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. 2021 Dec 3;13(23):4243. doi: 10.3390/polym13234243

Figure 2.

Figure 2

Mechanisms involved in surface modification of PVDF upon exposure to diffusing argon plasma with samples kept at the floating potential: (a) polymer is exposed to slow ions, weak VUV radiation and radicals or residual atmosphere, (b) formation of a gradient surface film and radical-dependent surface oxidation, and (c) full surface oxidation upon exposure to ambient conditions.