TABLE IV.
XPS elemental composition of the coated and uncoated surfaces at various aging time points, after exposure to fibrinogen solutions. n = 3. The nitrogen content for both ppTTg coated PDMS sample results were tested against the ppTTg coated Si wafer results by student's t test, where *p < 0.05; **p < 0.01; and ***p < 0.001.
| Sample | Day | %C | %O | %Si | %N |
|---|---|---|---|---|---|
| ppTTg coated Si wafer | 0 | 68.5 | 31.7 | 0 | 0 |
| 10 | 67.8 | 32.1 | 0 | 0.1 | |
| 100 | 67.9 | 31.6 | 0 | 0.5 | |
| Single ppTTg coated PDMS | 0 | 63.7 | 28.4 | 5.7 | 2.2*** |
| 10 | 58.3 | 29.9 | 6.9 | 4.9*** | |
| 100 | 58.8 | 24.5 | 10.9 | 5.8*** | |
| Double ppTTg coated PDMS | 0 | 67.9 | 30.0 | 2.0 | 0.1 |
| 10 | 65.7 | 31.6 | 2.5 | 0.2 | |
| 100 | 66.8 | 29.8 | 2.8 | 0.6 | |
| Native PDMS | 0 | 52.4 | 23.3 | 17.8 | 6.5 |
| 10 | 54.4 | 23.2 | 15.7 | 6.7 | |
| 100 | 53.8 | 23.2 | 16.8 | 6.2 |