Hidden caves in an aggregate of single-wall carbon nanohorns found by using gd2o3 probes

Ryota Yuge, Toshinari Ichihashi, Jin Miyawaki, Tsutomu Yoshitake, Sumio Iijima, Masako Yudasaka

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21 Citations (Scopus)


We investigated the inner structure of an aggregate made of single-wall carbon nanohorns (SWNHs). This structure has not been clarified because the thousands of SWNHs are densely packed and difficult to observe directly by electron microscopy. We used Gd2O3 as a probe for the electron microscope observation: Gd2O3 was confined inside SWNH via the incorporation of Gd acetate inside SWNHs with holes opened (NHox), followed by heat treatment at 1200 °C in Ar gas. From microscopic study, we found that Gd2O3 formed clumped crystals with sizes of 7-21 nm around the center of the SWNH aggregates, suggesting that there were 10-20-nm caves near the aggregate's center.

Original languageEnglish
Pages (from-to)2741-2744
Number of pages4
JournalJournal of Physical Chemistry C
Issue number7
Publication statusPublished - Feb 19 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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