The force of attraction which appears when a potential difference is applied between a piece of metal and a piece of semi-conductor, having accurately plane surfaces in contact with one another, has been investigated. Using an electronic semi-conductor the effect does not require the presence of moisture as Johnsen and Rahbek's experiment did. The force is very roughly proportional to the square of the applied potential.
No takes yet. Share an insight, caveat, or question.
C. Balakrishnan (1950) studied this question.