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2003 Fiscal Year Final Research Report Summary

Preparation and modification of metal nano-contacts Photo-excitation

Research Project

Project/Area Number 14340219
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 機能・物性・材料
Research InstitutionHOKKAIDO UNIVERSITY (2003)
Osaka University (2002)

Principal Investigator

MURAKOSHI Kei  Hokkaido University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (40241301)

Co-Investigator(Kenkyū-buntansha) NABIKAA Hideki  Hokkaido University, Graduate School of Science, Research Associate, 大学院・理学研究科, 助手
Project Period (FY) 2002 – 2003
Keywordsconductance quantization / metal nano-contact / surface plasmom / SERS / STM / electrochemical potential / metal nano-particle / metal deposition
Research Abstract

We have developed novel techniques to control metal structures in the size range less than a few tens nm by combing the effects of photo-irradiation and applying an external electric field. One of the promising applications of metal nanostructures is for single molecular detection employing surface enhanced & Raman scattering (SERS). Although several sophisticated methods were successful with respect to generation of fully reproducible SERS activity, the preparations were often complicated due to the need for specialized synthetic or preparative techniques. Novel facile and controllable techniques to prepare SERS active substrates should be developed. In this study, our technique to control metal nanostructure on glass substrate was used to prepare the films showing very strong SERS signal. Sustainable metal nanocontacts were fabricated under controlled electrochemical potential in solution.
Metal nanocontacts of Cu, Ag, Ni, Pd, and Pb were fabricated via the electrochemical etching or deposition method at a gap of sustainable thin Au wires in solution. Relatively stable behaviors of the conductance quantization exhibiting a unit value were apparent at the contacts of Cu, Ag, Ni, and Pd at room temperature. Conductance quantization behavior of the Pb contact was rather unstable in comparison with other metals. echanical stability of Au nanocontact was also examined by controlling electrochemical potential in various solution containing ClO_<4->, S0_4^<2->, Cl^-ions.

  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] K.-i.Okazaki: "Characteristics of Raman Features of Isolated Single-Walled Carbon Nanotubes under Electrochemical Potential Control"Surf.Sci. in press.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.-i.Okazaki: "Preparation of Highly Dispersed Single Walled Carbon Nanotubes on Metal Surface in Solution"Trans.Mater.Res.Soc.Jpn. 28. 931-934 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.-i.Okazaki: "Absolute Potential of the Fermi Level of Isolated Single-Walled Carbon Nanotubes"Phys.Rev.B. 68. 035434 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Sawai: "Photo-induced Metal Deposition onto an Au Electrode in Solution"J.Photochem.Photobio.A. 106. 19-25 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.Li: "Metal-Dependent Conductance Quantization at Sustainable Metal Nano-contacts in Solution"Appl.Phys.Lett.. 81. 123-125 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Okazaki: "Characteristics of Raman Features of Isolated Single-Walled Carbon Nanotubes under Electrochemical Potential Control"Surf.Sci.. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Okazaki: "Preparation of Highly Dispersed Single Walled Carbon Nanotubes on Metal Surface in Solution"Trans.Moter.Res.Soc.Jpn.. 28. 931-934 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Okazaki: "Absolute Potential of the Fermi Level of Isolated Single-Walled Carbon Nanotubes"Phys.Rev.B.. 68. 035434 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Sawai: "Photo-induced Metal Deposition onto an Au Electrode in Solution"J.Photochem.Photobio.A. 106. 19-25 (2003)

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

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Published: 2005-04-19  

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