Synthesis of single-crystalline tungsten nanowires by nickel-catalyzed vapor-phase method at 850 °C
- 作者：Shiliang Wang ; Yuehui He ; Jin Zou ; Yao Jiang ; Jian Xu ; Baiyun Huang ; C.T. Liu ; P.K. Liaw
- 关键词：A1. Nanowires ; A3. Vapor– ; solid– ; solid mechanism ; B1. Metallic tungsten
- 刊名：Journal of Crystal Growth
- 出版年：2007
- 期刊代码：49_00220248
- 类别：ch
- 出版时间：15 August 2007
- 卷：306
- 期：2
- 页码：433-436
- 文件大小：400 K
摘要
Single-crystalline tungsten nanowires have been synthesized by nickel-catalyzed vapor-phase methods at a temperature of 850 °C. The synthesis temperature is significantly below the eutectic temperature of Ni–W binary system (1495 °C), which indicates that the growth of the nickel-catalyzed tungsten nanowires should be controlled by the vapor–solid–solid mechanism. Moreover, calculation results show that the W atoms for the nanowire growth should be transported by the surface diffusion along the hemispherical catalyst particle shell to the interface between catalyst particle and the growing W nanowires. Our study, for the first time, demonstrates that the powerful metal-catalyzed methods are feasible to process metallic nanowires.