Table 2.
Bacterial growth on Ag/a-C : H : N nanocomposites generated by a 4 : 1 or a 2 : 1 ratio of NH3/C2H4 after inoculation with 1.5 × 104 CFU in 1 ml LB agar-containing KNO3. The plasma coatings were tested (a) as deposited for their antibacterial properties or (b) after a 1 day exposure to 1 ml of H2O to induce Ag+ leaching. Bacterial growth is expressed as the percentage of colonies growing relative to those found in the uninhibited control.
| coating parameter |
bacterial growth (%) |
||
|---|---|---|---|
| NH3/C2H4 | power (W) | P. aeruginosa | S. aureus |
| (a) | |||
| 4 : 1 | 8 | 0 | 7.5 ± 5 |
| 4 : 1 | 15 | 0 | 0 |
| 4 : 1 | 25 | 0 | 0 |
| 4 : 1 | 50 | 0 | 0 |
| 2 : 1 | 8 | 0 | 33 ± 10 |
| 2 : 1 | 15 | 0 | 0 |
| 2 : 1 | 25 | 0 | 0 |
| 2 : 1 | 50 | 0 | 0 |
| (b) | |||
| 4 : 1 | 8 | 100 | 100 |
| 4 : 1 | 15 | 50 ± 1 | 100 |
| 4 : 1 | 25 | 20 ± 2 | 100 |
| 4 : 1 | 50 | 0 | 10 ± 1 |
| 2 : 1 | 8 | 100 | 100 |
| 2 : 1 | 15 | 50 ± 1 | 100 |
| 2 : 1 | 25 | 10 ± 1 | 100 |
| 2 : 1 | 50 | 0 | 0 |