Make Your Own Oil Paint!

Hi Everyone,

The end goal of my summer research was to prepare a comprehensive library of SERS spectra for the many possible plant sources of organic yellow dyes and pigments.  Once I tested the water soluble, cooperative dyes and extracted the insoluble pigments, the next step was to test oil paints.  As the pigments and dyes would be found on a painting mixed with an oil binder, the best simulation of an art sample would be to take SERS spectra of oil paints made from the yellows I have been testing.

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Why are the trees blue?

Hello Everyone!

Over the past few weeks I have been working towards perfecting a procedure to simulate surface enhanced Raman spectroscopy of an organic yellow art sample.  Many organic yellow dyes produce beautiful SERS spectra with the traditional procedure, involving the coating of a minute sample with centrifuged silver nanoparticles and shooting a laser beam directly onto the particle.  However, lake pigments involve the mordanting of a dye with an inorganic binding medium, making it difficult for the silver nanoparticles to interact properly with the surface of the dye molecules and produce accurate spectra.

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