Table 1 Content of various centers on graphite surface as a function of absorbed dose at electron beam processing
Absorbed dose (kGy) | Content of surface centers with different pKa values (μmol/g) | |||||
|---|---|---|---|---|---|---|
pKa −4.4 | pKa 2.5 | pKa 6.4 | pKa 8.8 | pKa 14.2 | 10.5 | |
0 | 26.3 | 2.1 | 7.1 | 0.7 | 25,1 | 0.92 |
25 | 6.2 | 1.1 | 0.2 | 1.8 | 16.0 | 0.13 |
50 | 6.0 | 5.4 | 0.1 | 1.3 | 4.0 | 0.44 |
75 | 31.5 | 1.5 | 2.0 | 2.1 | 17.2 | 0.58 |
100 | 1.8 | 0.3 | 4.6 | 3.8 | 1.1 | 0.59 |
150 | 1.9 | 0.7 | 2.9 | 1.6 | 23.1 | 0.66 |
200 | 7.0 | 4.4 | 2.8 | 3.0 | 29.7 | 0.04 |
300 | 7.1 | 4.3 | 3.2 | 2.6 | 5.7 | 0.95 |
400 | 0.3 | 5.6 | 6.2 | 0.3 | 34.8 | 1.16 |
600 | 3.8 | 2.4 | 7.2 | 0.8 | 1.4 | 0.64 |