Oxide-driven carbon nanotube growth in supported catalyst CVD.
Detailed HREM studies on carbon nanotubes (CNTs) synthesized via chemical vapor deposition (CVD) using nanoengineered Fe particles on oxide supports show capped tops and open-ended roots. We demonstrate that the pristine catalyst particle dictates the CNT diameter and number of walls at nucleation. The consecutive inward formation of concentric graphene caps during nucleation constricts and elongates the catalyst particle within the tube core. Continued growth stems from the oxide support.
IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany. mhr1967@yahoo.com
Mark H
MH
Rümmeli
Franziska
F
Schäffel
Christian
C
Kramberger
Thomas
T
Gemming
Alicja
A
Bachmatiuk
Ryszard J
RJ
Kalenczuk
Bernd
B
Rellinghaus
Bernd
B
Büchner
Thomas
T
Pichler