The Effect of Solvent on Surface Enhanced Raman Scattering Spectra of Colloidal Silver

Abstract

Abstract: This paper reports the effect of solvent on the surface enhanced Raman scattering (SERS) spectra of colloidal silver, using₂-aminobenzimidazole(BIMNH₂) as a probe molecule.The absorption spectra indicate that the state of aggregation of colloidal silver is not alike in different solvents, the degree of dispersion of colloidal silver in different solvents always increases in the.order of C₂H₅OH, C₂H₅OC₂H₅, CH₃OH, H₂O, colloidal silver is more dispersed in CHCl₃ than in CH₂Cl₂, CCl₄, the latter two systems are almost the same.Different states of aggregation will give the different intensities of SERS.Experiment also indicates that the degree of dispersion of colloidal silver is always larger in mixed solvent than in single solvent.

Key words: Colloidal silver, Surface enhanced Raman scattering, Effect of solvent, 2-Aminobenzimidazole

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HE Zhang-Fei, GU Ren-Ao. The Effect of Solvent on Surface Enhanced Raman Scattering Spectra of Colloidal Silver[J]. Chem. J. Chinese Universities, 1993, 14(1): 102.

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The Effect of Solvent on Surface Enhanced Raman Scattering Spectra of Colloidal Silver

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