Fig. 5
From: Structural decay of poly(ethylene terephthalate) by enzymatic degradation
SEM observation of morphological changes of film surface during treatment with Fast-PETase at three magnifications: ×1000, ×5000, and ×20,000. A–C: 4 h; D–F: 12 h; G–I: 26.5 h; J–L: 55.2 h; M–O: 64.5 h. Asterisks in (B and C) show a flat and undegraded surface, and the arrowheads in (E and F) show pores with diameters of 10‒100 nm
