Comparative study of surface-enhanced Raman scattering activities of three kinds of silver colloids when adding anions as aggregating agents

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 368; no. 1; pp. 142 - 147
• Main Authors: Dong, Xiao, Gu, Huaimin, Kang, Jian, Yuan, Xiaojuan, Wu, Jiwei
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 20.09.2010; Elsevier
• Subjects: Aggregating agents; Anions; Chemistry; Chlorides; Colloidal state and disperse state; Colloids; Exact sciences and technology; General and physical chemistry; Interaction; Nanoparticles; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Raman scattering; Residual anions; SERS; Silver; Spectra; Surface chemistry; Anions; Residual anions; Aggregating agents; SERS; Interaction; Hydroxylamine; Nanoparticle; Sodium nitrate; Transition metal; Sodium chloride; Sulfates; Colloid; Methylene blue; Surface enhanced scattering; Substrate; Silver; Environment; Comparative study
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2010.07.029

The surface enhanced Raman scattering (SERS) spectrum of methylene blue (MB) varies observably when using different kinds of silver colloids as SERS active substrates. The colloids were synthesized by three different methods. Sodium chloride, sodium sulfate, sodium nitrate were chosen as aggregating agents in this study. Three kinds of anions were performed on hydroxylamine-reduced silver colloid and the effect of the chloride anion was investigated in the three SERS-active colloids. From the results it can be concluded that the interaction between analyte and silver nanoparticles is different in different kinds of colloidal environments and the addition of anions also has a great influence on SERS spectrum. The effects on the SERS spectra were qualitatively explained through the study of SERS spectra for various silver colloids and aggregating agents in this paper.