Arrangement of Pigments
The pigments in plants are positioned in antennae complexes to maximize the chain reaction of excited bonds and direct the electrons to a specific molecule.
Zeolites and Titanium Dioxide are used in bio-solar cells to provide a porous matrix that contains and positions the dyes to return electrons. Scientists are working on this component to improve efficient electron movement and dye positioning.
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Picture From: Raven, Peter, Biology of Plants, Worth Publishers Inc., 1998