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Piezoresponse force microscopy on doubly clamped nanowires
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19.Besides nanowires, the hydrothermally synthesized KN material also contains micrometric, cubic KN particles.
21.Note that this domain size can not be due to standing waves since this would result in a sound velocity around five orders of magnitude lower than what we would expect for KN nanowires (in the range of a few hundered m/s).
23.Here we take this value based on , and at room temperature, reported in M. Zgonik, R. Schlesser, I. Biaggio, E. Voit, J. Tscherry, and P. Gunter, J. Appl. Phys. 74, 1287 (1993).
25.This equation assumes constant and in the vicinity of the tip.
26.This value is in the same order of magnitude of reported for KN single crystals. However, it is difficult to compare them because the field term responsible for the measured deformation can not be determined (that is why we say “nominal” piezoelectric coefficient here)and there is a considerable mechanical clamping effect for the nanowires.
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