Fig. 1: Stepped speed control over periodicity of oriented coils and triangle-shaped pattern.
From: A hierarchically ordered compacted coil scaffold for tissue regeneration
a Schematic of the MEW instrument. b SEM images of PCL fibers created by MEW at 90° C with different stage speeds as indicated on the left side. c The periodicity of oriented coils at 90° C and the theoretical fitting curve as a function of stage speed. d, e SEM images of PCL fibers electrospun through unidirectional (d, 1 layer and e, 10 layers) and bidirectional (f, 1 layer and g, 10 layers) paths with variable stepped speeds. h, i Enlarged images of 1 layer (h) and 10 layers (i) (the corresponding speeds are marked on the images with the units of mm/min).
