A supported probe device that has a probe tip and probe body, the probe
body having a sample facing surface and an opposing surface. The probe
tip and a first electrode are on the sample facing surface. A second
electrode is present on the probe body opposing surface. A third
electrode is spaced from the second electrode, so that the second
electrode is between the third electrode and the probe body. A first DC
voltage source is electrically coupled to the first electrode, as is a
first sensing circuit. A second DC voltage source is electrically coupled
to the second electrode, and an AC voltage source electrically coupled to
the third electrode. The probe body may be cantilevered.