期刊
ACS NANO
卷 7, 期 2, 页码 1100-1107出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn304064u
关键词
carbon nanotubes; CVD growth; phase transition; Raman spectroscopy; in situ
类别
资金
- Air Force Office of Scientific Research (AFOSR)
- National Research Council
The physical state of the catalyst and its impact on the growth of single-walled carbon nanotubes (SWNTs) is the subject of a long-standing debate. We addressed it here using in situ Raman spectroscopy to measure Fe and Ni catalyst lifetimes during the growth of individual SWNTs across a wide range of temperatures (500-1400 degrees C). The temperature dependence of the Fe catalyst lifetimes underwent a sharp increase around 1100 C due to a solid-to-liquid phase transition. By comparing experimental results with the metal carbon phase diagrams, we prove that SWNTs can grow from solid and liquid phase-catalysts, depending on the temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据