Electromigrated nanogaps

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Electromigrated Nanogaps are gaps formed in metallic bridges formed by the process of electromigration.


A nanosized contact formed by electromigration acts like a waveguide for electrons. The nanocontact essentially acts like a one-dimensional wire with a conductance of G =2e^2/h. The current in a wire is the velocity of the electrons multiplied by th charge and number per unit length, I = veN/L or G=veN/LV. This gives a conductance of G=ve^2N/LE. In nano scale bridges the conductance falls discrete steps of multiples of the quantum conductance G =2e^2/h.


  • Electromigrated Nanogaps have shown great promise as electrodes in use in molecular scale electronics.[1]