Hetero-structures formed by quantum-sized ZnO nanocrystals and photosynthetic pigments were prepared by adsorbing either chlorophyll a, carotenoids or their mixture onto a film of organic-capped ZnO nanoparticles. Photoelectrochemical measurements were comparatively performed on both bulk and nanocrystalline ZnO films after dye-covering in order to probe the photosensitization process occurring at the hetero-junction. The photoconversion process was found to be greatly enhanced at the nanocrystalline electrodes upon sensitization with a dye mixture. The sensitization process is discussed on the basis of the aggregation state of chlorophyll a, and of the specific photoprotective action played by carotenoids.
|Titolo:||Photoelectrochemical study on photosynthetic pigments-sensitized nanocrystalline ZnO films|
|Data di pubblicazione:||2004|
|Digital Object Identifier (DOI):||10.1016/j.bioelechem.2003.09.016|
|Appare nelle tipologie:||1.1 Articolo in rivista|