Papers by Keyword: Characteristic Peak

Abstract: Raman spectra are sensitive to solute, solid or polymorphs concentrations, particle size distribution and temperature. Characteristic peak positions of tibolone and acetone were observed at 1559cm^-1 and 787cm^-1. In this paper, we used the LabRAM HR800 System to detect the Raman spectra of 11 undersaturated standard solutions (concentration range 0-150 mg/ml) at 40°C; built model that estimating concentration of tibolone in acetone solvent by relating peak intensity ratio of the components to the concentration of the solution, and the mean estimated error was only 1.723% in the testing data. The results indicate that this method of estimating concentration is feasible and simple.

Abstract: The researches of surface enhanced Raman scattering spectrum enhancement factor are based on low concentration of the solution, while the selection of solution concentration on the enhancement factor is ignored. In this paper, the substrate of nano-pillar forest structure whose density is controllable was fabricated. Using the high ability of enhancement, Raman scattering enhancement under different concentration (10g / L ~ 10-5 g / L) was tested and researched .The results indicate that the enhancement factor has close relationship with concentration, that is to say the enhancement factor will arise with the concentration decreasing. The main element, which affects the variation of the enhancement factor, is due to the change of efficiency polarization of CV molecule adsorbed on the Au nano- pillar.