2001 Fiscal Year Annual Research Report

磁性金属を内包した単層ナノチューブの単分子物性

Research Project

Project/Area Number	13304026
Research Institution	Tokyo Metropolitan University
Principal Investigator	片浦弘道東京都立大学, 理学研究科, 助手 (30194757)
Co-Investigator(Kenkyū-buntansha)	塚越一仁理化学研究所, 半導体工学研究室, 研究員 (50322665) 兒玉健東京都立大学, 理学研究科, 助手 (20285092) 鈴木信三東京都立大学, 理学研究科, 助手 (10226516) 藤原明比古北陸先端科学技術大学院大学, 材料科学研究科, 助教授 (70272458) 吉岡英生奈良女子大学, 理学部, 助教授 (40252225)
Keywords	カーボンナノチューブ / 内包ナノチューブ / 単分子物性 / ピーポッド / フラーレン / 電気伝導 / 磁気効果 / ラマン散乱
Research Abstract	単分子物性測定を実現するために,まず走査型近接場顕微鏡を導入した.レーザー入射光学系を整備し,可視から赤外までの各種レーザーをファイバープローブに導入可能にした.また,制御用半導体レーザーからの迷光を避けるため,光検出部にノッチフィルターを導入し,785nm付近以外の全ての波長域で測定が可能となった. 一方,単層カーボンナノチューブの合成法を改良し,初期純度を約80%まで上昇させることに成功した.また,酸を使わない高純度精製法を確立するとともに,ナノチューブへの穴あけ,穴閉じの手法を開発し,内包ナノチューブの収率を向上させた.特にC70内包系では,C70の内包に最適な直径分布をもつナノチューブを用いることにより,極めて高い充填率の試料を得ることができた.X線回折では,充填率がほぼ100%であることが示された. これら高収率のフラーレン内包チューブを真空中加熱することにより,2層のナノチューブを合成することに成功した.これまでに報告されているものと異なり,外側のチューブの直径分布が1.4nmを中心に細く狭いために,内側も細く狭くなり,X線回折から,直径が0.6から0.7nmのチューブが生成されていることがわかった.この試料の共鳴ラマン散乱を測定すると,G'バンドに2本の異なる振動数のモードが観測され,異なる2種類の直径のチューブが存在することが確認され,それぞれが異なった共鳴効果を示すことから,内部のチューブも通常のチューブと同様な量子効果があることがわかった. 一方,カーボンナノチューブの電気伝導特性における磁場効果を詳細に調べて単電子効果に重畳して「ナノチューブのenergy dispersionの磁気効果」が観測できることを見出した。これによってナノチューブ内の電子状態を電気的に観測することが可能となることを明らかにした。

Research Products
(31 results)

All Other

All Publications (31 results)

