SCANNING ELECTRODE QUARTZ-CRYSTAL ANALYSIS

Principles and methods for scanning electrode quartz crystal analysis (SEQCA) as a technique for mapping distribution of mass and measuring interfacial rheology are described, In SEQCA, quartz crystal resonates in a region between a normal electrode and a microelectrode scanned o ver the opposite side of the normal electrode. The surface of the quar tz crystal plate just below the scanning electrode is monitored (overs canning mode), A prototype system for the scanning electrode quartz cr ystal analysis is constructed. The dependence of the resonance propert ies on the location of the scanning electrode is studied. As a result, it was found that the qualitative mapping of the mass distribution is possible in the lateral resolution of 1 (9 MHz quartz) to 2 (5 MHz) m m, Viscoelastic properties of the load on the quartz surface are also measured qualitatively.