本文阐述了一种简便灵活的方法制备形貌可控的高纯度胶体级金纳米片。在一个以CTAB为稳定剂的种子生长法合成系统中，通过调节种子和碘离子的用量，可以制备边长140-30 nm不等而厚度、晶型相同的金纳米片。通过控制体系的离子强度，可以容易地将制得的金纳米片与球形金纳米颗粒分离。本文也对储存手段和可能的制备、分离机制进行了研究。
X Fan, Z R Guo, J M Hong, Y Zhang, J N Zhang and N Gu. Size-controlled growth of colloidal gold nanoplates and their high-purity acquisition , Nanotechnology 21 (2010) 105602
Figure 1. (a) UV–vis–NIR spectrum, (b) TEM images, (c) HRTEM image, and (d) SAED pattern of the redispersed gold nanoplates using 1× seeds and I−. The inset in panel (a) shows a digital photograph of the gold nanoplates. The inset in panel (b) shows a TEM image of a stack of the gold nanoplates. The spots in (d) marked by a box, circle, and triangle correspond to 1/3{422}, {220}, and {422} diffractions, respectively.
Figure 2. Schematic of the size-control process. The number of free gold atoms is a constant. If there are more seeds in the reaction solution, the number of gold atoms adding to each seed decreases. As a result, smaller gold nanoplates are produced.
