Hydrothermal synthesis of nano-sized iron oxide crystals in the cavity of carbon nanotubes

Keitaro Matsui, Takashi Kyotani, Akira Tomita

Research output: Contribution to journalConference articlepeer-review

9 Citations (Scopus)


Highly crystallized iron oxide nanorods were fabricated by hydrothermal synthesis in the cavity of carbon-coated nanochannels with a diameter of 25 nm. The carbon-coated nanochannels were prepared by uniform carbon coating on the inner walls of the straight nanochannels of an anodic aluminum oxide film. Iron nitrate was loaded in the nanochannels by impregnation method and then subjected to hydrothermal treatment with NaOH aqueous solution in an autoclave. Upon the treatment, the aluminum oxide template was dissolved to leave carbon nanotubes, in which highly crystallized nanorods of α-Fe2O3 were formed. Then, the carbon nanotubes were completely removed by high temperature oxidation and the nanorods were liberated from carbon nanotubes as a result. This study demonstrates that the carbon-coated anodic alumina film can be used as a template even under severe reaction conditions such as hydrothermal treatment.

Original languageEnglish
Pages (from-to)[225]/1-[229]/5
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Issue numberPART 2
Publication statusPublished - 2002
EventProceedings of the First International Symposium on Nanocarbons - Nagano, Japan
Duration: 2001 Nov 142001 Nov 16


  • Carbon nanotube
  • Hydrothermal synthesis
  • Nano-rod
  • Template synthesis
  • α-Fe O

ASJC Scopus subject areas

  • Condensed Matter Physics


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