  We report a new technique for fabricating metallic electrodes on insulating
substrates with separations on the 1 nm scale. The fabrication technique, which
combines lithographic and electrochemical methods, provides atomic resolution
without requiring sophisticated instrumentation. The process is simple,
controllable, reversible, and robust, allowing rapid fabrication of electrode
pairs with high yield. We expect the method to prove useful in interfacing
molecular-scale structures to macroscopic probes and electronic devices .
