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1998 Fiscal Year Final Research Report Summary

ELECTRONIC STATES AT SURFACES : HREELS-STM STUDY

Research Project

Project/Area Number 08454072
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅰ(光物性・半導体・誘電体)
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

SUTO Shozo  TOHOKU UNIVERSITY,GRADUATE SCHOOL OF SCIENCE,ASSOCIATE PROFESSOR, 大学院・理学研究科, 助教授 (40171277)

Co-Investigator(Kenkyū-buntansha) SAKAMOTO Kazuyuki  TOHOKU UNIVERSITY,GRADUATE SCHOOL OF SCIENCE,RESEARCH PHYSICIST, 大学院・理学研究科, 助手 (70261542)
UCHIDA Wakio  TOHOKU UNIVERSITY,GRADUATE SCHOOL OF SCIENCE,PROFESSOR, 大学院・理学研究科, 教授 (50005790)
Project Period (FY) 1996 – 1998
KeywordsCARBON 60 / BONDING ORBITAL / HIGH-RESOLUTION ELECTRON-ENERGY-LOSS SPECTROSCOPY / SCANNING TUNNELING MICROSCOPY / PHOTO-ELECTRON SPECTROSCOPY / Si (111) 7x7 / Si (100) 2x1 / CHARGE TRANSFER
Research Abstract

(1) We have investigated the structures, vibrational excitation spectra, valence band spectra and C is core level spectra of C60 molecules adsorbed on Si(111)7x7 and Si(100)2x1 surfaces, using a combined measurement of high-resolution electron-energy-loss spectroscopy (HREELS) and scanning tunneling microscopy (STM), HREELS-STM, and a photoelectron spectroscopy (PES). At a coverage between 1 ML and 0.25 ML, HREELS and PES measurements show that the interaction is as weak as the van der Waals interaction on both surfaces. At a coverage lower than 0.25 ML, some contradictory results are obtained by HREELS and PES.With HREELS, the softening of several vibrational modes is observed on the Si(111)7x7 surface, but no indication of softening is observed on the Si(100)2x1 surface. The charge transfer scheme explains the softening well. These results by HIREELS indicate that the nature of the bonding is ionic on the Si(111)7x7 surface and of the van der Waals type on the Si(100)2x1 surface. On the contrary, the bonding states between C60 molecules and Si substrates are clearly observed at 2.4 eV on both surfaces with PES.The PES measurements indicate that the interaction has a covalent character at the Si(111)7x7 surface, and that the nature is in between covalent and ionic characters, i.e. not pure ionic or covalent limit, at the Si(100)2x1 surface. We have discussed the nature of the interaction manifested by PES and HREELS-STM measurements in comparison with the spectra of C60 molecules adsorbed on metal surfaces.
(2) We have also investigated the initial growth of silicon carbide film by C60 precursor.
(3) We have discussed the applicability and possibility of a combined measurement system of HREELS-STM.

  • Research Products

    (50 results)

All Other

All Publications (50 results)

