Growth of high quality, high density single-walled carbon nanotube forests on copper foils

Growth of high quality, high density single-walled carbon nanotube forests on copper foils

Journal Article

Abstract

​​We demonstrate the growth of high quality single-walled carbon nanotube (SWCNT) forests on commercial Cu foils by cold-wall chemical vapor deposition. Time-of-flight secondary ion mass spectrometry was employed to study the effect of annealing on the catalyst evolution with or without an AlOx barrier layer. X-ray photoelectron spectroscopy was used to investigate the chemical states of the catalyst and the barrier layer. SWCNT forests can be reproducibly grown on Cu foils sputter-coated with Al and Fe layers as thin as 6 nm and 0.4 nm, respectively. Al transforms into AlOx on exposure to air and during annealing. Most importantly, such a thin AlOx barrier layer ensures not only the growth of SWCNTs but also an Ohmic contact between the as grown SWCNTs and the Cu base as measured by a two-point probe station. The as-grown SWCNTs exhibit a bimodal distribution of diameters ranging from 0.6 to 4.5 nm, with two peaks centered at 0.8 nn and 2.6 nm, respectively.​

Details

PUBLISHED IN
Carbon, 98, 624-632
PUBLICATION DATE
01 maaliskuuta 2016
AUTHORS
G.F. Zhong, J.W. Yang, H. Sugime, R. Rao, J.W. Zhao, D.M. Liu, A.R. Harutyunyan, J. Robertson