Nonlinear Studies of Surfaces and Interfaces of Advanced Semiconductor Materials

摘要

In the first studies of this kind, surface second harmonic generation (SHG) wasused to examine and compare the structural and electronic properties of noble metals in electrolytic solutions and in UHV. In rotational anisotropy measurements on Ag(lll) and Au(lll), it was found that the structural symmetry and surface morphology is very similar for these surfaces in both solution and in UHV. Very detailed wavelength dependent studies were performed on Ag(lll) in solution and in UHV in order to determine if the electronic properties of the metals in the two environments are similar. In comparative solution/UHV studies it was shown that for Cu(lll) in solution, a surface oxide film persists even under conditions where one might expect to have an oxide free surface. Semiconductors, Semiconductor Materials, Second Harmonic Generation, Interfaces, Noble Metals, Electrochemistry.