[Publications] H.Kataura et al.: "Optical Properties of Fullerene-and Non-fullerene-peapods"Appi. Phys. A.. (印刷中).
[Publications] X.Liu et al.: "Filling factors, structural, and electronic properties of C_<60> molecules in single-wall carbon nanotubes"Phys. Rev. B. 65. 045419-1-045419-6 (2002)
[Publications] T.Pichler et al.: "Metallic polymers of C60 inside single wall carbon nanotubes"Phys. Rev. Lett.. 87. 267401-1-267401-4 (2001)
[Publications] H.Kuzmany et al.: "Determination of SWCNT diameters from the Raman response of the radial breathing mode"Eur. Phys. J. B. 22. 307-320 (2001)
[Publications] M.Yudasaka et al.: "Diameter Enlargement of HiPco Single-Wall Carbon Nanotubes by Heat Treatment"Nano letters. 1. 487-489 (2001)
[Publications] S.Kazaoui et al.: "Electrochemical tuning of electronic states in single-wall carbon nanotubes studied by in situ absorption spectroscopy and ac resistance"Appl. Phys. Lett.. 78. 3433-3435 (2001)
[Publications] R.Sen et al.: "Growth of single-walled carbon nanotubes from the condensed phase"Chem. Phys. Lett.. 349(5,6). 383-388 (2001)
[Publications] S.Suzuki et al.: "Time and space evolution of carbon species generated with a laser furnace technique"AIP Conference Proceedings. 590. 51-54 (2001)
[Publications] S.Suzuki et al.: "Time evolution of emission by carbon nanoparticles generated with a laser furnace technique"Eur. Phys. J. D. 16(1-3). 369-372 (2001)
[Publications] Takeshi Kodama: "Spectroscopic Studies of Endohedral Metallofullerenes"New diamond and Frontier Carbon Technology. 11. 367-373 (2001)
[Publications] Takeshi Kodama: "Structural Study of Three Isomers of Tm@C_<82> by ^<13>C-NMR Spectroscopy"Journal of the American Chemical Society. 124. 1452-1455 (2002)
[Publications] K.Tsukagoshi, N.Yoneya, S.Uryu, Y.Aoyagi, A.Kanda, Y.Ootuka: "Carbon nanotube devices for nanoelectronics"Physica B. (印刷中).
[Publications] A.Kanda, K.Tsukagoshi, Y.Ootuka, Y.Aoyagi: "Electric transport in multiwall carbon nanotubes"Physica B. (印刷中).
[Publications] A.Kanda, K.Tsukagoshi, S.Uryu, Y.Ootuka, Y.Aoyagi: "Carbon nanotube bundle effect in single electron tunneling transistor"Microelectronic Engineering. (印刷中).
[Publications] R.Sen et al.: "Encapsulated and hollow closed-cage structures of WS2 and MoS2 prepared by laser ablation at 450-1050C"Chem. Phys. Lett. 340(2001) pp. 242-248. 340. 242-248 (2001)
[Publications] K.Suenaga et al.: "Electron energy-loss spectroscopy of electron states in isolated carbon nanostructures"Phys. Rev. B. 63. 165408-165411 (2001)
[Publications] R.Jacquemin et al.: "Doping mechanism in single-wall carbon nanotubes studied by optical absorption"Synth. Metals. 116. 405-409 (2001)
[Publications] Y.Iwasa et al.: "Phase stability of doped carbon nanotubes"Syn. Met.. 121. 1203-1204 (2001)
[Publications] H.Yoshioka: "Two kinds of metallic states in carbon nanotubes --Differences in transport properties --"Journal of Physics and Chemistry of Solids. 62. 413-417 (2001)
[Publications] H.Yoshioka, M.Tsuchiizu, Y.Suzumura: "Commensurability in one-dimensional electron systems at quarter-filling"Journal of Physics and Chemistry of Solids. 62. 419-422 (2001)
[Publications] H.Yoshioka, M.Tsuchiizu, Y.Suzumura: "Effects of Next-Nearest-Neighbor Repulsion on One-Dimensional Quarter-Filled Electron Systems"Journal of the Physical Society of Japan. 70. 762-773 (2001)
[Publications] M Tsuchiizu, H Yoshioka, Y. Suzumura: "Crossover from Quarter-Filling to Half-Filling in a One-Dimensional Electron System with a Dimerized and Quarter-Filled Band"Journal of the Physical Society of Japan. 70. 1460-1463 (2001)
[Publications] H.Yoshioka: "NMR relaxation rate in metallic carbon nanotunes"Journal of Physics and Chemistry of Solids. (印刷中).
[Publications] H.Yoshioka, M.Tsuchiizu, Y.Suzumura: "Commensurate-incommensurate transition in a one-dimensional dimerized electron system close to quarter-filling"Synthetic Metals. (印刷中).
[Publications] 藤原明比古: "カーボンナノチューブのガス吸蔵"機能材料. 21巻5号. 49-53 (2001)
[Publications] A.Fujiwara: "Magnetotransport of carbon nanotubes : magnetic-field-induced metal-insulator transition"Physica. B298. 541-545 (2001)
[Publications] Y.Maniwa: "Multiwalled carbon nanotubes grown in hydrogen atmosphere : An x-ray diffraction study"Phys. Rev.. B64. 073105-1-073105-4 (2001)
[Publications] A.Fujiwara: "Photoconductivity in Semiconducting Single-Walled Carbon Nanotubes"Jpn. J. Appl. Phys.. 40. L1229-L1231 (2001)
[Publications] Y.Maniwa: "Thermal Expansion of Single Wall Carbon Nanotube Bundles : X-Ray Diffraction Studies"Phys. Rev.. B64. 241402-1-241402-3 (2001)
[Publications] A.Fujiwara: "Local current density detection of individual single-wall carbon nanotubes in a bundle"Appl. Phys. Lett.. 80(印刷中). (2002)
[Publications] 藤原明比古: "カーボンナノチューブ-期待される材料開発-(第8章)"株式会社シーエムシー. 105(45-49) (2001)

2001 Fiscal Year Annual Research Report

磁性金属を内包した単層ナノチューブの単分子物性

Principal Investigator

片浦 弘道 東京都立大学, 理学研究科, 助手 (30194757)

Research Products

[Publications] H.Kataura et al.: "Optical Properties of Fullerene-and Non-fullerene-peapods"Appi. Phys. A.. (印刷中).

[Publications] X.Liu et al.: "Filling factors, structural, and electronic properties of C_<60> molecules in single-wall carbon nanotubes"Phys. Rev. B. 65. 045419-1-045419-6 (2002)

[Publications] T.Pichler et al.: "Metallic polymers of C60 inside single wall carbon nanotubes"Phys. Rev. Lett.. 87. 267401-1-267401-4 (2001)

[Publications] H.Kuzmany et al.: "Determination of SWCNT diameters from the Raman response of the radial breathing mode"Eur. Phys. J. B. 22. 307-320 (2001)

[Publications] M.Yudasaka et al.: "Diameter Enlargement of HiPco Single-Wall Carbon Nanotubes by Heat Treatment"Nano letters. 1. 487-489 (2001)

[Publications] S.Kazaoui et al.: "Electrochemical tuning of electronic states in single-wall carbon nanotubes studied by in situ absorption spectroscopy and ac resistance"Appl. Phys. Lett.. 78. 3433-3435 (2001)

