Single-walled carbon nanotubes (SWNTs) were produced with a high content us
ing a newly designed chamber. The feature of the chamber is that the DC arc
-generation section is connected horizontally to the heater section with th
e filtering zone. Soot with a high content of SWNTs is selectively trapped
on the sample collector located in the heater section, utilizing the flight
distance of arc-produced components in the filtering zone under controlled
gas flow. Further SW-NT growth was demonstrated during in situ heat treatm
ent in the heater section. The G/D value, which is obtained from Raman spec
troscopy and is a good index of SWNT content, increased from 4.3 to 25.9. (
C) 2001 Elsevier Science B.V. All rights reserved.