2001 Fiscal Year Annual Research Report

カーボンナノチューブの微細技術への応用と共鳴ラマン分光

Research Project

Project/Area Number	13440091
Research Institution	The University of Electro-Communications
Principal Investigator	斉藤理一郎電気通信大学, 電気通信学部, 助教授 (00178518)
Keywords	カーボンナノチューブ / 共鳴ラマン効果 / 二重共鳴ラマン分光 / グラファイト / 0.4nmナノチューブ / G-band / D-band
Research Abstract	単一のカーボンナノチューブの共鳴ラマン効果について多くの理論的及び実験的知見を得た。 (1)G-bandのラマン周波数の半径依存性と螺旋度依存性の理論と実験結果をそれぞれPhys. Rev. Bに発表した・G-bandの周波数が半径の逆2乗に比例し、これは形状の変化ではなく、グラファイトのフォノン分散関係によるものであることを示した。 (2)D-bandのラマン周波数が、電子状態のvan Hove特異性と関係があることを突き止め、ほぼ同じ半径のナノチューブの螺旋度依存性の理論と実験をPhys.Rev.Bに発表した。具体的には、1次元のvan Hove特異性を与える、エネルギー分散の平らなところの波数に相当するフォノンの周波数がD-bandのラマン周波数になっていることを見いだした。 (3)0.4nmのナノチューブの光吸収とRaman強度の関係について、Phys.Rev.LettとPhys.Rev.Bに発表した。0.4nmの半径だと、ゾーンの折り込みによる1次元の電子状態の手法が使えないので、第一原理計算によって状態密度を求め、光吸収スペクトルと共鳴Raman強度の条件を見いだした。 (4)D-bandが、二重共鳴ラマン効果に因ることを見いだし、そこから、グラファイトに関連する物質に共通して見られる微弱な分散のある多くのラマン周波数の同定がすべてできることを示した。さらにフォノン分散関係を再現する力の定数を再び求めた。これらはphys.Rev.Lettとphys.Rev.Bに発表した。

Research Products

(14 results)

All Other

All Publications (14 results)

[Publications] A. Jorio, et al.: "Structural (n, m) determination of isolated single wall carbon nanotubes by resonant Raman scattering"Phys. Rev. Lett.. 86. 1118-1121 (2001)
[Publications] S.D.M.Brown, et al.: "Origin of the Breit-Wigner-Fano line shape of the tangential G-band feature of metallic carbon nanotubes"Phys. Rev. B. 63. 155414-1-155414-8 (2001)
[Publications] M.A.Pimenta, et al.: "Diameter dependence of the Raman D-band in isolated single-wall carbon nanotubes"Phys. Rev. B. 63. 041401-1-041401-4 (2001)
[Publications] A.G.Souza Filho et al.: "Electronic Transition Energy E_<ii> for an Isolated (n, m) Single-Wall Carbon Nanotube Obtained by anti-Stokes/Stokes Resonant Raman Intensity Ratio"Phys. Rev. B. 63. 241404-1-241404-4 (2001)
[Publications] A.Jorio et al.: "Joint density of electronic states for one isolated single wall carbon nanotube studied by resonant Raman scattering"Phys. Rev. B. 63. 245416-1-245416-4 (2001)
[Publications] T.Kimura et al.: "Study of the radiative and nonradiative processes of rare earth implanted semiconductors at low temperatures"Nucl. Instr. and Meth. in Phys. Res. B. 175-177. 286-291 (2001)
[Publications] R.Saito, et al.: "Chirality Dependent G-band Raman Intensity of Carbon Nanotubes"Phys. Rev. B. 64. 085312-1-085312-7 (2001)
[Publications] Z.M.Li, et al.: "Polarized Absorption Spectra of Single-Walled 4Å Carbon Nanotubs aligned in Channels of AIPO_4-5 Single Crystal"Phys. Rev. Lett.. 87. 127401-1-127401-4 (2001)
[Publications] R.Saito, et al.: "Bias Pre-Treatment in the Plasma Chemical Vapor Deposition of Diamond"J. Appl. Phys.. 90. 2559-2564 (2001)
[Publications] R. Saito, et al.: "Anomalous Potential Barrier of Double-Wall Carbon Nanotube"Chem. Phys. Lett.. 348. 187-193 (2001)
[Publications] S. Roche, R. Saito: "Magnetoresistance fingerprints in carbon nanotubs: Role of chemical potential and orientation of the magneticx filed"Phys. Rev. Lett.. 87. 246803-1-246803-4 (2001)
[Publications] R. Saito, et al.: "Probing phonon dispersion relations of graphite by double resonance Raman scattering"Phys. Rev. Lett.. 88. 027401-1-017401-4 (2002)
[Publications] A.G.Souza Filho, et al.: "Effect of quantized electronic states on the dispersive Raman features in individual single wall carbon nanotubes"Phys. Rev. B. 65. 035404-1-035404-6 (2001)
[Publications] R.Saito et al.: "Optical properties and Raman Spectroscopy of carbon Nanotuves in "Carbon Nanotubes""Springer-Verlag, Berlin. 34 (2001)

