Applications of Raman spectroscopy in archaeometry : An investigation of pre-Columbian Peruvian textiles

In this work bers from pre-Columbian Peruvian textiles and synthetic analogs of the natural dyes previously found in Andean historical textiles (indigo, carmine, indigo carmine, purpurin, alizarin and luteolin) were analyzed using a Raman microscope which was also used as a microspectro uorimeter. SEM-EDS and FTIR were used as complimentary techniques. The ef ciency of HNO3 etched copper surface as SERS substrates was investigated aiming at its application in archaeometry; in this particular case, the capability of such SERS active substrate to cope with luminescence presented by the dyed textile was evaluated.The archaeological bers were identi ed as dyed wool by FTIR, FT-Raman and SEM; the red dye (carmine) was identi ed by resonance Raman and SERS, however, the blue dyed ber presented a strong uorescent background in the visible and, in the NIR, the FT-Raman spectrum was not conclusive, therefore the identi cation was performed using SERS through the dye in-situ reduction on a Cu etched disk.Speci cally in the case of synthetic dyes, although all of them had already their SERS spectra reported in the literature, it is here shown that the copper etched surfaces provide SERS and SERRS information that are in full agreement with previously reported data, with the advantage of a much simpler and faster preparation. Do you want to read the rest of this article? Request full-text Share 1st N.D. Bernardino 2nd D.L.A. de Faria 3rd A.C.V. Negrón 0 Citations 46 References Read Surface-Enhanced Vibrational Spectroscopy [Show abstract] Article · Sep 2007 · Scienti c Reports Ricardo F Aroca Read Quantitative Fourier Transform Infrared Spectroscopy of Oxidised Hair [Show abstract] Article · Jan 1985 J. Strassburger M.M. Breuer or Search for publications, researchers, or questions Discover by subject area Join for free Log in