Table 1.

XPS analysis of the Glass, the APTES-grafted Glass and the Glass-nHA

Sample	Atomic percentage of elements
	Cls	Nls	Ols	Si2p	P2p	Ca2p
Glass	9.96	0.00	69.21	20.83	0.00	0.00
Glass-APTES	22.49	2.94	53.20	20.89	0.22	0.24
Glass-nHA	7.39	0.73	67.22	12.36	6.04	6.26