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A sensitive; simple and label-free method for DNA detection is presented. Irradiated polyethylene terephthalate foils were etched to present conical tracks at a density of approximately 5×10 7 tracks per cm 2 . Probe DNA was immobilized at the narrow opening of the tracks (2–4nm diameter). The presence of target DNA resulted in changes in both conductance and rectification ratios in...
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