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Bio-inspired syntheses of ZnO-protein composites

  • Luciana Pitta Bauermann , Joachim Bill and Fritz Aldinger
Published/Copyright: May 23, 2013
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Abstract

The influence of five different proteins on the crystallization of ZnO was investigated. The aim was to create bio-inspired artificially-synthesized materials by applying the knowledge acquired about naturally occurring inorganic/bio-organic composites. We found that the lower the isoelectric point of a protein, the more efficient is the adsorption of this protein at ZnO. Thus, electrostatic interaction is the main force responsible for the adsorption between proteins and ZnO. The isoelectric point of the protein does not play any role in the morphology of the ZnO crystallites. Morphology and crystallographic orientation of ZnO crystallites remain practically unaltered when globular proteins are employed during the synthesis. On the other hand, the use of an elongated protein causes a significant increase in the size of the ZnO crystallite. The synthesis under investigation provides a base for the generation of innovative composites with combined properties of ZnO and biological functions of native proteins.


* Correspondence address, Dr. Luciana Pitta Bauermann, Max-Planck-Institut für Metallforschung and, Institut für Nichtmetallische Anorganische Materialien, Universität Stuttgart, Pulvermetallurgisches Laboratorium, Heisenbergstr. 3, D-70569, Stuttgart, Germany, Tel.: +49 711 689 3231, Fax: +49 711 689 3131, E-mail:

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Received: 2006-9-15
Accepted: 2007-6-20
Published Online: 2013-05-23
Published in Print: 2007-09-01

© 2007, Carl Hanser Verlag, München

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