The size and shape of the electrospun fibers were determined by scanning electron microscopy (SEM) JSM-5510 (Jeol Ltd., Tokyo, Japan) equipped with a digital camera, at 15 kV accelerating voltage. Fibers were examined in different positions to estimate the electrospun fibers diameters15 (link). A segment of the fibers was positioned on the sample holder, then sputter-coated with platinum palladium (Au/Pd) using a vacuum evaporator (Edwards)15 (link),16 (link).
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