High-quality single-walled carbon nanotubes (SWNTs) are a key aspect in the emerging
field nanotechnology. Although many approaches have been developed, the research on the
synthesis of SWNTs is still needed. In this study, we report the synthesis of high-quality SWNTs by
floating catalyst chemical vapor deposition, which employs ferrocene as the catalyst precursors. We
obtained massive deposits at low temperature region. The deposits were characterized by scanning
electron microscopy, transmission electron microscopy, and visual laser Raman spectroscopy. The
Raman spectrum obtained from raw deposits shows clear radial breathing mode at the range from
180cm-1 to 300cm-1 and high-intensity graphite mode at 1577.7cm-1 with a shoulder at 1550.5cm-1,
and almost no detectable peak around at 1545cm-1, which is induced by defects, is observed. These
results indicate that the deposits are high-quality SWNTs.
Type- and Species-Selective Air Etching of Single-Walled Carbon Nanotubes Tracked with in Situ Raman Spectroscopy
