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Development of Scanning Tunneling Microscope Operated under High Pressure Environments

Research Project

Project/Area Number 09555101
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Electronic materials/Electric materials
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

KAI Shoichi  Kyushu Univ., Dept. Applied Physics, Professor, 大学院・工学研究科, 教授 (20112295)

Co-Investigator(Kenkyū-buntansha) OKABE Hirotaka  Kyushu Univ., Dept. Applied Physics, Assist. Professor, 大学院・工学研究科, 助教授 (90221142)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥11,500,000 (Direct Cost: ¥11,500,000)
Fiscal Year 1999: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1998: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1997: ¥6,200,000 (Direct Cost: ¥6,200,000)
Keywordshigh pressure environments / liquid crystals / scanning tunneling microscope / monolayer / even-odd effect / alignment structure / n-cyanobiphenyle / n-alkyloxy-cyanobiphenle / 奇遇性 / 2硫化モリブデン / 6000気圧 / 超高圧STM / フラーレン / 非平衡物性 / 相転移
Research Abstract

The aim of this research project is to develop a scanning tunneling microscope (STM) capable to be easily handled under super high pressure environments and to study on interfacial phase transition through STM observation of molecular alignments of liquid crystal monolayers as well as their alignment structures. The results obtained are following.
(1) The improvement of a high pressure STM and the realization of its operation under 600 MPa were done.
(2) The molecular alignments of CィイD260ィエD2 and CィイD270ィエD2 were directly observed with STM under 350MPa. Although phase transitions (PHs) of bulk phase of CィイD260ィエD2 and CィイD270ィエD2 were observed near 350MPa based on previous studies, PHs of the monolayers were not observed at least by 400MPa
(3) The systematic observations were carried out for the molecular alignments of homologous series in monolayers of n-cyanobiphenyle (nCB) and n-alkyloxy-cyanobiphenle (nOCB) liquid crystals on highly oriented pyrolytic graphite (HOPG) and molybdenum d … More isulfide (MoSィイD22ィエD2) substrates using scanning tunneling microscope (STM), as well as two-phase mixtures of n-CB. In nCB with n=odd number, only the single row alignments in the monolayer was observed. The monolayer alignments of nCB with n=even on the other hand showed double row characteristics. For nOCB these tendencies were opposite, that is, single tow for n=even and double row for n=odd. Thus all the observed aspects clearly indicated the odd-even effect of carbon numbers in alkyl chains. The origin of the even-odd effect is due to the orientation of prana-zigzag planes of alkyl-chains in nCB and nOCB, which is perpendicular to the substrate plane. The odd-even effect is therefore strongly related to the strength of interactions with substrates through such an orientation. In nCB and nOCB for n=odd, the end carbon atom of an alkyl-chain must be free from and rigid substrates respectively. That is the interaction for n=even in nCB (nOCB) is stronger (weaker) than that for n=odd. This difference leads to basically two different alignments, I.e., the single and double rows. The proposed model has been verified by computer simulation Less

Report

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

    (22 results)

All Other

All Publications (22 results)

