An ultrasensitive SERS method for the determination of ozone using a nanogold sol as substrate and rhodamine S as probe†
Abstract
In an aggregated gold nanoparticle (AuNP) sol substrate, rhodamine S (RhS) exhibited a surface-enhanced Raman scattering (SERS) peak at 1503 cm−1. Based on the ozone oxidization and RhS–I3 particle reactions, 1.56–62.5 nmol L−1 of O3 can be determined by SERS, with a detection limit of 0.9 nmol L−1.