Non-catalytic growth of multiwall carbon nanotubes in hydrothermal fluids

Jose M. Calderon-Moreno, Masahiro Yoshimura

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Hollow multiwall carbon nanotubes made of well-ordered concentric graphitic layers were synthesized by hydrothermal treatment of amorphous carbon in pure water, at 800°C and 100 MPa, in the absence of metal catalyst. The condensed solid products, characterized by high-resolution transmission electron microscopy (HRTEM) and Raman spectroscopy, are almost free of the amorphous phase; micro-Raman spectroscopy reveals that the hydrothermal multiwall carbon nanotubes have a characteristic concentric graphitic lattice without edges or plane terminations in the basal plan, showing close-edge morphologies. The mechanism of carbon multiwall growth in hydrothermal fluids from condensed phases and in the absence of transition metal catalysts is presented.

Original languageEnglish
Pages (from-to)2159-2162
Number of pages4
JournalKey Engineering Materials
Issue number213 PART 3
Publication statusPublished - 2001 Jan 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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