. 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 2.

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

Immersion time	C	Si	O	N	Na	Cl	Al	Zn	K	P	Ti	Fe	N/Si^*
Day 0	16.54	21.38	59.54	2.41	0.13	0.00	0.00	0.00	0.00	0.00	0.00	0.00	*0.11*
Day 1	23.90	18.15	52.59	2.63	1.69	0.00	1.04	0.00	0.00	0.00	0.00	0.00	*0.14*
Day 3	22.58	15.72	51.98	1.68	5.05	1.27	0.63	0.12	0.45	0.52	0.00	0.00	*0.11*
Week 1	28.83	12.84	44.58	1.21	6.59	2.15	0.85	0.00	1.24	1.64	0.07	0.00	*0.09*
Week 2	44.77	16.45	33.26	1.76	2.23	1.27	0.00	0.00	0.00	0.00	0.00	0.26	*0.11*
Week 4	46.75	19.36	31.24	1.68	0.97	0.00	0.00	0.00	0.00	0.00	0.00	0.00	*0.09*
Week 12	49.18	19.17	30.31	1.34	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	*0.07*

denotes ratio of N-to-Si within surface region