“…Generally, pure PLA has an orthorhombic crystal structure ( α -form) and consists of 103-helical chains [25]. The pure PLA film showed characteristic peaks located at 2θ = 12.5, 14.8, 16.8, and 19.1°, which were attributed to the (103), (100), (110)/(200), and (203) planes of the α -form crystal, respectively [26]. Pure ZnO NPs showed characteristic peaks located at 2θ = 31.6, 34.4, 36.2, 47.4, 56.7, 62.7, 66.2, 67.9, and 69.0°, which corresponded to (100), (002), (101), (102), (110), (103), (200), (112), and (201) planes, respectively, of the hexagonal crystal of ZnO NPs (JCPDS card No 36-1451) [13].…”