Experiments showing controllability of NFES for chitosan/PEO fibers. (a) Parallel fibers with controlled 100-μm spacing. (b) A grid pattern with controlled 100-μm spacing. (c) Parallel fibers with controlled 20-, 40-, and 100-μm spacing, respectively. (d) Arc pattern with controlled 100-μm spacing. The scale bars are 100 μm. (e) Randomly distributed nanofibers deposited via conventional electrospinning at 20 cm/s with 15 kV. (f) The average fiber diameter with standard deviation for the patterns of (a), (b), (c), (d), and (e).
Fuh et al. Nanoscale Research Letters 2013 8:97 doi:10.1186/1556-276X-8-97