. Author manuscript; available in PMC: 2017 Jan 1.

Published in final edited form as: J Biomater Sci Polym Ed. 2016 Oct 19;28(1):15–32. doi: 10.1080/09205063.2016.1239947

Table 3.

Surface elemental concentrations for RF-TMS + NH₃/O₂ over 12-week immersion period from XPS (atomic %)

Immersion time	C	Si	O	N	Na	Cl	N/Si^*
Day 0	35.58	19.29	41.74	3.31	0.08	0.00	*0.17*
Day 1	47.61	19.74	31.24	0.68	0.38	0.35	*0.03*
Day 3	54.65	19.53	24.14	1.68	0.00	0.00	*0.09*
Week 1	56.21	20.30	22.35	1.14	0.00	0.00	*0.06*
Week 2	58.24	20.34	20.25	1.10	0.07	0.00	*0.05*
Week 4	57.72	20.16	21.65	0.35	0.12	0.00	*0.02*
Week 12	59.90	20.36	18.97	0.77	0.00	0.00	*0.04*

denotes ratio of N-to-Si within surface region