Fig. 3

TEM images of the as spun PMMA/PAN nanofibers. a normal coaxial nozzle, b inward coaxial nozzle, and c outward coaxial nozzle
TEM images of the as spun PMMA/PAN nanofibers. a normal coaxial nozzle, b inward coaxial nozzle, and c outward coaxial nozzle