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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Biomaterials. 2012 Dec 14;34(8):10.1016/j.biomaterials.2012.11.014. doi: 10.1016/j.biomaterials.2012.11.014

Table 1.

Summary of XPS-Determined Elemental Composition of bare glass, deactivated epoxy and amine surfaces (atom %).

Atom %
Sample O N C Si C/N C/N*
Bare Glass 67.5 ± 1.0 - 4.4 ± 1.1 28.1 ± 0.6 - -
Deactivated Epoxy 57.6 ± 2.3 - 21.7 ± 1.6 20.7 ± 0.7 - -
Amine Surface 57.0 ± 2.1 2.0 ± 0.5 18.3 ± 0.6 22.6 ± 1.4 9.1 7.0
*

Theoretical C/N ratio for 100% coupling efficiency of the diamine linker onto the surface.