A Versatile Star PEG Grafting Method for the Generation of Nonfouling and Nonthrombogenic Surfaces

Table 1

Surface elemental concentration (in At.%) of C, O, Si, and N, as determined by XPS on aminated glass and PEG-modified surfaces using various star PEG coupling concentrations.

Surface	O%	C%	Si%	N%
Aminated glass	40.9	36.6	17.0	4.8
0.55% PEG	38.3	44.5	12.7	3.7
1.66% PEG	37.4	46.8	11.8	3.3
5% PEG	36.1	50.3	10.1	3.1
15% PEG	37.4	48.1	11.1	2.8