STRUCTURAL STUDIES OF TRIGONAL LAMELLAR PARTICLES OF GOLD AND SILVER
STRUCTURAL STUDIES OF TRIGONAL LAMELLAR PARTICLES OF GOLD AND SILVER
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DOI：
10.1098/rspa.1993.0035
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发表时间：
1993-03-08
期刊：
影响因子：
--
通讯作者：
SMITH, DJ
中科院分区：
文献类型：
--
作者：
KIRKLAND, AI;JEFFERSON, DA;SMITH, DJ
详细的结构研究结果的三角层状颗粒的金和银。的颗粒已被其特征在于在溶胶中通过光谱和粉末X-射线衍射和溶胶外使用高分辨率电子显微镜在平面图和轮廓成像模式。这些研究的结果表明，颗粒具有三角形轮廓，并沿[111]方向沿着缩短以得到板状形态。少量平行{111}孪晶面的存在也被证实，并被用来解释在平面图中观察到的形式上禁止的1/3{422}反射的存在。观察这种反射的精确结构要求也已使用多层计算得到证实。这些颗粒的可能的生长机制进行了讨论。
The results of detailed structural studies of trigonal lamellar particles of both gold and silver are presented. The particles have been characterized both in sol by means of optical spectroscopy and powder X-ray diffraction and ex sol using high resolution electron microscopy in both plan view and profile imaging modes. The results of these studies have indicated that the particles have a trigonal outline and are shortened along a [111] direction to give a plate-like morphology. The presence of small numbers of parallel {111} twin planes has also been confirmed and used to explain the presence of the formally forbidden 1/3{422} reflections observed in plan view. The precise structural requirements for the observation of such reflections has also been confirmed using multislice calculations. Possible growth mechanisms for these particles are also discussed.