Radiative relaxation quantum yields for synthetic eumelanin.

  title={Radiative relaxation quantum yields for synthetic eumelanin.},
  author={Paul Meredith and Jennifer Riesz},
  journal={Photochemistry and photobiology},
  volume={79 2},
We report absolute values for the radiative relaxation quantum yield of synthetic eumelanin as a function of excitation energy. These values were determined by correcting for pump beam attenuation and emission reabsorption in both eumelanin samples and fluorescein standards over a large range of concentrations. Our results confirm that eumelanins are capable of dissipating >99.9% of absorbed UV and visible radiation through nonradiative means. Furthermore, we have found that the radiative… CONTINUE READING
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