Patent ID: 8637109

Claim:
A method for electrospinning comprising: providing a target and an electrospinning apparatus; the target comprising a first surface and an opposing second surface; the electrospinning apparatus comprising a mandrel, a mask including an aperture, a reservoir loaded with a solution, an orifice fluidly coupled to the reservoir, an energy source electrically coupled to the orifice and the mandrel and further comprising applying a first electrical potential with the energy source between the orifice and the mandrel and a second electrical potential to the mask where the second electrical potential is less that the first electrical potential; locating the mandrel adjacent the target second surface, locating the orifice at a distance from the target first surface, and locating the mask intermediate the orifice and the target first surface; electrospinning the solution through the mask aperture onto the target first surface; and where the first electrical potential is between about 10 kV and about 30 kV and the second electrical potential is between about 5 kV and about 18 kV.