Photoelectrochemical study on photosynthetic pigments-sensitized nanocrystalline ZnO films

被引：20

作者：

Petrella, A ^{[1
]}

Cozzoli, PD ^{[1
]}

Curri, ML ^{[1
]}

Striccoli, M ^{[1
]}

Cosma, P ^{[1
]}

Agostiano, A ^{[1
]}

机构：

[1] Univ Bari, Dipartmento Chim, CNR, IPCF Sez Bari, I-70126 Bari, Italy

来源：

BIOELECTROCHEMISTRY | 2004年 / 63卷 / 1-2期

关键词：

dye-sensitized film; colloidal nanocrystals; ZnO; chlorophyll a; carotenoids; photoactivity;

D O I：

10.1016/j.bioelechem.2003.09.016

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：99 / 102

页数：4

共 15 条

[1] Fluorescence and photoelectrochemical behavior of chlorophyll a adsorbed on a nanocrystalline SnO2 film [J].