Barreiro Amelia, Hampel Silke, Rümmeli Mark H, Kramberger Christian, Grüneis Alexander, Biedermann Kati, Leonhardt Albrecht, Gemming Thomas, Büchner Bernd, Bachtold Adrian, Pichler Thomas
IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany.
J Phys Chem B. 2006 Oct 26;110(42):20973-7. doi: 10.1021/jp0636571.
A new method to grow bulk quantities of single-walled carbon nanotubes (SWCNTs) by a catalytic chemical vapor deposition (CVD) process with the possibility of varying the pressure has been developed and is reported in this paper. Thermal decomposition of ferrocene provides both catalytic particles and carbon sources for SWCNT growth using Ar as a carrier gas. Upon an increase in the pressure, the mean diameter of the SWCNTs decreases. In fact, high abundances of SWCNT with diameters as small as 0.7 nm, which is the limit for stable caps with isolated pentagons, can be obtained. An additional advantage of this method is that as no external carbon sources are required, SWCNT synthesis can be achieved at temperatures as low as 650 degrees C.
本文报道了一种通过催化化学气相沉积（CVD）工艺生长大量单壁碳纳米管（SWCNT）的新方法，该方法具有改变压力的可能性。以氩气作为载气，二茂铁的热分解为SWCNT的生长提供了催化颗粒和碳源。随着压力的增加，SWCNT的平均直径减小。实际上，可以获得大量直径小至0.7nm的SWCNT，这是具有孤立五边形的稳定帽的极限。该方法的另一个优点是，由于不需要外部碳源，因此可以在低至650摄氏度的温度下实现SWCNT的合成。
