Direct writing of submicron Au-lines on GaAs in an electrolyte

Abstract
With a simple set-up using a glass-insulated tungsten tip dipped into an electrolyte (as is typical for scanning tunnelling microscopy) we succeeded in writing Au-lines on n-GaAs by application of 1 ms voltage pulses. So far, the smallest lines measured 250 nm in width and 80 nm in height, but these dimensions are expected to be further improved.