Influence of the synthetic polypeptide c25-mms6 on cobalt ferrite nanoparticle formation

Wolff A, Frese K, Wißbrock M, Eckstädt K, Ennen I, Hetaba W, Loeffler S, Regtmeier A-K, Thomas P, Sewald N, Schattschneider P, et al. (2012)
Journal of Nanoparticle Research 14(10).

Journal Article | Published | English

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Abstract
Nanoparticle syntheses utilizing biomimetic approaches have advanced in recent years. Polypeptides, with their ability to influence inorganic crystal growth, are a topic of great interest. Their effect on the particle formation has not been completely understood yet. Here we report a bioinspired synthesis of cobalt ferrite nanoparticles carried out in vitro under mild conditions using a short, synthetic polypeptide c25-mms6. The influence of c25-mms6 on the nanoparticle formation was investigated by comparing the particles synthesized with the polypeptide to particles synthesized under equivalent conditions without c25-mms6. A separation into D-small,D-av = 10 nm small, superparamagnetic spheres and D-big,D-av = 48 nm disc-like single-domain particles was observed. Non-stoichiometric cobalt ferrite particles with a shape-dependent stoichiometry were produced in the polypeptide-free synthesis. Stoichiometric D-small,D-av = 10 nm CoFe2O4 spheres and D-big,D-av = 60-70 nm Co2FeO4 ferromagnetic discs were obtained in the polypeptide-enhanced synthesis. The results indicate that the polypeptide acts as a catalyst during the multistep biomineralization process and allows the formation of stoichiometric phases which cannot be synthesized at room temperature using conventional bottom-up syntheses.
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Wolff A, Frese K, Wißbrock M, et al. Influence of the synthetic polypeptide c25-mms6 on cobalt ferrite nanoparticle formation. Journal of Nanoparticle Research. 2012;14(10).
Wolff, A., Frese, K., Wißbrock, M., Eckstädt, K., Ennen, I., Hetaba, W., Loeffler, S., et al. (2012). Influence of the synthetic polypeptide c25-mms6 on cobalt ferrite nanoparticle formation. Journal of Nanoparticle Research, 14(10).
Wolff, A., Frese, K., Wißbrock, M., Eckstädt, K., Ennen, I., Hetaba, W., Loeffler, S., Regtmeier, A. - K., Thomas, P., Sewald, N., et al. (2012). Influence of the synthetic polypeptide c25-mms6 on cobalt ferrite nanoparticle formation. Journal of Nanoparticle Research 14.
Wolff, A., et al., 2012. Influence of the synthetic polypeptide c25-mms6 on cobalt ferrite nanoparticle formation. Journal of Nanoparticle Research, 14(10).
A. Wolff, et al., “Influence of the synthetic polypeptide c25-mms6 on cobalt ferrite nanoparticle formation”, Journal of Nanoparticle Research, vol. 14, 2012.
Wolff, A., Frese, K., Wißbrock, M., Eckstädt, K., Ennen, I., Hetaba, W., Loeffler, S., Regtmeier, A.-K., Thomas, P., Sewald, N., Schattschneider, P., Hütten, A.: Influence of the synthetic polypeptide c25-mms6 on cobalt ferrite nanoparticle formation. Journal of Nanoparticle Research. 14, (2012).
Wolff, Annalena, Frese, Katrin, Wißbrock, Marco, Eckstädt, Katrin, Ennen, Inga, Hetaba, Walid, Loeffler, Stefan, Regtmeier, Anna-Kristina, Thomas, Patrick, