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Development of Novel Guest Phases Confined in Carbon Based Micropore Space and Their Properties

Research Project

Project/Area Number 08404048
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 機能・物性・材料
Research InstitutionTokyo Institute of Technology

Principal Investigator

ENOKI Toshiaki  Graduate Scholl of Decision Science, TOKYO INSTITUTE OF TECHNOLOGY, Professor, 大学院・理工学研究科, 教授 (10113424)

Co-Investigator(Kenkyū-buntansha) MIYAZAKI Akira  Graduate Scholl of Decision Science, TOKYO INSTITUTE OF TECHNOLOGY, Assistant, 大学院・理工学研究科, 助手 (40251607)
SATO Hirohiko  Graduate Scholl of Decision Science, TOKYO INSTITUTE OF TECHNOLOGY, Assistant, 大学院・理工学研究科, 助手 (90262261)
Project Period (FY) 1996 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥40,700,000 (Direct Cost: ¥40,700,000)
Fiscal Year 1999: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1998: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1997: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1996: ¥29,900,000 (Direct Cost: ¥29,900,000)
KeywordsNano-Graphite / Intercalation Compounds / Activated Carbon Fiber / Micropore / Spin Glass / マイクログラファイト / ナノサイズ電子系 / 欠陥構造 / 熱処理秩序化 / 化学吸着 / ダングリングボンド状態 / 共役π電子系 / 共約π電子系 / ランダム / 吸着 / ホスト・ゲスト系 / 炭素 / 磁化率 / 熱起電力 / 反強磁性
Research Abstract

(1) Nano-graphite derived by the heat-treatment of nano-diamond is investigated in relation to their structures, electronic structures and host-guest systems with potassium and bromine. From Raman spectra and X-ray diffraction, it is found that nano-diamond is converted to nano-graphite around 1600℃. Nano-graphite thus obtained has a novel electronic structure featured with non-bonding π-electron states of edge origin. The non-bonding edge states play an important role in the spin-lattice relaxation mechanism as fast relaxation centers at the edges. The spin-lattice relaxation process is decelerated in less graphitized particles prepared at lower temperatures around 1200℃, which can be explained by the presence of remnant spィイD13ィエD1 regions. Intercalation of potassium makes edge states less important in the electronic structure due to charge transfer from potassium to graphite. The presence of potassium works to enhance the spin-orbit interaction.
(2) The electronic properties of activated carbon fibers are investigated, which consist of disordered network of nano-graphite. Heat-treatment induces an insulator-to-metal transition around 1300℃, due to the development of infinite percolation path networks. In the insulating state, the charging effect works importantly in the electron hopping process, while the metallic state is featured with a considerable amount of disorder. In the vicinity of the insulator-to-metal transition, spin-glass-like disordered magnetism appears where spins of edge-inherited non-bonding states are interacting with the aid of π-conduction-electron mediated interaction. Physisorption of water molecules in micropores surrounding nano-graphite domains induces a reduction of the spin concentration. This can be explained in terms of the enhancement of inter-nano-graphite interaction induced by the effective pressure of introduced water molecules.

Report

(5 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (53 results)

All Other

All Publications (53 results)

