Open AccessStudy on the growth of aligned carbon nanotubes controlled by ion bombardment
Author(s) -
Biben Wang,
Bing Zhang,
Kun Zheng,
Hao Wei,
Wanlu Wang,
Liao Ke-jun
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.1255
Subject(s) - carbon nanotube , materials science , ion , carbon fibers , substrate (aquarium) , chemical vapor deposition , glow discharge , field electron emission , nanotechnology , plasma , chemical engineering , composite material , chemistry , electron , organic chemistry , composite number , physics , quantum mechanics , oceanography , geology , engineering
Aligned carbon nanotubes were prepared by plasma-enhanced hot filament chemical vapor deposition using CH4, H2, and NH3 as reaction gases. It was investigated how different negative bias affects the growth of aligned carbon nanotubes. The results indicate that the average diameter of the aligned carbon nanotubes is reduced and the average length of the aligned carbon nanotubes is increased with increasing negative bias. Because of the occurrence of glow discharge, a cathode sheath forms near the substrate surface, and a number of ions are produced in it, and a very strong electrical field builds up near the substrate surface. Under the effect of the field, the strong bombardment of ions on the substrate surface will influence the growth of aligned carbon nanotubes. Combined with related theories, we have analyzed and discussed the ion bombardment effects on the growth of the aligned carbon nanotubes.