Fig. 4.

Morphological and biophysical behaviors of nanomagnetic scaffolds. a TEM images show the internal structure revealing incorporation of MNPs in the scaffolds nanofiber. b Magnetic properties of the nanocomposite scaffolds analyzed by a VSM. c, d Contact angle analysis was used to evaluate the wettability of the nanocomposite scaffolds, indicating significant improvement the hydrophilicity of the nanomagnetic scaffolds. Stress–strain curves showing the mechanical properties of PCL/Col I scaffold (e) and nanomagnetic scaffold (f); revealing the enhancement of the tensile strength, upon incorporation of Fe₃O₄ into scaffolds structure