Tunable Localized Surface Plasmon Resonance of Gold Nanorod by Control of Sodium Oleate

Gold nanorods (AuNRs) are powerful plasmonic nanomaterials with tunable localized surface plasmon resonance (LSPR) that make them ideal for surface-enhanced Raman scattering (SERS) sensing. In this study, we report a sodium oleate (NaOL)-assisted seed-mediated synthesis of AuNRs in a CTAB-based system. Varying NaOL amount allowed to control the nanorod aspect ratio, improve monodispersity. The resulting products have been confirmed by X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and energy-dispersive X-ray spectroscopy (EDS).