简便且环保的方法。通过在水溶液中用L-抗坏血酸还原硝酸银，几分钟内就形成了具有珊瑚状形态的银颗粒。对生长过程的机理研究表明，银分支从通过聚集形成的球状种子生长而来，并且通过改变试剂的浓度，可以改变颗粒分支的程度。由于其潜在的高表面积，这些分支结构可作为催化剂或用于表面增强拉曼散射应用的基底。
