An essential role of CO2 and H2O during single-walled CNT synthesis from carbon monoxide

Albert Nasibulin, David Brown, Paula Queipo, David Gonzalez, Hua Jiang, Esko I. Kauppinen (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

121 Citations (Scopus)


Single-walled carbon nanotubes (CNTs) were synthesized from carbon monoxide and iron catalyst nanoparticles by two different aerosol methods. The catalyst particles were produced by physical vapor nucleation using a resistively heated iron wire (hot wire generator) and by thermal decomposition of ferrocene vapor. The essential role of etching agents (CO2 and H2O) in the CNT formation process was demonstrated. An addition of small amounts of CO2 and H2O vapor in the reactor resulted in an increase in CNT length. Also, the CO2 introduction was found to decrease the minimum temperature for CNT synthesis from 890 °C to below 600 °C.
Original languageEnglish
Pages (from-to)179-184
JournalChemical Physics Letters
Issue number1-3
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed


  • carbon nanotubes
  • iron catalyst nanoparticles
  • aerosol methods
  • vapors


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