Fig. 2: Characterization of diamond nanoparticles and the nanodiamond/polycaprolactone (ND/PCL scaffold.

Morphology of diamond nanoparticles by transmission electron microscopy, scale bar = 100 nm (a) and 50 nm (b). Surface morphology of the ND/PCL nerve bridges by scanning electron microscopy. Rough surface layer (c) and multilayered structure (d) of the ND/PCL nerve bridges. Staggered micropores in the scaffold surface (e, f). Scale bars: 20 μm (c), 10 μm (d), 10 μm (e), 5 μm (f). Mechanical properties’ evaluation of ND/PCL and PCL nerve bridges. Elastic modulus (Mpa) (g). Elongation at break (%) (h)