2001 Fiscal Year Annual Research Report

カーボンナノチューブの微細技術への応用と共鳴ラマン分光

Principal Investigator

斉藤 理一郎 電気通信大学, 電気通信学部, 助教授 (00178518)

Research Products

[Publications] A. Jorio, et al.: "Structural (n, m) determination of isolated single wall carbon nanotubes by resonant Raman scattering"Phys. Rev. Lett.. 86. 1118-1121 (2001)

[Publications] S.D.M.Brown, et al.: "Origin of the Breit-Wigner-Fano line shape of the tangential G-band feature of metallic carbon nanotubes"Phys. Rev. B. 63. 155414-1-155414-8 (2001)

[Publications] M.A.Pimenta, et al.: "Diameter dependence of the Raman D-band in isolated single-wall carbon nanotubes"Phys. Rev. B. 63. 041401-1-041401-4 (2001)

[Publications] A.G.Souza Filho et al.: "Electronic Transition Energy E_<ii> for an Isolated (n, m) Single-Wall Carbon Nanotube Obtained by anti-Stokes/Stokes Resonant Raman Intensity Ratio"Phys. Rev. B. 63. 241404-1-241404-4 (2001)

[Publications] A.Jorio et al.: "Joint density of electronic states for one isolated single wall carbon nanotube studied by resonant Raman scattering"Phys. Rev. B. 63. 245416-1-245416-4 (2001)

[Publications] T.Kimura et al.: "Study of the radiative and nonradiative processes of rare earth implanted semiconductors at low temperatures"Nucl. Instr. and Meth. in Phys. Res. B. 175-177. 286-291 (2001)

[Publications] R.Saito, et al.: "Chirality Dependent G-band Raman Intensity of Carbon Nanotubes"Phys. Rev. B. 64. 085312-1-085312-7 (2001)

[Publications] Z.M.Li, et al.: "Polarized Absorption Spectra of Single-Walled 4Å Carbon Nanotubs aligned in Channels of AIPO_4-5 Single Crystal"Phys. Rev. Lett.. 87. 127401-1-127401-4 (2001)

[Publications] R.Saito, et al.: "Bias Pre-Treatment in the Plasma Chemical Vapor Deposition of Diamond"J. Appl. Phys.. 90. 2559-2564 (2001)

[Publications] R. Saito, et al.: "Anomalous Potential Barrier of Double-Wall Carbon Nanotube"Chem. Phys. Lett.. 348. 187-193 (2001)

[Publications] S. Roche, R. Saito: "Magnetoresistance fingerprints in carbon nanotubs: Role of chemical potential and orientation of the magneticx filed"Phys. Rev. Lett.. 87. 246803-1-246803-4 (2001)

[Publications] R. Saito, et al.: "Probing phonon dispersion relations of graphite by double resonance Raman scattering"Phys. Rev. Lett.. 88. 027401-1-017401-4 (2002)

[Publications] A.G.Souza Filho, et al.: "Effect of quantized electronic states on the dispersive Raman features in individual single wall carbon nanotubes"Phys. Rev. B. 65. 035404-1-035404-6 (2001)

[Publications] R.Saito et al.: "Optical properties and Raman Spectroscopy of carbon Nanotuves in "Carbon Nanotubes""Springer-Verlag, Berlin. 34 (2001)

斉藤理一郎電気通信大学, 電気通信学部, 助教授 (00178518)