Several groups have recently performed MEW onto SES membranes to form skin , blood vessels in vitro and wound dressings . As an example, we imparted fluorescence into SES membranes using CPPs and performed MEW onto this substrate with [n]CPP-PCL blend. With the [n]CPPs dissolved into a PCL polymer solution, the electrospinning of fibers was performed using a standard SES apparatus and as expected, the resulting non-woven membranes fluoresced. This is a simple approach for SES, as solvent dissolution is already part of the workflow. Further visualization of SES membranes using SEM showed that there was only a slight variation of fiber diameters for the different [n]CPPs, with the [10]CPP-PCL having a significantly (p<0.05) higher fiber diameter than the [8]CPP-PCL, [9]CPP-PCL, and control PCL (Figure ).