Table 1. X-ray photoelectron spectroscopy (XPS) survey spectrum atomic percent compositions for polymer poly(ethyl acrylate) (PEA) and poly(methyl acrylate) (PMA) and either phosphate buffered saline (PBS) or PBS with fibronectin (Fn).
| Element | PEA PBS [%] | PEA Fn [%] | PMA PBS [%] | PMA Fn [%] |
|---|---|---|---|---|
| C1 s | 79.5 (1.0) | 55.8 (1.0) | 21.4 (1.4) | 67.4 (3.8) |
| O1 s | 19.6 (1.0) | 27.0 (1.1) | 55.5 (1.2) | 21.4 (1.3) |
| N1 s | n.d. | 8.3 (0.4) | n.d. | 7.7 (1.5) |
| Si2 p | 0.9 (0.4) | 0.1 (0.1) | 19.8 (0.8) | 0.2 (0.2) |
| Na1 s | n.d. | 3.6 (0.1) | 3.2 (0.7) | 1.9 (0.6) |
| Cl2 p | n.d. | 2.5 (0.3) | 0.1 (0.1) | 1.4 (0.3) |
| P2 p | n.d. | 2.7 (0.1) | n.d. | n.d. |
| K2 p | n.d. | n.d. | n.d. | n.d. |
Note: not detectable (n.d.); (.)=standard deviation; [%]=atomic percent (sample mean, n=3).