| 초록 |
In this study, We synthesized SiO2@Au@Ag nanoparticles (NPs) as highly sensitive surface-enhanced Raman scattering (SERS) probes by utilizing the Ag growth onto Au NP seeds method. We report the useful method for highly sensitive chemical detection with a reliable and robust SERS probe. The SERS activity of SiO2@Au@Ag NPs is regulated by AgNO3 concentration. As the concentration of AgNO3 increases, the Ag shell on the surface of the Au NPs grows and a narrow gap is formed between the two Ag NPs on the surface of the probe. The SERS intensity detection of SiO2@Au@Ag NPs was performed using 4-aminothiophenol (ATP) which is Raman chemical. The SiO2@Au@Ag NPs can be applied as highly sensitive SERS probes and can be utilized for quantitative detection of trace chemicals. In addition, the Raman signal reproducibility of SiO2@Au@Ag NPs with respect to ATP has the potential to be used for in situ detection. |
