Silica diatom shells tailored with Au nanoparticles enable sensitive analysis of molecules for biological, safety and environment applications

Table 1 Raman and SERS peaks of BSA in the 800–1800 cm⁻¹ range, and tentative assignment of peaks

Raman peak BSA	SERS peak BSA	Tentative assignment
1004	1004/1039	Phenylalanine (Phe) ring breathing
	1228–1297	Amide III [26,27,28]
1325		CH₂ twisting [27] orCH bending [28]
1401	1392	Aromatic amino acids COO- stretching [27,28,29]
1450	1450	CH₂ and CH₃ scissoring [26,27,28]
	1507	Carbon skeleton stretching modes at 1509 cm⁻¹
	1556–1576	Trp - Phe
	1626	Tyr + Phe [27, 28]
1658	1670	Amide I [27, 28]