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2003 Fiscal Year Final Research Report Summary

Syntheses of Novel Metallofullerene Nano-Peapods

Research Project

Project/Area Number 14204059
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical chemistry
Research InstitutionNagoya University

Principal Investigator

SHINOBARA Hisashi  Nagoya University, Chemistry Department, Professor, 大学院・理学研究科, 教授 (50132725)

Co-Investigator(Kenkyū-buntansha) SUGAI Toshiki  Nagoya University, Research Center for Materials Science, Research Associate, 物質科学国際研究センター, 助手 (50262845)
OKAZAKI Toshiya  Nagoya University, Chemistry Department, Research Associate, 大学院・理学研究科, 助手 (90314054)
Project Period (FY) 2002 – 2003
Keywordsfullerenes / matallofullerenes / carbon nanotubes / nano-peapods / STM / HRTEM / EELS / FET / device
Research Abstract

One of the fascinating features of metallofullerene-peapods (CNT encaging fullerenes) such as Gd@C_<82> peapods is that we can perform a 'local band gap engineering' at the site where a fullerene is endothermally inserted. Previous TEM images and electron energy loss spectra suggested that the metallofullerenes can be spaced regularly as close as 1.1 nm in a high-density 'peapod' structure, while 1.1-3 nm spacing was often observed in a low-density peapod. In the present Gd@C_<82> peapod samples, about 10% of over 200 SWNT images showed locally modified semiconducting band gaps.
Scanning tunneling microscopy and spectroscopy (dI/dY) give bias-dependent topographic images and local density of states (LDS) on carbon nanotubes near the fermi level. In the STS map, two strong VHS peaks corresponding to conduction and valence band edges are clearly seen with two smaller ones at higher bias voltages. The original band gap of 0.43 eV is narrowed down to 0.17 eV where the fullerene is expected to be located.
Furthermore, Gd@C_<82> peapods exhibit ambipolar FET behavior with both n-and p-channels easily accessible by simple electrostatic gates. Similar results were obtained from more than 10 independent devices composed of a small bundle of Gd@C_<82> peapods. Such ambipolar behavior has never been observed for C_<60> peapods.
TEM images and electron energy loss spectra suggested that the metallofullerenes can be spaced regularly as close as 1.1 nm in a high-density 'peapod' structure, while 1.1-3 nm spacing was often observed in a low-density peapod. In the present Gd@C_<82> peapod samples, about 10% of over 200 SWNT images showed locally modified semiconducting band gaps.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] A.N.Khlobystov: "Molecular Motion of Endohedral Metallofullerenes in Single-Walled Carbon Nanotubes"Angew.Chem.Int.. 43. 1386-1389 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Bandow: "Raman Scattering Study on Fullerene Derived Intermediates Formed within Single-Wall Carbon Nanotube : form Peapod to Double-Wall Carbon Nanotube"Chem.Phys.Lett.. 384. 320-325 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Sugai: "Syntheses of Single- and Double-Wall Carbon Nanotubes by the HTPAD and HFCVD Methods"New J.Phys.. 6. 21(1-12) (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Ohno: "Chirality Assignment of Individual Single-Walled Carbon Nanotubes in Carbon Nanotube Field-Effect Transistors by Micro-Photocurrent Spectroscopy"Appl.Phys.Lett.. 84. 1368-1370 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Shimada: "Transport Properties of C78,C90 and Dy@C82 Fullerenes-Nanopeapods by Field-Effect Transistors"Physica E. 1089-1092 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Shimada: "Double-Wall Carbon Nanotube Field-Effect Transistors : Ambilolar Transport Characteristics"Appl.Phys.Lett.. 84. 2412-2414 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 齋藤理一郎, 篠原久典: "カーボンナノチューブの基礎と応用"培風館. 320 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] E.Nishibori, Kiwata, M.Sakata, M.Takata, H.Tanaka, H.Kato, H.Shinohara: "Anomalous Endohedral Structure of Gd@C_<82> Metallofullerenes"Phys.Rev.B. 69. 113412-1-113412-4 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R.Kumashiro, K.Tanigaki, H.Ohashi, N.Tagmatarchis, H.Kato, H.Shinohara, T.Akasaka, K.Kato, S.Aoyagi, S.Kimura, M.Takata: "Azafullerene (C59N)2 Thin Film Field Effect Transistors"Appl.Phys.Lett.. 84. 2412-2414 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Shimada, T.Sugai, Y.Ohno, S.Kishimoto, T.Mizutani, H.Yoshida, T.Okazaki, H.Shinohara: "Double-Wall Carbon Nanotube Field-Effect Transistors : Ambilolar Transport Characteristics"Appl.Phys.Lett.. 84. 2154-2156 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Shimada, Y.Ohno, T.Okazaki, T.Sugai, K.Suenaga, S.Kishimoto, T.Mizutani, T.Inoue, R.Taniguchi, N.Fukui, H.Okubo, H.Shinohara: "Transport Properties of C_<78>, C_<90> and Dy@C_<82> Fullerenes-Nanopeapods by Field-Effect Transistors"Physica E. 21. 1089-1092 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Ohno, S.Kishimoto, T.Mizutani, T.Okazaki, H.Shinohara: "Chirality Assignment of Individual Single-Walled Carbon Nanotubes in Carbon Nanotube Field-Effect Transistors by Micro-Photocurrent Spectroscopy"Appl.Phys.Lett.. 84. 1368-1370 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taninaka, H.Kato, K.Shino, T.Sugai, Y.Terada, S.Heike, T.Hashizume H.Shinohara: "UHV-STM/STS Studies of Endohedral La-Metallofullerenes on Hydrogen Terminated Si(100)2x1"e-J.Surf.Sci.Nanotech.. 2. 89-92 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sugai, T.Okazaki, H.Yoshida, H.Shinohara: "Syntheses of Single-and Double-Wall Carbon Nanotubes by the HTPAD and HFCVD Methods"New J.Phys.. 6,21. 1-12 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Bandow, T.Hiraoka, Y.Yumura, K.Hirahara, H.Shinohara, S.Iijima: "Raman Scattering Study on Fullerene Derived Intermediates Formed within Single-Wall Carbon Nanotube : form Peapod to Double-Wall Carbon Nanotube"Chem.Phys.Lett.. 384. 320-325 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Suenaga, R.Taniguchi, T.Shimada, T.Okazaki, H.Shinohara, Sumio Iijima: "Evidence for the Intramolecular Motion of Gd Atoms in a Gd2@C_<92> Nanopeapod"Nano Letters. 3. 1395-1398 (2003)

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      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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