Melanins is known for providing active photoprotection properties to human skin and eyes.
A well established recent classification comprises :
a) eumelanins, black-to-brown insoluble pigments;
b) pheomelanins, yellow-to-reddish brown;
c) neuromelanins, produced within Substantia nigra neurons;
d) allomelanin, typically found in plants.
Natural and Synthetic eumelanins share the well assessed broadband absorption throughout the entire UV-visible range, a permanent free radical signal behavior, hybrid electronic-ionic conductor behavior, and efficient UV dissipation via excited state Over the past decade melanins and their subunits have attracted increasing interestas soft biocompatible functional materials with antioxidant properties for engineering high performance, low impact optoelectronic devices, such as memory devices, light emitting diodes and field effect transistors.