Fig. 1.

Characterizations of PLGA-based microspheres fabricated by microfluidic electrospraying. (a) The morphology, inner structure, and Mg element (green) distribution observed by SEM at 5 kV. (b) The size distribution. (c) FTIR spectra (d) The bone affinity property of PLGA-based microspheres evaluated by binding rate to hydroxyapatite (HA) nanoparticles at 37 °C. (e) The accumulative Mg²⁺ release profiles in vitro at 37 °C. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)