Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Surface composition determined by XPS
| Si3N4 | Amine | PEG | |
|---|---|---|---|
| C | 14.1 (1.1) | 13.7 (0.7) | 15.4 (1.8) |
| N | 23.7 (0.8) | 23.8 (0.3) | 22.7 (0.8) |
| O | 32.1 (0.5) | 32.6 (0.3) | 32.7 (0.8) |
| Si | 30.1 (0.5) | 30.0 (0.6) | 29.2 (0.9) |
The elemental composition for each surface modification does not change significantly, because of the low surface concentration of the primary amines and PEG cross-linkers. Standard deviations are in parentheses.
