Review Article
Microanalysis of Organic Pigments in Ancient Textiles by Surface-Enhanced Raman Scattering on Agar Gel Matrices
Figure 5
SERS spectrum (514 nm excitation) of Tyrian purple extracted from a cotton fiber mockup by using an agar gel bead containing the leuco-reduction chemicals (a) and Raman spectrum indigo crystals (b).
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(b) |