Surface-enhanced Raman Scattering and Localized Surface Plasmon Resonance Detection of Aldehydes Using 4-ATP Functionalized Ag Nanorods

Abstract Formaldehyde, acetaldehyde, and benzaldehyde are well-known carcinogens affecting human health adversely. Thus, there is a need for efficient detection of these aldehydes. This work uses 4-aminothiophenol (4-ATP) functionalized silver nanorods (Ag NRs) to detect three The mode includes localized surface plasmon resonance (LSPR) surface-enhanced Raman scattering (SERS). LSPR band 4-ATP Ag NRs shows linear decrease in absorbance with the increase formaldehyde acetaldehyde concentrations. A sensitivity 0.96 0.79 ?A/mM were obtained. In case benzaldehyde, nearly exponential concentrations was observed. Above 98.4 ?M concentration, diminishes completely. LoD using 33.8 24.6 ?M, respectively. SERS studies reveal that binds through both –SH –NH 2 groups facilitates inter-particle charge transfer process. appearance b modes vibration evidences this presence aldehydes, change shape, relative intensities, position observed primarily vibration, evidencing modulation These remarkable changes seen concentration Therefore, aldehydes possible as low ~ 1 ?M.