Fig. 1From: Control of physical properties of carbon nanofibers obtained from coaxial electrospinning of PMMA and PAN with adjustable inner/outer nozzle-endsSchematic diagrams of the nozzle-ends. a normal coaxial nozzle (viz. inner and outer nozzle-ends are balanced in the same level), b inward coaxial nozzle, and c outward coaxial nozzleBack to article page