Assembly and Charge Transfer in Hybrid TiO2 Architectures Using Biotin−Avidin as a Connector

Exploiting the presence of undercoordinated surface Ti atoms at the tips of TiO2 nanorods and the dopamine selectivity for these Ti surface states, biotin was conjugated to TiO2 nanocrystallites using dopamine as a bridging linker. Using abiotin−avidin complex as a connector the “tip-to-tip” assembl...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2005-02, Vol.127 (5), p.1344-1345
Main Authors: Dimitrijevic, Nada M, Saponjic, Zoran V, Rabatic, Bryan M, Rajh, Tijana
Format: Article
Language:English
Subjects:
Biological and medical sciences
Disperse state. Micelles
Fundamental and applied biological sciences. Psychology
Molecular biophysics
Physico-chemical properties of biomolecules
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Summary:Exploiting the presence of undercoordinated surface Ti atoms at the tips of TiO2 nanorods and the dopamine selectivity for these Ti surface states, biotin was conjugated to TiO2 nanocrystallites using dopamine as a bridging linker. Using abiotin−avidin complex as a connector the “tip-to-tip” assembly of 400 nm elongated TiO2 rods was obtained. The photoexcitation of avidin−TiO2 hybrids resulted in the transfer of holes from nanocrystallites to protein and consequent oxidation of avidin, most probably at tyrosine 33.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja0458118