Figure 2. Physical characterization of electrospun PCL nanofibers. A: Tensile stress-strain curve of electrospun PCL nanofiber membranes showing tensile strength of 1.74±0.18 MPa and breaking strain of 30.08±2.66%. B: The graph shows pore size distribution of nanofiber membranes in the range of 0.2–4 microns.