Fast Coprecipitation of Calcium Phosphate Nanoparticles inside Gelatin Nanofibers by Tricoaxial Electrospinning

Figure 4

TEM images of GCaP50 (a) and of GCaP375 ((b)–(d)) samples. Scale bars: 1 µm ((a), (b)); 100 nm ((c), (d)).

(a)

(b)

(c)

(d)