Optimal Size of Gold Nanoparticles for Surface-Enhanced Raman Spectroscopy under Different Conditions

Table 2

SERS spectral peak assignment of 4-ATP^a and 4-NTP^b.

SERS peak (cm^−1) of 4-ATP	Assignment	SERS peak (cm^−1) of 4-NTP	Assignment
390	𝛿 (CS)	332	𝛿 (CS)
635	𝛾 (CCC)	723	𝜋 (CH) + 𝜋 (CS) + 𝜋 (CC)
1005	𝛾 (CC) + 𝛾 (CCC)	854	𝜋 (CH)
1079	𝜈 (CS)	1081	𝜈 (CS)
1177	𝜈 (CH)	1110	𝛿 (CH)
1485	𝜈 (CC) + 𝛿 (CH)	1340	𝜈 (NO2)
1587	𝜈 (CC)	1569	𝜈 (CC)

aThe peak assignment of 4-ATP is from [24, 25].
^bThe peak assignment of 4-NTP is from [25].