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Nanoparticle Ring Structures based on Protein Assemblies

Published online by Cambridge University Press:  26 February 2011

Silke Behrens,
Wilhelm Habicht,
Kerstin Wagner and
Eberhard Unger
Silke Behrens
Affiliation:
silke.behrens@itc-cpv.fzk.de, Forschungszentrum Karlsruhe, Institut für Technische Chemie, Postfach 3640, Karlsruhe, N/A, 76021, Germany
Wilhelm Habicht
Affiliation:
wilhelm.habicht@itc-cpv.fzk.de
Kerstin Wagner
Affiliation:
rake@imb-jena.de
Eberhard Unger
Affiliation:
eunger@fli-leibniz.de
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Abstract

The bottom-up wet-chemical synthesis of inorganic materials provides tools for generating nanostructures from particles to one-dimensional structures, but these conventional chemical techniques usually offer little control over the deposition of metals or metal particles into nanosized ring structures although interesting properties and applications, e.g., Aharonov-Bohm rings are expected. Our results provide a straightforward and rapid wet-chemical synthesis to ring-like metal particle arrays. Applying appropriate conditions, tubulin dimers, proteins of 4-5 nm diameter and a length of 8 nm, self-assemble by specific recognitions capabilities into defined superstructures. Ca2+ ions, e.g., direct the assembly of tubulin into 50 nm sized, ring-like structures. In our approach, these ring-like protein assemblies serve as a functionalized scaffold where the metal particles are generated in situ and deposited into spiral-shaped particle arrays, reflecting the arrangement of the protein subunits within the assembly. The resulting size and crystalline structure of the materials were examined using transmission electron microscopy and scanning force microscopy.

Keywords

biomimetic (chemical reaction)nanostructuremetal

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