Xu Jun, Zhang Weixin, Yang Zeheng, Yang Shihe
School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, People's Republic of China.
Inorg Chem. 2008 Jan 21;47(2):699-704. doi: 10.1021/ic701448k. Epub 2007 Dec 14.
A series of well-aligned arrays of copper chalcogenide nanostructures, including Cu(7)S(4) and Cu(2-x)Se nanotubes with double walls have been successfully prepared by using Cu(OH)(2) nanorods as sacrificial templates. This new method is based on layer-by-layer chemical conversion and inward etching of the sacrificial templates, which is essentially a kind of lithography inside the Cu(OH)(2) nanorods. The key step of the process involves repeated formation of the copper chalcogenide wall and the dissolution of the Cu(OH)(2) core for two consecutive cycles. A large difference of the solubility product (Ksp) between the copper chalcogenide wall and the Cu(OH)(2) core materials is crucial for the direct replacement of one type of anions by the other. Our work provides a novel and general approach to the controllable synthesis of the arrays of copper chalcogenide nanotubes with double walls and complex hierarchies.
通过使用氢氧化铜纳米棒作为牺牲模板，成功制备了一系列排列良好的铜硫属化物纳米结构阵列，包括具有双壁的 Cu(7)S(4) 和 Cu(2-x)Se 纳米管。这种新方法基于牺牲模板的逐层化学转化和向内蚀刻，这本质上是一种在氢氧化铜纳米棒内部的光刻技术。该过程的关键步骤包括连续两个循环重复形成铜硫属化物壁和溶解氢氧化铜核心。铜硫属化物壁和氢氧化铜核心材料之间的溶度积 (Ksp) 存在很大差异，这对于一种阴离子直接被另一种阴离子取代至关重要。我们的工作为可控合成具有双壁和复杂层次结构的铜硫属化物纳米管阵列提供了一种新颖且通用的方法。
