Open AccessPlasma-induced transformation of carbon nanotubes to nanocrystalline diamond
Author(s) -
Litao Sun,
Jinlong Gong,
ZY Zhu,
Dong Zhu,
He Suixia,
Zhenxia Wang
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.53.3467
Subject(s) - diamond , materials science , nucleation , amorphous carbon , carbon fibers , graphite , hydrogen , chemical engineering , amorphous solid , carbon film , carbide derived carbon , carbon nanotube , material properties of diamond , nanotechnology , chemical physics , carbon nanofiber , composite number , composite material , thin film , crystallography , chemistry , organic chemistry , engineering
Structural phase transformation from multiwalled carbon nanotubes to nanocr ystalline diamond by hydrogen plasma posttreatment was carried out. Ultrahigh equivalent diamond nucleation density above 1011 nuclei/cm2 was easily obtained . The diamond formation and growth mechanism was proposed to be the consequence of the formation of sp3 bonded amorphous carbon clusters. The hydrogen chemi so rption on curved graphite network and the energy deposited on the carbon nanotu bes by continuous impingement of activated molecular or atomic hydrogen are resp onsible for the formation of amorphous carbon matrix. The diamond nucleates and grows in the way similar to that of diamond CVD processes on amorphous carbon films. The present method of hydrogen treatment provides a controllable way for the CVD of high quality diamond films.