Figure 2.

(A) Scheme of needle electrospinning: 1, high voltage source; 2, pump; 3, steel needle as a positive electrode; 4, fiber formation; 5, grounded steel collector. Nanofibers are collected on the black paper. (B) Scheme of rod electrospinning: 1, high voltage source; 2, steel rod as a positive electrode; 3, fiber formation; 4, grounded steel collector. Nanofibers are collected on the black paper. (C) Scheme of needleless nanospider technology: 1, steel wire used as a positive electrode; 2, steel orifice with polymer solution reservoir; 3, fiber formation; 4, nanofibrous layer collected on the supportive textile (e.g., blue polypropylene spunbond); 5, steel wire used as negative electrode.