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We investigate the voltage-driven translocation dynamics of individual DNA molecules through solid-state nanopores in the diameter range 2.7–5nm. Our studies reveal an order of magnitude increase in the translocation times when the pore diameter is decreased from 5 to 2.7nm, and steep temperature dependence, nearly threefold larger than would be expected if the dynamics were governed by viscous drag...
A simple and reproducible method for the preparation of gold films on mica with large (typically 0.8–1.0μm) atomically flat (111) terraces is described. The procedure involves thin gold film evaporation onto freshly cleaved mica substrates, followed by 1min annealing at 650°C under nitrogen. The annealed gold surfaces are compared to those of freshly evaporated gold films on mica using cyclic voltammetry...
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