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                            Library & Multimedia
 Surface-Enhanced Raman Scattering Study of the Red Dye Laccaic Acid
NCJ Number
              255353
Journal

*Journal of Raman Spectroscopy* Volume: 38 Dated: 2007 Pages: 1259-1266
Author(s)
          M. V. Canamares;
                        M. Leona
Date Published

2007
Length
              8 pages
Annotation
              In this research project, FT‐Raman and surface‐enhanced Raman scattering (SERS) spectroscopy were applied to the study of lac dye, a highly fluorescent anthraquinone red dye.
Abstract
              The SERS spectra were obtained at different pH values on Ag nanoparticles prepared by chemical reduction with citrate and hydroxylamine, and at several excitation wavelengths, in order to find the best experimental conditions for the detection of the lac dye. The lower detection limit was achieved using nanoparticles prepared by reduction with hydroxylamine, excitation at 514.5 nm, and slightly acidic pH conditions, thus exploiting a combination of factors including lower electrostatic repulsion between dye and nanoparticles and resonance Raman enhancement. A comparison between the adsorption of laccaic acid (LA) and carminic acid (CA), another anthraquinone red dye, was also done, based on the SERS spectra of both dyes. (publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2006-DN-BX-K034


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Award
        Development of Advanced Raman Spectroscopy Methods and Databases for the Evaluation of Trace Evidence and the Examination of Questioned Documents
    
  
  
Date Published: January 1, 2007
    
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