Summary of Research Project Results under JSPS FY2001
"Research for the Future Program"

1.Research Institution Nagoya University
2.Research Area Physical and Engineering Sciences
3.Research Field Advanced Processes
4.Term of Project FY 1997 〜 FY 2001
5.Project Number 97P00301
6.Title of Project Developments of Novel Carbon Nanomaterials

7.Project Leader
Name Institution,Department Title of Position
Hisanori, Shinohara Nagoya University, Graduate School of Science Professor

8.Core Members

Names Institution,Department Title of Position
Yohji, Achiba Tokyo Metropolitan University, Graduate School of Science Professor
Toshiki, Sugai Nagoya University, Reseach Center for Materials Science Research Associate
Toshiya, Okazaki Nagoya University, Graduate School of Science Research Associate

9.Summary of Research Results

 The current research project has dealt with the so-called nano-carbon materials such as fullerenes, endohedral metallofullerenes, carbon nanotubes and carbon peapods (nanotubes encapsulating various types of fullerenes). The main important results we obtained are the followings: 1. Synthesis of new types of endohedral metallofullerenes such as endohedral metallofullerenes encaging metal clusters and metal carbides. In particular, we have synthesized and purified the first metal-carbide endohedral metallofullerene, (Sc2C2)@C84; 2. Synthesis and characterization of brand new types of MRI contrast agents based on water-soluble Gd-endohedral metallofullerenes. In particular, we have found that water-soluble (Gd@C82)(OH)n metallofullerenes exhibit extremely high relaxibity (ca. 20 times higher) as compared with commercially available Gd-DTPA; 3. We developed a system to produce and separate/purify a gram quantity of endohedral metallofulllerenes; 4. Elucidation of growth mechanisms of fullerenes and single-wall carbon nanotubes (SWNT). We have successfully observed carbon clusters larger than C200 which should play a crucial role in the early stage of the SWNT growth; 5. Real time observation by high-speed video camera of the production and growth of fullerenes and SWNTs. We have found that the growth of fullerenes should be completed in 1 ms after laser ablation of target graphite rods ; 6. Selective production of diameter-controlled SWNTs based on the studies 4 and 5 above; 7. Electronic and structural studies of carbon clusters produced by the so-called laser-furnace technique by means of photodetachment laser spectroscopy.

10.Key Words

(1)fullerenes、(2)endohedral metallofullerenes、(3)carbon clusters
(4)carbon nanotubes、(5)hybrid nanotubes、(6)the CCVD method
(7)laser-furnace method、(8)MRI contrast agent、(9)growth mechanism