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Adsorption on active surfaces studied by the combined methods of STM and surface XAFS

Research Project

Project/Area Number 05403010
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field 機能・物性・材料
Research InstitutionThe University of Tokyo

Principal Investigator

OHTA Toshiaki  The Univ.Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (80011675)

Co-Investigator(Kenkyū-buntansha) ASAKURA Kiyotaka  The Univ.Tokyo, Fac.Science, Associate Professor, 理学部, 助教授 (60175164)
NAMBA Hidetoshi  The Univ.Tokyo, Fac.Science, Assistant, 理学部, 助手 (40118766)
KITAJIMA Yoshinori  KEK,PF,Assistant, 放射光実験施設, 助手 (00204892)
YOKOYAMA Toshihiko  The Univ.Tokyo, Graduate School of Science, Lecturer, 大学院理学系研究科, 講師 (20200917)
田島 裕之  東京大学, 大学院・理学系研究科, 講師 (60207032)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥24,400,000 (Direct Cost: ¥24,400,000)
Fiscal Year 1994: ¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1993: ¥19,900,000 (Direct Cost: ¥19,900,000)
KeywordsSTM / Surface XAFS / Surface Reconstruction / Adsorption of Atoms / 分子吸着構造
Research Abstract

An ultrahigh vacuum chamber for surface analysis including a STM instrument was exploited. LEED and Auger electron spectra can be measured using a reverse-view four-grid LEED optics. X-ray photoelectron spectra are also obtainable employing a Mg and Al twin-anode X-ray tube and a concenric hemispherical electron energy analyzer. We have examined a performance of the system and successfully obtained good STM images of (5ROO<3>*2) -rect. S/Ni (111), the quality of which is comparable to the previously reported data. Next we have investigated surface structure of (ROO<17>*ROO<17>) R14゚S/Cu (100) by means of STM and S K-edge SEXAFS.The combined methods of STM and SEXAFS are quite useful for the determination of surface structure, since STM gives information on the locations of adsorbate atoms as well as a long-range structure, while SEXAFS clarifies relative locations between adsorbate and substrate, these information being fully complementary to each other. On (ROO<17>*ROO<17>) R14゚S/Cu (100) STM has revealed the lateral positions of two kinds of S atoms. Combining the results of SEXAFS, we have proposed a new surface structure model in which the surface Cu layr is significantly reconstructed. In the unit cell four S atoms locate on the rearranged hollow site of the surface Cu layr and other four embedded S atoms are on the normal fourfold hollow site of the second Cu layr.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] S.Yagi et al.: "Structural and electronic properties of molecularly adsorbed CS_2 on Cu(111)studied by X-ray absorption and photoelectron spectroscopies" Surface Science. 311. 172-180 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Yokoyama et al.: "Vibrational and anharmonic properties of the surface S-Nibonds in c(2×2)SlNi(100)and c(2×2)SlNi(110)from the SEXAFS point of view" Surface Science. 313. 197-208 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kitajima et al.: "Surface structures of SlNi(111)in(√<3>×√<3>)R30°and (5√<3>×2)phases studied by surface extended X-ray absorption fine structure spectroscopy" Surface Science. 320. L89-L94 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Yokoyama et al.: "Surface structures and electronic proporties of SO_2 on Ni(111) and Ni(100)studied by S K-edge X-ray absorption fine structure spectroscopy" Surface Science. 324. 25-34 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Kuroda et al.: "Surface XAFS-New aspects of its application in the structural study of adsorption phenomena" J.Synchrotron Radiation. 1. 91-94 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Hamamatsu et al.: "Surface structure of (√<17>×√<17>)R14°S/Cu(100)studied by scanning tunneling microscopy and surface extended X-ray absorption fine structure" Surface Science. (発表予定).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Yagi et al.: ""Structural and electronic properties of molecularly adsorbed CS_2 on Cu (111) studied by X-ray absorption and photoelectron spectroscopies"" Surface Science. 311. 172-180 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Yokoyama et al.: ""Vibrational and anharmonic properties of the surface S-Ni bonds in c (2*2) S/Ni (100) and c (2*2) S/Ni (110) from the SEXAFS point of view"" Surface Science. 313. 197-208 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kitajima et al.: ""Surface structures of S/Ni (111) in (ROO<3>*ROO<3>) R30゚ and (5ROO<3>*2) phases studied by surface extended X-ray absorption fine structure spectroscopy "Surf.Sci.320 (1994) L89-94." Surface Science. 320. L89-L94 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Yokoyama et al.: ""Surface structures and electronic properties of SO_2 adsorbed on Ni (111) and Ni (100) studied by S K-edge X-ray absorption fine structure spectroscopy" Surf.Sci.324 (1995) 25-34" Surface Science. 324. 25-34 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Kuroda et al.: ""Surface XAFS-New aspects of its application in the structural study of adsorption phenomena" J.Synchrotron Radiation 1 (1994) 91." J.Synchrotron Radiation. 1. 91-94 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Hamamatsu et al.: ""Surface structure of (ROO<17>*ROO<17>) R14゚S/Cu (100) studied by scanning tunneling microscopy and surface extended X-ray absorption fine structure" submitted to Surf.Sci." Surface Science. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Kuroda and T.Ohta: "Surfau XAFS-New ospects of its applications in the structural study of adsoystion phenomcna" J.Synchrotron Radiation. 1. 91-94 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] S.Yagi,T.Yokoyama,T.Ohta et al.: "Structural and electronic propertics of moleculorly adsorbed CS_2 on Cu(111) studied by X.ray obsorption and photoelectron spectroscopies" Surface Science. 311. 172-180 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Yokoyama,H.Hamamatsu et al.: "Vibrational and anharmonic properties of the surface S-Ni bonds in c(2×2)S/Ni(100) and c(2×2)S/Ni(110) from SEXAFS point of view" Surface Seience. 313. 197-208 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] L.Troga,T.Yokoyama et al.: "Determination of bond lengths,atomic mean-square relative displacements and local thermal-expansion by means of soft X-ray photoabsorption" Physical Revieu. B49. 888-898 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Namba,T.Ohta,and H.Kuroda: "Photo-stimulated desorption of hydrogen-ions from water chemisorbed and condensed on Si (100) surfaces by synchrotron-radiation" Applied Surface Science. 79/80. 84-88 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Kitajima et al: "Surface structure of S/Ni(111) in (√3×√3)R30° and (S√3×2) plases studied by surface extended X-ray absorption fine strueture spectroscopy" Surface Science. 320. L89-L94 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 八木伸也 他: "Structural and electronic properties of molecularly adsorbed CS_2 on Cu(III) studied by X-ray absorption and photoelectron spectroscopies" Surface Science. (印刷中).

    • Related Report
      1993 Annual Research Report
  • [Publications] 横山利彦 他: "Vibrational and anharmonic properties of the surface S-Ni bonds in C(2×2)S/Ni(100) and C(2×2)S/Ni(110) from the SEXAFS point of view" Surface Science. (印刷中).

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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