Adsorption and desorption of hydrogen and ethene on clean Si (111) faces

Abstract

Workfunction, surface conductivity, field effect mobility and desorbed species have been measured after adsorption of hydrogen and ethene on heated clean silicon (111) faces. Whereas the hydrogen studies mostly show the same drastic changes as with cleaved faces, ethene does not change the electronic parameters except the electron affinity due to the dipole moment of the adlayer. During that treatment desorption of ethene and hydrogen due to decomposition is observed. The results enable a study of hydrogenation of ethene for simultaneous adsorption.