[Publications] R.Sen et al.: "Growth of single-walled carbon nanotubes from the condensed phase"Chem. Phys. Lett.. 349(5,6). 383-388 (2001)

[Publications] S.Suzuki et al.: "Time and space evolution of carbon species generated with a laser furnace technique"AIP Conference Proceedings. 590. 51-54 (2001)

[Publications] S.Suzuki et al.: "Time evolution of emission by carbon nanoparticles generated with a laser furnace technique"Eur. Phys. J. D. 16(1-3). 369-372 (2001)

[Publications] Takeshi Kodama: "Spectroscopic Studies of Endohedral Metallofullerenes"New diamond and Frontier Carbon Technology. 11. 367-373 (2001)

[Publications] Takeshi Kodama: "Structural Study of Three Isomers of Tm@C_<82> by ^<13>C-NMR Spectroscopy"Journal of the American Chemical Society. 124. 1452-1455 (2002)

[Publications] K.Tsukagoshi, N.Yoneya, S.Uryu, Y.Aoyagi, A.Kanda, Y.Ootuka: "Carbon nanotube devices for nanoelectronics"Physica B. (印刷中).

[Publications] A.Kanda, K.Tsukagoshi, Y.Ootuka, Y.Aoyagi: "Electric transport in multiwall carbon nanotubes"Physica B. (印刷中).

[Publications] A.Kanda, K.Tsukagoshi, S.Uryu, Y.Ootuka, Y.Aoyagi: "Carbon nanotube bundle effect in single electron tunneling transistor"Microelectronic Engineering. (印刷中).

[Publications] R.Sen et al.: "Encapsulated and hollow closed-cage structures of WS2 and MoS2 prepared by laser ablation at 450-1050C"Chem. Phys. Lett. 340(2001) pp. 242-248. 340. 242-248 (2001)

[Publications] K.Suenaga et al.: "Electron energy-loss spectroscopy of electron states in isolated carbon nanostructures"Phys. Rev. B. 63. 165408-165411 (2001)

[Publications] R.Jacquemin et al.: "Doping mechanism in single-wall carbon nanotubes studied by optical absorption"Synth. Metals. 116. 405-409 (2001)

[Publications] Y.Iwasa et al.: "Phase stability of doped carbon nanotubes"Syn. Met.. 121. 1203-1204 (2001)

[Publications] H.Yoshioka: "Two kinds of metallic states in carbon nanotubes --Differences in transport properties --"Journal of Physics and Chemistry of Solids. 62. 413-417 (2001)

[Publications] H.Yoshioka, M.Tsuchiizu, Y.Suzumura: "Commensurability in one-dimensional electron systems at quarter-filling"Journal of Physics and Chemistry of Solids. 62. 419-422 (2001)

[Publications] H.Yoshioka, M.Tsuchiizu, Y.Suzumura: "Effects of Next-Nearest-Neighbor Repulsion on One-Dimensional Quarter-Filled Electron Systems"Journal of the Physical Society of Japan. 70. 762-773 (2001)

[Publications] M Tsuchiizu, H Yoshioka, Y. Suzumura: "Crossover from Quarter-Filling to Half-Filling in a One-Dimensional Electron System with a Dimerized and Quarter-Filled Band"Journal of the Physical Society of Japan. 70. 1460-1463 (2001)

[Publications] H.Yoshioka: "NMR relaxation rate in metallic carbon nanotunes"Journal of Physics and Chemistry of Solids. (印刷中).

[Publications] H.Yoshioka, M.Tsuchiizu, Y.Suzumura: "Commensurate-incommensurate transition in a one-dimensional dimerized electron system close to quarter-filling"Synthetic Metals. (印刷中).

[Publications] 藤原明比古: "カーボンナノチューブのガス吸蔵"機能材料. 21巻5号. 49-53 (2001)

[Publications] A.Fujiwara: "Magnetotransport of carbon nanotubes : magnetic-field-induced metal-insulator transition"Physica. B298. 541-545 (2001)

[Publications] Y.Maniwa: "Multiwalled carbon nanotubes grown in hydrogen atmosphere : An x-ray diffraction study"Phys. Rev.. B64. 073105-1-073105-4 (2001)

[Publications] A.Fujiwara: "Photoconductivity in Semiconducting Single-Walled Carbon Nanotubes"Jpn. J. Appl. Phys.. 40. L1229-L1231 (2001)

[Publications] Y.Maniwa: "Thermal Expansion of Single Wall Carbon Nanotube Bundles : X-Ray Diffraction Studies"Phys. Rev.. B64. 241402-1-241402-3 (2001)

[Publications] A.Fujiwara: "Local current density detection of individual single-wall carbon nanotubes in a bundle"Appl. Phys. Lett.. 80(印刷中). (2002)

[Publications] 藤原明比古: "カーボンナノチューブ-期待される材料開発-(第8章)"株式会社シーエムシー. 105(45-49) (2001)

片浦弘道東京都立大学, 理学研究科, 助手 (30194757)