Self-assembled DNA networks and their electrical conductivity

Cai, Lintao; Lintao Cai; Tabata, Hitoshi; Kawai, Tomoji
November 2000
Applied Physics Letters;11/6/2000, Vol. 77 Issue 19
Academic Journal
We report direct measurements of the intrinsic electrical characteristics of polynucleotides using a conducting-probe atomic-force microscope under vacuum. Poly(dA)·poly(dT) self-assemble a cross-interlaced network on mica, but poly(dG)·poly(dC) self-organize a uniform two-dimensional reticulated structure. Transport studies demonstrate that poly(dG)·poly(dC) can act as a semiconducting nanowire and show a better conductance than that in poly(dA)·poly(dT). © 2000 American Institute of Physics.


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