Table 1 Peaks of IgG antibody coated on gold film.

From: Improving the SERS signals of biomolecules using a stacked biochip containing Fe2O3/Au nanoparticles and a DC magnetic field

Functional group

Region (cm−1)

Origen SNR ratio

Enhanced SNR ratio

CC aliphatic

359.6

n/a

4.8

S–S

442.8

n/a

4.4

C–S

617

3.1

5.4

CC bond

1116

3.8

11.1

C=S

1248

3.7

9.2

C–(NO2)

1340–1400

3.7

8.7

C=C

1600–1700

n/a

2.49–2.98

C=O

1700–1850

n/a

2.44–2.61

C≅C

2079

2.9

2.6

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