  • [Publications] S.Suto et.al.: "Vibrational Properties and Structure of C_<60> Thin Films on Si(III) and Greplie Surfaces" Surface Review and Letters. 3. 927-932 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.-W.Hu: "Absorption and Reaction of C_<60> on Si(III) Surface" Surface Review and Letters. 3. 933-936 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.-W.Hu: "Surface Structure of 3C-SiC(III) Feabricated by C_<60> Precursor" J.Vac.Sci.Technol.B14. 938-942 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.-W.Hu: "Surface Structure of 3C-Sic (III) Grown on Si (III) Surface by C_<60> Precuusor" Applied Physics Letters. 68. 1253-1255 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto et.al.: "Molecular Precursor of Oxygen on Si(III)7×7 Surface" Surface Science. 357/358. 514-517 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Kasuya et al.: "Fabrication and Modification of Microcluster Lattice System" Proc.of the Science and Technology of Atomically Engineered Materials. 77-83 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Suto et al.: "Initial Stage of C_<60> Film Growth and Reaction on Si(III) 7×7 and Graphite Surfaces Studied by HREELS-STM" Thin Solid Films. 281/282. 602-605 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Suto et al.: "Local Structure and Chemical Reaction of C_<60> Films on Si(III) 7×7 Studiod by HREELS-STM" Materials Science and Engineering. A217/218. 34-37 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto et. al.: "SiC Film Formation from C_<60> Monolayer on Si(III)7×7 and Si(100)2×1 Surfaces Studied by HREELS-STM" Applied Surface Science. 121/122. 200-203 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto et al.: "The Quality of Sic Film Formed by Thermal Reaction of C_<60> Monolayer on Si(III)-(7×7) Surface." Sci.Rep.RITU. A44. 55-58 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Suto et al: "Uibrational Properties and Charge Transfer of C_<60> Adsnrbed on Si(III)-(7×7) and Si(100)-(2×1) Surfaces" Physical Reuiew. B56. 7439-7445 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Matsumoto et al.: "The Growth Mechanism of (-Cu-o-) Stnings on Ag(110) studied by STM, XPS and HREELS" Journal of Chenical Physics. 107. 10185-10190 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Suto et al.: "Interaction of C_<60> with Silicon Dangling Bonds on the Si(III)-(7×7) Surface" Surface Science. 402-404. 523-528 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto et al.: "SiC Islands Grown on Si(III)-(7×7) and Si(100)-(2×1) Surfaces by C_<60> Precuvsor" J.Electron Spectrosc.Relat.Phonom.88-91. 897-903 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto et al.: "Formation and Growth by the Thermal Reaction of a C_<60> Film Adsorbed on a Si(III)7×7 Surface" Physical Review. B57. 9003-9014 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Kasuya et al.: "Chemical Reactions and Electronic Functions of Carbon Cluster Arrays Studied by STM and HREELS" Acta Physica Polonica. A93. 317-322 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Kondo et al.: "Change in Electronic Structure of C_<60> Molecules Adsorhed on S(001)-(2×1) Surface" Japanese Journal of Applied Physics. 印刷中.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto: "Thermal-Depen dent Electronic Structure at the Interface of C_<60> Adsorbed Si(III)-(7×7) Surface" Surface Science. 印刷中.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto et al.: "Bonding State of the C_<60> Molecule Adsorbed on a Si(III)-(7×7) surface" Physical Review. B58. 13951-13956 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Suto et al.: "Bonding Nature of C_<60> Adsorbed on Si(III)-(7×7) and Si(100)-(2×1) Surfaces Studied by HREELS and PES" Surface Science. 印刷中. (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Suto et al.: "Interaction of C_<60> with Si(III)-(7×7) and Si(100)-(2×1) Surfaces Studied by STM,PES and HREELS : Annealing Ettect" Surface Science. 印刷中. (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Wakita et al.: "Adsorption and Thermal Reaction of C_<70> on Si(III)-(7×7) and Si(100)-(2×1) Surfaces : Compamison with C_<60>" Applied Surface Science. 印刷中. (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto et al.: "Thermal Induced Transition in Bonding Nature of C_<60> Molocules Adsorbed on a S(III)-(7×7) Surface" Journal of Electron Spectroscopy and Related Phenomena. 印刷中. (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sakamoto et al.: "Electronic Structures of C_<60> Adsorbed on Si(III)-(7×7) and Si(III)-(2×1) Surfaces" Surface Science. 印刷中. (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Arai et al.: "Clusters and Mesoscopic Materials" Springer and Kodansha-Scientific, 453 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Suto, A.Kasuya, C.-W.Hu, A.Wawro, T.Goto and Y.Nishina: "Vibrational Properties and Structure of C_<60> Thin Films on Si (111) and Graphite Surfaces" Surf.Rev.Lett.3. 927-932 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.-W.Hu, A.Kasuya, S.Suto, A.Wawro and Y.Nishina: "Absorption and Reaction of C_<60> on Si (111) Surface : A Combined Study by HREELS and STM" Surf.Rev.Lett.3. 933-936 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.-W.Hu, A.Kasuya, S.Suto, A.Wawro and Y.Nishina: "Surface Structure of 3C-SiC (111) Fabricated by C_<60> Precursor : A Scanning Tunneling Microscopy and High Resolution Electron Energy Loss Spectroscopy Study" J.Vac.Sci.Technol.B14. 938-942 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.-W.Hu, A.Kasuya, S.Suto, A.Wawro and Y.Nishina: "Surface Structure of 3C-SiC (111) Grown on Si (111) Surface by C_<60> Precursor" Appl.Phys.Lett.68. 1253-1255 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, S.Suto and W.Uchida: "Molecular Precursor of Oxygen on Si (111) 7x7 Surface" Surface Science. 357/358. 514-517 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Kasuya, C.-W.Hu, R.Czaika, S.Suto and Y.Nishina: "Fabrication and Modification of Microcluster Lattice System" Proc.of the Science and Technology of Atomically Engineered Materials, eds.P.Jena, S.N.Khanna and B.K.Rao, (World Scientific, Singapore, 1996). 77-83

