Response to Comment on "Point of Zero Charge of a Corundum-Water Interface Probed with Optical Second Harmonic Generation (SHG) and Atomic Force Microscopy (AFM): New Approaches to Oxide Surface Charge"

The purpose of this response is to address several misrepresentations of Stack et al. (2001) and its intent in the preceding Comment. At issue, primarily, is our observed point of zero salt effect (p.z.s.e.) of a single crystal face of corundum using optical second harmonic generation (SHG) at a pH (~5) much lower than the accepted value (in the 8–9 range) of the pristine p.z.c. of alumina powders. Dr. Kosmulski's main claim is that our anomalous observation is the result of surface contamination.