Improving Osteogenesis Activity on BMP-2-Immobilized PCL Fibers Modified by the γ-Ray Irradiation Technique

Figure 2

X-ray photoelectron spectroscopy (XPS) wide-scan spectra of (a) PCL, (b) AAc-PCL, (c) BMP-2/PCL, and (d) BMP-2/AAc-PCL.