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Potential pulse perturbation time-resolved scanning tunneling microscopy is used to investigate the growth and dissolution dynamics of nanoscale islands. It is concluded that the properties of the islands can be controlled by tailoring the potential pulse perturbation.

Research was conducted to examine quantitative polarity scales based on second harmonic spectroscopy. The polarity of various liquid/liquid and vapor/liquid interfaces was determined following the demonstration that second harmonic spectroscopy can be utilized in the measurement of interface polarity. Results indicate the possible dominance of the long-range solute-solvent interactions in determining the difference in the excited- and ground-state solvation energies of the interface adsorbed molecules.

An investigation of charge transfer in high-k dielectric stacks on Si by second harmonic generation (SHG) is reported. It is observed that ambient effects in charge trapping at the dielectric/air (vacuum) interface could be significantly reduced by covering the dielectric film with a thin (semitransparent) metal (aluminum) overlayer.

The oxidation of Si (111)-H surface by second-harmonic generation rotational anisotropy (SHG-RA) at 800 nm is investigated. It is shown that 800 nm SHG is sensitive to the electronic properties of the interface and could be used to probe the evolution of the chemical state of Si surface.