Fig. 2From: Comparison of the effect of argon, hydrogen, and nitrogen gases on the reduced graphene oxide-hydroxyapatite nanocomposites characteristicsa–c XRD patterns of the synthesized powders using volume change (I), argon (II), hydrogen (III), and nitrogen (IV) gas injection (10 bar) along with the d FESEM and the TEM images of the IV powdersBack to article page