Fig. 2. (A) Nanoparticle size measurement using Dynamic Light Scattering (DLS) measurement of (a) NPs (BSA-PEG nanoparticles) and (b) GF NPs (growth factor coated BSA-PEG nanoparticles) and Transmission Electron Microscopy (TEM) images of (c) NPs and (d) GF NPs. (B) Scanning Electron Microscopy (SEM) image of PLGA–collagen–chitosan nanofibers (a) Mag: 800× and (b) Mag: 5000×.