What does chiral mean in relation to Quartz?
Since the first observed catalytic stereospecifity of a chiral quartz substrate [Schwab32,Schwab34], chiral surfaces have been of interest in applications such as stereoselective chemical synthesis, separation of chiral compounds, crystal growth, protein adsorption, and optical activity. Therefore, studying the adsorption and reaction of chiral molecules on well-characterized chiral surfaces in UHV will provide a framework for understanding the mechanism of stereoselective interaction of molecules with surfaces. Chiral surfaces are predicted to have outstanding nonlinear optical activity. Raman and Rayleigh scattering were calculated to be three orders of magnitudes larger than from bulk material [Hecht94]. Also a large circular difference response of second harmonic generation (or second harmonic optical activity, SHOA) was measured on chiral surfaces [Byers94, Verbiest94]. With the increasing application of scanning probe techniques in thin film deposition, the formation of screw dis
