Figure 1: Conductivity measurement setup. One-micron-high tungsten (W) nanoelectrodes with a less than 5 nm separation were prepared by decomposing Tungsten hexacarbonyl by focused ion beam [15] on a silicon chip. The silicon chip was then pressed into the DNA-lipid film surface on which gold contacts had been predeposited. Below are SEM (left-side view) and FIB (right-top view) images of the tungsten nanoelectrodes.