  • [Publications] I. Matthews: "Localized Spins in Partially Carbonized Polyparaphenylene"Phys. Rev.. B60. 4749-4757 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Toshiaki Enoki: "Electronic and Magnetic Properties of Nano-Graphite"Proceedings of Applied Diamond Conference/Frontier Carbon Technology Joint Conference, Tsukuba. 213-218 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Toshiaki Enoki: "Host-Guest Systems in Microporous Carbons"Materials Research Society Proceedings, "Solid State Ionics". 1 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yoshiyuki Shibayama: "Disordered Magnetism at the Metal-Insulator Threshold in Nano-Graphite-Based Carbon Material"Phys. Rev. Letters. 84・8. 1744-1747 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohiko Sato: "Dimensional Crossover and Angular Dependent Magnetoresistance of Magnetic Graphite Intercalation Compounds; MC1_2 GIC'_s(M=Cu and Co)"J. Phys. Soc. Jpn.. 69(In press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yoshiyuki Shibayama: "Novel Electronic Properties of a Nano-Graphite Disordered Network and Their Iodine Doping Effects"J. Phys. Soc. Jpn.. 69(In press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] B. L. V. Prasad: "Nano-Graphites and Their Potassium Intercalated Compounds : Structural and Electronic Properties"Mol. Cryst. Liq. cryst. (In press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohiko Sato: "Anomalous Angular Dependence of Magnetoresistance in MCI_2-GIC's(M=Cu and Co)"Mol. Cryst. Liq. cryst. (In press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yoshiyuki Shibayama: "^<129>I Mossbauer Effect of Iodine Adsorbed in Activated Carbon Fibers"Mol. Cryst. Liq. cryst. (In press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Itsuko S. Suzuki: "Successive Magnetic Phase Transitions of Cu_cCo_<1-c>CI_2-FeCI_3 Graphite Intercalation Compounds"Mol. Cryst. Liq. Cryst. (In press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kazuyuki Takai: "Fluorine-Introduced sp^3-Carbon Sites in a Nano-Sized p-Electron System and Their Effects on the Electronic Properties"Mol. Cryst. Liq. Cryst. (In press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Toshiaki Enoki: "Nano-Graphite and its Intercelation Compounds"Proceedings of 4^<th> Biennial International Workshop in Russia, Fullerenes and Atomic Clusters, St. Petersburg. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] I. Matthews: "Located Spins in Partially Carbonized, Polyparaphenylene"Phys. Rev.. B60. 4749-4757 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Toshiaki Enoki: "Electronic and Magnetic Properties of Nano-Graphite"Proceedings of Applied Diamond Conference/Frontier Carbon Technology Joint Conference, Tsukuba. 213-218 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Toshiaki Enoki: "Host-Guest Systems in Microporous Carbons"Materials Research Society Proceedings, "Solid State Ionics". 1 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yoshiyuki Shibayama: "Disordered Magnetism at the Metal-Insulator Threshold in Nano-Graphite-Based Carbon Material"Phys. Rev. Letters. 84-8. 1744-1747 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohiko Sato: "Dimensional Crossover and Angular Dependent Magnetoresistance of mMagnetic Graphite Intercalation Compounds ; MC1ィイD22ィエD2GIC's (M=Cu and Co)"J. Phys. Soc. Jpn.. 69(in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yoshiyuki Shibayama: "Novel Electronic Properties of a Nano-Graphite Disordered Network and Their Iodine Doping Effects"J. Phys. Soc. Jpn.. 69(in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] B. L. V. Prasad: "Nano-Graphites and Their Potassium Intercalated Compounds : Structural and electronic Properties"Mol. Cryst. Liq. Cryst.. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hirohiko Sato: "Anomalous Angular Dependence of Magnetoresistance in MC1ィイD22ィエD2GIC's (M=Cu and Co)"Mol. Cryst. Liq. Cryst.. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yoshiyuki Shibayama: "ィイD1129IィエD1 Mossbauer Effect of Iodine Adsorbed in Activated Carbon Fibers"Mol. Cryst. Liq. Cryst.. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Itsuko S. Suzuki: "Successive Magnetic Phase Transitions of CuィイD2cィエD2CoィイD21-cィエD2ClィイD22ィエD2-FeClィイD23ィエD2 Graphite Intercalation Compounds"Mol. Cryst. Liq. Cryst.. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kazuyuki Takai: "Fluorine-Introduced sp-ィイD13ィエD1-Carbon Sites in a Nano-Sized p-Electron System and their Effects on the Electronic Properties"Mol. Cryst. Liq. Cryst.. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Toshiaki Enoki: "Nano-Graphite and its Intercalation Compounds"Mol. Cryst. Liq. Cryst.. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] l.Matthews: "Localized Spins in Partially Cabonized Polyparaphenylene"Phys. Rev.. B60. 4749-4757 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Toshiaki Enoki: "Electronic and Magnetic Properties of Nano-Graphite"Proceedings of Applied Diamond Conference/Frontier Carbon Technology Joint Conference,Tsukuba. 