Influence of total gas flow on carbon nanotube forests synthesised by water-assisted chemical vapour deposition

Author

Youxuan Liang ; Chuan Jiang ; Bin Zhao ; Junhe Yang

Author_Institution

Sch. of Energy & Power Eng., Univ. of Shanghai for Sci. & Technol., Shanghai, China

Volume

8

Issue

11

fYear

2013

fDate

Nov-13

Firstpage

779

Lastpage

782

Abstract

The influence of total gas flow on the growth of carbon nanotube (CNT) forests in water-assisted chemical vapour deposition has been investigated. It was found that the average height of the CNT forests decreased gradually from 996.53 to 696.8 μm, and the growth yield decreased notably from 2.91 to 1.98 mg/cm² as the total flow increased, but the crystallinity and thermostability of CNT forests increased with increasing total flow. Investigation on CNT growth kinetics suggested that increasing the total flow could decrease the growth rate and shorten catalyst lifetime because of decreased gas dwell time and enhanced subsurface diffusion of Fe catalyst.

Keywords

carbon nanotubes; catalysts; chemical vapour deposition; iron; nanofabrication; surface diffusion; thermal stability; C; Fe; average height; carbon nanotube forests; catalyst lifetime; crystallinity; gas dwell time; growth kinetics; growth yield; subsurface diffusion; thermostability; total gas flow; water-assisted chemical vapour deposition;

fLanguage

English

Journal_Title

Micro & Nano Letters, IET

Publisher

iet

ISSN

1750-0443

Type

jour

DOI

10.1049/mnl.2013.0526

Filename

6678376