The SEM micrographs of native and various PEF-treated potato
starch granules are shown in Fig. 1. It could be seen from Fig. 1A that
the surface morphology of native potato starch granules was smooth,
oval, and irregularly shaped. After being suffered the PEF treatment at
30 kV·cm−1, most starch granules still retained their granule shape
(Fig. 1B). However, some roughness or damages emerged on the
surface of potato starch granules.