213-218 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Toshiaki Enoki: "Host-Guest Systems in Micorporous Carbons"Meterials Research Society Proceedings,"Solid State lonics". 1 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yoshiyuki Shibayama: "Disordered Magnetism at the Metal-lnsulator Threshold in Nano-Graphite-Based Carbon Material"Phys. Rev. Letters. 84・8. 1744-1747 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hirohiko Sato: "Dimensional Crossover and Angular Dependent Magnetoresistance of Magnetic Graphite lntercalation Compounds; MCl_2 GlC's(M=Cu and Co)"J. Phys. Soc. Jpn.. (ln press)69. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yoshiyuki Shibayama: "Novel Electronic Properties of a Nano-Graphite Disordered Network and Their lodine Doping Effects"J. Phys. Soc. Jpn. (ln press)69. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] B.L.V.Prasad: "Nano-Graphites and Their Potassium lntercalated Compounds: Structural and Electronic Properties"Mol. Cryst. Liq. Cryst. (ln press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hirohiko Sato: "Anomalous Angular Dependence of Magnetoresistance in MCl_2 GlC's (M=Cu and Co)"Mol. Cryst. Liq. Cryst. (ln press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yoshiyuki Shibayama: "l^<129> Mossbauer Effect of lodine Adsorbed in Activated Carbon Fibers"Mol. Cryst. Liq. Cryst. (ln press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] ltsuko S.Suzuki: "Successive Magnetic Phase Transitions of Cu_CCo_<1-C>Cl_2-FeCl_3 Graphite lntercalation Compoounds"Mol. Cryst. Liq. Cryst. (ln press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kazuyuki Takai: "Fluorine-lntroduced sp^3-Carbon Sites in a Nano-Sized p-Electron System and Their Effects on the Electronic Properties"Mol. Cryst. Liq. Cryst. (ln press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Toshiaki Enoki: "Nano-Graphite and its lnteracalation Compounds"Proceedings of 4^<th> Biennial lnternational Workshop in Russia, Fullerenes and Atomic Clusters, St. Petersburg. (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 榎敏明: "新しく炭素材料実験を始める人のために-炭素材料の化学と電子スピン共鳴" 炭素. 181. 44-46 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 榎敏明: "炭素同素体の電子物性と表面" ニューダイヤモンド. 50. 8-12 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tetsuo Yamashita: "The Contribution of Intercalate to the Electronic Structure and Transport Properties for Potassium-Oaygen-Graphite Intercalation Compounds" Mol.Cryst.Liq.Cryst. 310. 243-248 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] odd.E.Andersson: "The c-anis Magnetoregistance and Thermoelectric Pwoer of Cu Cl_2 Graphite Intercalation Compounds" Mol.Cryst.Liq.Cryst. 310. 249-254 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yoshiyuki Shibayama: "Magnetic Properties of Activated Carbon Fibers and Their Iodine doping Effect" Mol.Cryst.Liq.Cryst. 310. 273-278 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Norikazu Kobayashi: "Gas Adsorption Effects on Structural and Electrical Properties of Activated Carbon Fibers" J.Chem.Phys. 109(5). 1983-1990 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] odd.E.Andersson: "The Structure and Electronic Properties of Graphite Nano-particles" Phys.Rev.B. 58(24). 16387-16395 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Toshiaki Enoki: "Thermal and Mechanical Properties" Springer-verlag, 225-240 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Toshiaki Enoki: "Novel Carbon-Based ttost-Euest Systems" Springer-verlag, 137-146 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] N. Kobayashi et al.: "Magnetic properties of absorbed oxygen in microporous carbon" Mol. Cryst. Liq. Cryst.306. 103-110 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y. Shibayama et al.: "Magnetic Properties of Activated Carbon Fibers and Their Iodine-Doping Effect" Mol. Cryst. Liq. Cryst.(in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Nakayama 他: "Electronic and Magnetic Properties of Activated Carbon Fibers" Bull.Chem.Soc.Jpn.69(2). 333-339 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Enoki 他: "Novel Forms of Light Element Guests in Micropores of Graphitic Systems:Structures,Electronic States and Magnetism" J.Phys.Chem.Solids. 57(6-8). 663-669 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Yamashita 他: "Electronic Structure and Physical Properties of Potassium-Oxygen-Graphite Intercalation Compounds" J.Phys.Chem.Solids. 57(6-8). 765-769 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Ogata 他: "NMR Study of Sodium-Hydrogen-Graphite Ternary Intercalation Compound" J.Phys.Chem.Solids. 57(6-8). 703-709 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] J.Matthews 他: "ESR of Polyparaphenylene-Based Carbons" Appl.Phys.Lett.69(14). 2042-2044 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Yamashita 他: "Galvanomagnetic,Optical Properties and Ultraviolet Photoelectron Spectra of Potassium-Oxygen-Graphite Intercalation Commpounds" J.Phys.Soc.Jpn.66(1). 158-168 (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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