Final Thoughts

Hello Everyone!

Reflecting on my research goals for the summer, I have now completed a library of spectra with surface enhanced Raman spectroscopy of a collection of organic yellow dyes and pigments.  Now, I could hypothetically identify an unknown organic yellow colorant in a historical oil painting by sampling only a fraction of what would be needed for other, less sensitive techniques.  The only dye I was not able to identify with SERS was gamboge, which is made of a resinous material that is insoluble and very difficult to work with.  However, gamboge was frequently used in historical paintings, so it is important that I am able to develop a pre-treatment strategy that works for it in the future.  So far I have been able to solubilize it in a solution of ethanol and water, but this treatment has not yielded clearer spectra so far.

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