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. 2023 May 9;16(10):3609. doi: 10.3390/ma16103609

Figure 1.

Figure 1

Cross-sectional microstructure of the samples obtained by five different processes: (a) PN3h, (b) PON3h-30Pa, (c) PON3h-40Pa, (d) PON3h-40Pa, and (e) PON4h-40Pa.