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. 2019 Nov 28;10(12):829. doi: 10.3390/mi10120829

Figure 2.

Figure 2

The schematic representing the mechanism for the formation of silver nanoparticles and color change in PAA tubes at difference steps (a) electrospun PAA nanofiber, (b) neutralization of PAA nanofibers, (c) PAA nanofibers with silver ions (brown color), and (d) hybrid of PAA-silver nanofibers (dark color).