Fig. 3From: Piezoelectric Size Effects in a Zinc Oxide MicropillarOptical microscope images of ZnO micropillars: a 1.5 μm, b 3 μm, c 7 μm, and 45° and tilted SEM images of ZnO micropillars: d 1.5 μm, e 3 μm, and f 7 μmBack to article page