Fig. 5From: Electrospun Aligned Fibrous Arrays and Twisted Ropes: Fabrication, Mechanical and Electrical Properties, and Application in Strain SensorsOptical images of the electrospun nanofibers obtained at different rotating speeds of the outer frame: a 100 rpm, b 600 rpm, c 800 rpm, d SEM image of the twisted nanofiber rope with smooth surface obtained from (b), and e SEM image of the twisted nanofiber rope obtained from (c)Back to article page