Fabrication and formation mechanism of closed-loop fibers by electrospinning with a tip collector
Yan Xu1, †, 
, Yu Miao1, †, , Han Wen-Peng1, You Ming-Hao1, Zhang Jun-Cheng1, Dong Rui-Hua1, Zhang Hong-Di1, Long Yun-Ze1, 3, ‡,
, Yu Miao1, †, , Han Wen-Peng1, You Ming-Hao1, Zhang Jun-Cheng1, Dong Rui-Hua1, Zhang Hong-Di1, Long Yun-Ze1, 3, ‡, (a) Schematic illustration of the modified electrospinning setup, where a metal nail is used as the collector. (b) The corresponding schematic electric field distribution.
