Fig. 11.

SEM images of nFA coated PETG and nFA coated PLA filament

a) nFA coated PETG filament: magnification 50×

white arrow points to one of several notches and nFA powder deposits

b) nFA coated PLA filament: magnification 50×

c) nFA coated PETG filament: magnification 250×

d) nFA coated PLA filament: magnification 250×

e) nFA coated PETG filament: magnification 500×

f) nFA coated PLA filament: magnification 500×

g) nFA coated PETG filament: magnification 1,000×

▲ points to smallest nFA particles with sizes of 100 nm

h) nFA coated PLA filament: magnification 1,000×

▲ points to smallest nFA particles with sizes of 100 nm

* points to agglomerated nFA particles with a size of 15 μm.