  • [Publications] Seiji TAKI: "Molecular Alignment in Monolayers of Mixtures of Cyanobiphenyl Liquid Crystals on MoS_< 2> Substrate"Journal of the Physical Society of Japan. 68・3. 709-711 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 大石 雅明: "シアノビフェニル(nCB)系液晶のHOPG基板上配列に関する分子動力学シミュレーション"九州大学工学集報. 72・2. 147-152 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Seiji TAKI: "Systematic Study of Odd-Even Effect in Molecular Alignments of Cyanobiphenyl Liquid Crystals with Scanning Tunneling Microscope I. Experimental Observation"Journal of the Physical Society of Japan. 68・4. 1286-1291 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Seiji TAKI: "STM Images of Molecular Alignments in Monolayers of Cyanobiphenyl Liquid Crystals on Graphite and MoS_< 2> Substrates"FORMA. 13. 351-362 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 相良 和彦: "シアノビフェニル系液晶混合物の二硫化モリブデン基板上での配列構造のSTM観察"九州大学工学集報. 70・2. 121-126 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tsutomu KADOTANI: "Misture Alignments on Graphite Substrates in Cyanobipheryl Liquid Crystals Observed using Scanning Tunneling Microscopy"Journal of the Physical Society of Japan.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Seiji TAKI, Kazuyuki SAGARA, Tsutomu KADOTANI and Shoichi KAI: "Molecular Alignment in Monolayers of Mixtures of Cyanobiphenyl Liquid Crystals on MosィイD22ィエD2 Substrate"Journal of the Physical Society of Japan. 68-3. 709-711 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Masaaki OOISHI, Hirotaka OKABE, Seiji TAKI, Munetaka TAKEUCHI, Nozomi, KAMIYA and Shoichi KAI: "Molecular Dynamics Simulation of CB Series Liquid Crystals on HOPG"Technology Reports of Kyushu University. 72-2. 147-152 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Seiji TAKI, Tsutomu KADOTANI and Shoichi KAI: "Systematic Study of Odd-Even Effect in Molecular Alignments of Cyanobiphenyl Liquid Crystals with Scanning Tunneling Microscope I, Experimental Observation"Journal of the Physical Society of Japan. 68-4. 1286-1291 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Seiji TAKI and Shoichi KAI: "STM Images of Molecular Alignments in Monolayers of Cyanobiphenyl Liquid Crystals on Graphite and MosィイD22ィエD2 Substrates"FORMA. 13. 351-362 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kazuhiro SAGARA, Seji TAKI and Shoichi KAI: "Observation of Alignments in Mixtures of Cyanobiphenyl Liquid Crystals on Molibdenum Disulfide Substrate by Scanning Tunneling Microscope"Technology Reports of Kyushu University. 70-2. 121-126 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tsutomu KADOTANI, Seiji TAKI and Shoichi KAI: "Mixture Alignments on Graphite Substrates in Cyanobiphenyl Liquid Crystals Observed Scanning Tunneling Microscope"Journal of the Physical Society of Japan. 36-7A. 4440-4445 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Seiji TAKI: "Molecular Alignment in Monolayers of Mixtures of Cyanobiphenyl Liquid Crystals on MoS, Substrate"Journal of the Physical Socienty of Japan. 68・3. 709-711 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 大石 雅明: "シアノビフェニル(nCB)系液晶のHOPG基板上配列に関する分子動力学シミュレーション"九州大学工学集報. 72・2. 147-152 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Seiji TAKI: "Systematic Study of Odd-Even Effect in Molecular Alignments of Cyanobiphenyl Liquid Crystals with Scanning Tunneling Microscope I..Expreimental Obsevation"Journal of the Physical Socienty of Japan. 68・4. 1286-1291 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Seiji TAKI: "STM Images of Molecular Alignments in Monolayers of Cyanobiphenyl Liquid Crystals on Graphite and MoS, Substrates"Society for Science on FORM, Japan. 13. 351-362 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Taki: "Molecular Alignments in Mixtures of Monolayers of Cyanobiphenyl Liquid Crystals on MoS,Substrate" J.Phy・Society of Jpn.68・3(印刷中). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] S.Taki: "Systematic Study of Odd-Even Effect in Molecular Alignments of Cyanobiphenyl Liquid Crystals with Scanning Tunneling Microscope" J.Phys.Society of Jpn.68・4(印刷中). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Kuboyama: "Dehydrogenation Mechanism by Photocatalysis of Tungstic Acid with a Water-Soluble Organic Material" Report on Prog.Polymer Phys.Jpn. 40. 455-458 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Okabe: "Propagating Properties of Surface Waves and Viscoelasticity near the Gelation Point" Jpn.J.Appl.Phys.37・5B. 2815-2817 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 相良和彦: "シアノビフェニル系液晶混合物の二硫化モリブデン基板上での配列構造のSTM観察" 九州大学工学集報. 70-2. 121-6 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Tsutomu KADOTANI: "Mixture Alignments on Graphite Substrates in Cyanobiphenyl Liquid Crystals Observed using Scanning Tunneling Microscopy" Jpn.J.Appl.Phys. 36-7A. 4440-5 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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