A nozzle for forming nanofibers by using a pressurized gas stream comprises a center tube, a first supply tube that is positioned concentrically around and apart from the center tube, a middle gas tube positioned concentrically around and apart from the first supply tube, and a second supply rube positioned...http://www.google.com/patents/US6520425?utm_source=gb-gplus-sharePatent US6520425 - Process and apparatus for the production of nanofibers
