INFLUENCE OF CHLORIDE IONS ON SERS IN Ag SOL
氯离子对银胶中表面增强喇曼散射效应的影响

The influence of chloride ions on SERS of PABA (p-aminobenzioc acid) and pyridine in Ag sol were discussed. SERS of PABA in Ag sol, the influence of chloride ions on and the time dependence of SERS intensities were obser ved. It was found that the decrease of SERS intensity was caused by that the solid like phase adsorption of PABA was destroyed and the molecular adsorption state was changed dut to the competitive adsorption of chloride ions. Besides, the influence of chloride ions on the time dependence of SERS intensities of a mixture of PABA/Ag sol and pyridine/Ag sol and on the light absorption of PABA and pyridine in Ag sol were studied. These experimtnts show that the influence of chloride ions on SERS in our system are mainly chemical.