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Catalytic coating of virus particles with zinc oxide |
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| Authors: | S. Balci M. Schirra R. Sauer A. Kadri H. Jeske |
| Affiliation: | a Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, D-70569 Stuttgart, Germany b Institut für Halbleiterphysik, Universität Ulm, D-89069 Ulm, Germany c Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, D-70569 Stuttgart, Germany d Biologisches Institut, Pfaffenwaldring 57, D-70550 Stuttgart, Germany e Institut du Physique des Nanostructures, Ecole Polytechnique Federale, CH-1015 Lausanne, Switzerland |
| Abstract: | We show that the rod-shaped Tobacco mosaic virus (TMV) can be coated with the wide band gap semiconductor zinc oxide by electroless deposition under mild reaction conditions. The process involves pretreatment with aqueous Pd(II), followed by nucleation of ZnO, directed to palladium centers formed on the surface of TMV. The mechanism is based on the local pH change due to the reduction of nitrate by dimethylamine borane at the palladium. Morphology and chemical composition have been analyzed by transmission electron microscopy (TEM) and by energy filtering TEM, respectively. The optical properties were elucidated by cathodoluminescence, which showed the desired near-band edge emission. |
| Keywords: | Electroless deposition Zinc oxide Tobacco mosaic virus Biotemplate Cathodoluminescence |
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