抄録
We demonstrate to modify DNA by coating Pd nano particle and measured an electrical characteristic of the DNA-Pd wire using the DNA tweezers. In this paper, we report a high sensitivity piezo-resistance measurement of DNA-Pd wire. The wire is prepared capturing between the probe tips of the tweezers. An AFM probe (spring constant: 0.02N/m) can be used for giving a displacement to the wire and the displacement is also detected by AFM system. An electric current through the wire was monitored by lock-in-amplifier applying 0.1Hz sine wave voltage. I-V curves of the DNA-Pd wire were measured just before bending and during 800nm bending of the wire respectively. The resistivity of the fabricated Pd wire was estimated to be 16.9Ω・cm. The resistance of the wire was changed from 0.429Ω to 0.453Ω by the extension. As demonstrated here, this method is useful for an electro-mechanical evaluation technique of nano materials.
