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The representative FE-SEM images and corresponding fiber diameter distribution of electrospun fibers: (a) PVP; (b) PVP/CNC-2%; (c) PVP/CNC-4%; and (d) PVP/CNC-4%/AgNO3-0.34%. Each subfigure shows spun fibers at 10 μm and 5 μm resolution levels, and diameter distribution (bar chart).