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Suto, A.Kasuya, C.-W.Hu, A.Wawro, K.Sakamoto, T.Goto and Y.Nishina: "Initial Stage of C_<60> Film Growth and Reaction on Si (111) 7x7 and Graphite Surfaces Studied by HREELS-STM" Thin Solid Films. 281/282. 602-605 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Suto, A.Kasuya, C.-W.Hu, A.Wawro, K.Sakamoto, T.Wakita, T.Goto and Y.Nishina: "Local Structure and Chemical Reaction of C_<60> Films on Si (111) 7x7 Studied by HREELS-STM" Mater.Sci.Eng.A. 217/218. 34-37 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, T.Suzuki, T.Wakita, S.Suto, C.-W.Hu, T.Ochiai, and A.Kasuya: "SiC Film Formation from C_<60> Monolayer on Si (111) 7x7 and Si (100) 2x1 Surfaces Studied by HREELS-STM" Appl.Surf.Sci.121/122. 200-203 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, T.Wakita, T.Suzuki, S.Suto, C.-W.Hu, and A.Kasuya: "The Quality of SiC Film Formed by Thermal Reaction of C_<60> Monolayer on Si (111) - (7x7) Surface" Sci.Rep.RITU A. 44. 55-58 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Suto, K.Sakamoto, T.Wakita, C.-W.Hu and A.Kasuya: "Vibrational Properties and Charge Transfer of C_<60> Adsorbed on Si (111) - (7x7) and Si (100) - (2x1) Surfaces" Phys.Rev.B. 56. 7439-7445 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Matsumoto, K.Sakamoto, Y.Okawa, S.Suto and K.Tanaka: "The Growth Mechanism of (-Cu-O-) Strings on Ag (110) Studied by Scanning Tunneling Microscopy, X-ray Photoelectron Spectroscopy and High Resolution Electron Energy Loss Spectroscopy" J.Chem.Phys.107. 10185-10190 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Suto, K.Sakamoto, T.Wakita, M.Harada and A.Kasuya: "Interaction of C_<60> with Silicon Dangling Bonds on the Si (111) - (7x7) Surface" Surface Science. 402-404. 523-528 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, M.Harada, H.Ashima, T.Suzuki, T.Wakita, A.Kasuya and S.Suto: "SiC Islands Grown on Si (111) - (7x7) and Si (100) - (2x1) Surfaces by C_<60> Precursor" J.Electron Spectrosc.Relat.Phenom.88-91. 897-903 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, T.Suzuki, M.Harada, T.Wakita, S.Suto and A.Kasuya: "SiC Film Formation and Growth by the Thermal Reaction of a C_<60> Film Adsorbed on a Si (111) - (7x7) Surface : Bonding Nature of C_<60> Molecules and SiC-film Surface Phonons" Phys.Rev.B. 57. 9003-9014 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, M.Harada, D.Kondo, A.Kimura, A.Kakizaki and S.Suto: "Bonding State of the C_<60> Molecule Adsorbed on a Si (111) - (7x7) Surface" Phys.Rev.B. 58. 13951-13956 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Kasuya, C.-W.Hu, S.Suto, K.Tohji, H.Takahashi, R.Czaika, A.Wawro and Y.Nishina: "Chemical Reactions and Electronic Functions of Carbon Cluster Arrays Studied by Scanning Tunneling Spectroscopy and High Resolution Electron Energy Loss Spectroscopy" Acta Physica Polonica A. 93. 317-322 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Suto: "Vibrational Modes and Structure of C_<60> on Si (111) 7x7 and Graphite Surfaces : Study by HREELS and STM" Clusters and Mesoscopic Matreials- Physical and Chemical Properties-, eds.T.Arai, K.Yamamoto, G.Sugano, (Kodansha-Scientific/Springer, Tokyo, 1999). 445-453

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, D.Kondo, Y.Ushimi, M.Harada, A.Kimura, A.Kakizaki and S.Suto: "Thermal Induced Transition in Bonding Nature of C_<60> Molecules Adsorbed on a Si (111) - (7x7) Surface" J.Electron Spectrosc.Relat.Phenom.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, D.Kondo, M.Harada, A.Kimura, A.Kakizaki and S.Suto: "Electronic Structures of C_<60> Adsorbed on Si (111) - (7x7) and Si (100) - (2x1) Surfaces" Surface Science. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Wakita, K.Sakamoto, A.Kasuya, Y.Nishina and S.Suto: "Adsorption and Thermal Reaction of C_<70> on Si (111) - (7x7) and Si (100) - (2x1) Surfaces : Comparison with C_<60>" Appl.Surf.Sci.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Suto, K.Sakamoto, D.Kondo, T.Wakita, A.Kimura and A.Kakizaki: "Bonding Nature of C_<60> Adsorbed on Si (111) - (7x7) and Si (100) - (2x1) Surfaces Studied by HREELS and PES" Surface Science. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] D.Kondo, K.Sakamoto, Y.Ushimi, M.Harada, A.Kimura, A.Kakizaki and S.Suto: "Change in Electronic Structure of C_<60> Molecules Adsorbed Si (001) - (2x1) Surface by Thermal Effect" Jpn.J.Appl.Phys.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sakamoto, D.Kondo, Y.Ushimi, A.Kimura, A.Kakizaki and S.Suto: "Thermal-Dependent Electronic Structure at the Interface of C_<60> Adsorbed Si (111) - (7x7) Surface" Surface Science. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Suto, K.Sakamoto, D.Kondo, T.Wakita, A.Kimura, A.Kakizaki, C.-W.Hu and A.Kasuya: "Interaction of C_<60> with Si (111) 7x7 and Si (100) 2x1 Surfaces Studied by STM,HREELS and PES : Annealing Effect" Surface Science. (in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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