Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany.
J Am Chem Soc. 2009 Dec 9;131(48):17566-75. doi: 10.1021/ja9007479.
Tungsten oxide nanorods were synthesized by a soft chemistry approach using tungsten alkoxide and trioctyl amine and oleic acid as the surfactants. The optical properties of the nanorods were studied. The nanorods were found to be soluble in a wide range of solvents like chloroform, cyclohexane, and so on. Upon solvent evaporation, the nanorods formed hierarchically organized solid state structures. Depending on the solvent used, the nanorods organized in different mesostructures. Moreover, the organization of the nanorods from mixtures of polar and nonpolar solvents was studied. Here, the Marangoni effect resulting from differences in the surface tensions of the two solvents was found to play a role in the organization of the nanorods. Furthermore, dip coating of the nanorod solutions on a mica substrate resulted in the formation of a uniform thin film of the nanorods, which may be useful for a variety of applications such as in electrochromic devices and in organic light emitting devices (OLEDs) using tungsten oxide as a buffer layer.
氧化钨纳米棒通过使用钨醇盐和三辛胺以及油酸作为表面活性剂的软化学方法合成。研究了纳米棒的光学性质。发现纳米棒可溶于氯仿、环己烷等多种溶剂。溶剂蒸发后，纳米棒形成了分级组织的固态结构。根据所用溶剂的不同，纳米棒以不同的介孔结构组织。此外，还研究了来自极性和非极性溶剂混合物的纳米棒的组织。这里，发现两种溶剂的表面张力差异导致的马兰戈尼效应在纳米棒的组织中起作用。此外，将纳米棒溶液在云母基底上进行浸涂，导致纳米棒形成均匀的薄膜，这可能对各种应用有用，例如在电致变色器件和使用氧化钨作为缓冲层的有机发光器件（OLED）中。
