Einarsson Erik, Kadowaki Masayuki, Ogura Kazuaki, Okawa Jun, Xiang Rong, Zhang Zhengyi, Yamamoto Takahisa, Ikuhara Yuichi, Maruyama Shigeo
Department of Mechanical Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
J Nanosci Nanotechnol. 2008 Nov;8(11):6093-8. doi: 10.1166/jnn.2008.sw22.
An in situ optical absorbance technique was used to monitor the growth of vertically aligned single-walled carbon nanotubes (VA-SWNTs) at various temperatures and pressures. The effects of the growth temperature and ethanol pressure on the initial growth rate and catalyst lifetime were investigated. It was found that the ideal pressure for VA-SWNT synthesis changes with the growth temperature, shifting toward higher pressure as the growth temperature increases. It was also found that the growth reaction is first-order below this ideal pressure. Additionally, the internal structure of the VA-SWNT film was observed at different depths into the film by transmission electron microscopy. The absence of large bundles was confirmed, and little change in the structure was observed to a depth of approximately 1 microm.
采用原位光吸收技术监测垂直排列的单壁碳纳米管（VA-SWNTs）在不同温度和压力下的生长情况。研究了生长温度和乙醇压力对初始生长速率和催化剂寿命的影响。结果发现，VA-SWNT合成的理想压力随生长温度而变化，随着生长温度升高，理想压力向更高值偏移。还发现，在该理想压力以下，生长反应为一级反应。此外，通过透射电子显微镜观察了VA-SWNT薄膜不同深度处的内部结构。证实不存在大的管束，并且在约1微米深度内观察到结构几乎没有变化。
