Electrical Conductivity Measurement of DNA Double-Stranded Chains by "One-by-One" Cutting Method Using Atomic Force Microscopy(Cross-disciplinary physics and related areas of science and technology)

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概要

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• We measured the electrical current-voltage characteristics of λDNA in vacuum using fine electrodes with a gap of about 200nm. It was found that the electrical resistance of λDNA molecules between the fine electrodes had a large variation: from 7.8MΩ to values larger than 1TΩ. This was consistent with the controversial results given in previous reports. The temperature dependence of conductivity was explained well by the Arrhenius equation. In addition, the conductivity of a single molecule of doublestranded λDNA was measured by a "one-by-one" cutting method using atomic force microscopy (AFM). The conductivity was determined to be 3×10^1S/cm, which is about the same order as that of semiconductors.

• 社団法人日本物理学会の論文
• 2006-07-15

著者

• SHIMOMURA Takeshi

  Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo

• HEIKE Seiji

  Advanced Research Laboratory, Hitachi, Ltd.

• HASHIZUME Tomihiro

  Advanced Research Laboratory, Hitachi, Ltd.

• Ito Kohzo

  Graduate School Of Frontier Sciences University Of Tokyo

• Inomata Aoi

  Graduate School Of Frontier Sciences The University Of Tokyo

• Hashizume Tomihiro

  Advanced Research Laboratory Hitachi Lid.

• Ito Kohzo

  Graduate School Of Frontier Sciences The University Of Tokyo

• Shimomura Takeshi

  Department Of Organic And Polymer Materials Chemistry Tokyo University Of Agriculture And Technology

• Heike S

  Advanced Research Laboratory Hitachi Ltd.

• Heike Seiji

  Advanced Research Laboratory Hitachi Ltd.

• FUJIMORI Masaaki

  Advanced Research Laboratory, Hitachi, Ltd.

• Heike S.

  Advanced Research Laboratory Hitachi Ltd.

• Fujimori Masaaki

  Advanced Research Laboratory Hitachi Ltd.

• INOMATA Aoi

  Graduate School of Frontier Sciences, The University of Tokyo

• ITO Kohzo

  Graduate School of Frontier Sciences, The University of Tokyo

• Ito Kohzo

  Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan

• HASHIZUME Tomihiro

  Advanced Research Laboratory, Hitachi, Ltd.:Department of Physics, Tokyo Institute of Technology

• Hashizume Tomihiro

  Advanced Research Lab., Hitachi, Ltd., Hatoyama, Saitama 350-0395, Japan

• SHIMOMURA Takeshi

  Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology

• Heike Seiji

  Advanced Research Lab., Hitachi, Ltd., Hatoyama, Saitama 350-0395, Japan

• Fujimori Masaaki

  Advanced Research Lab., Hitachi, Ltd., Hatoyama, Saitama 350-0395, Japan

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