Plasmonic Ag Nanoparticles: Correlating Nanofabrication and Aggregation for SERS Detection of Thiabendazole Pesticide.

ABSTRACT: The level of aggregation and aggregate morphology of metallic nanoparticles are factors that influence the SERS signal (surface-enhanced Raman scattering), affecting reproducibility and sensitivity. This study presents a systematic evaluation of the colloidal aggregation on the SERS signal by combining transmission electron microscopy and UV-vis extinction spectroscopy. It focuses on the effect of two methods of sample preparation ("external standard method-ESM" and "standard addition method-SAM") on the SERS signal using the fungicide thiabendazole (TBZ) in Ag colloid as a probe molecule. The TBZ critical concentration (concentration for which SERS reaches the maximum intensity) was 6.0 × 10^-6 mol/L for ESM and 1.5 × 10^-6 mol/L for SAM. Besides, TBZ exhibited a sigmo

SUBMITTER: S Oliveira MJ 

PROVIDER: S-EPMC11483382 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature