▎ 摘　　要

The surface structure instability of the nanoscale Hydroxyapatite (HAP) and reduced graphene oxide (rGO) sheets under the dynamic chemical environment capable of forming host-guest complexes has been determined by nuclear magnetic resonance (NMR) spectroscopy and scanning probe microscopy (SPM). From the NMR and SPM studies, we have found that the interaction between the nanoHAP and rGO sheets is occurred through the surface POxH- group of nanoHAP with epoxy carbon of rGO. Complexation of rGO sheets with nanoHAP facilitates electron transfer between them and an enhanced piezo response of 65 +/- 2.5 pm/V at the nanoHAP intercalated rGO region.