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. 2023 May 15;15(20):24109–24119. doi: 10.1021/acsami.3c02266

Figure 1.

Figure 1

(A) SEM images of PVDF-PEI ENs, which are prepared using various concentrations of PVDF and PEI solutions (PVDF/PEI mixture in a 9:1 ratio (v/v), PVDF in DMF/Ac (2:8; v/v), and PEI in DMF; insets show SEM images of PVDF/PEI ENs in different magnifications). (B) Histogram for diameter distribution of PVDF-PEI ENs, which are prepared using various concentrations of PVDF and PEI solutions (PVDF/PEI mixture in a 9:1 ratio (v/v), PVDF in DMF/Ac (2:8; v/v), and PEI in DMF; insets show water drop images of contact angle measurements on PVDF/PEI ENs).