Tip effects in the scanning-tunneling microscopy of semiconductor electrodes (original) (raw)

Abstract

The surface properties of a WSe 2 electrode have been investigated with a scanning-tunneling microscope in an electrochemical cell. Current±potential curves have been obtained for various electrode potentials and tunneling distances. They show a strong in¯uence of the tip on the local electrode potential. The main features can be understood within a simple model describing the distribution of the electrostatic potential and its eect on the local electronic density. Ó

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  19. Calculated tunneling current as a function of the electrode potential for a separation of d 6 A and for various tip potentials.