Table 2 SERS signals of BSA antigen immune react on gold film.
Functional group | Region (cm−1) | Origen SNR ratio | Enhanced SNR ratio |
|---|---|---|---|
CC aliphatic | 359.6 | n/a | 7.3 |
S–S* | 442.8 | 7.8 | 7.3 |
C–S* | 622 | 7.4 | 8.5 |
O–O* | 905 | 9.0 | 9.0 |
CC bond | 1116.536 | 7.0 | 10.7 |
C=S | 1236.089 | 6.9 | 11.2 |
C–(NO2) | 1340–1400 | n/a | 8.4 |
CH2 | 1425 | n/a | 7.3 |
C≅C | 2079.02 | 3.1 | 6.1 |
C–H* | 3184 | 1.8 | 1.8 |
