Figure 2: (A) Thermogravimetric analysis (TGA) of nHA coated with various thicknesses of PGA. (B) TGA of uncoated nHA, nHA coated with PGA (nHA-PGA) and nHA coated with PGA-PEG (nHA-PGA-PEG). (C) Fourier transform infrared spectroscopy of nHA, nHA-PGA, and nHA-PGA-PEG.