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Comparison of the intensities of the assigned vibrational modes of the Raman spectra of the bulk samples of LPA with its SER signals (W=weak, M=medium, S=strong, VS=very strong)
| Mode (cm−1) | Assignment | 16:0 LPA | 16:0 SERS | 18:0 LPA | 18:0 SERS |
|---|---|---|---|---|---|
| 889 | CH2 rock | M | M | M | M |
| 1060 | C–C vib (trans) | S | - | S | - |
| 1097 or 1101 | C–C vib (gauche) | M | M | M | M |
| 1128 | C–C vib (trans) | S | S | VS | VS |
| 1294 | CH2 (twist) | S | W | VS | M |
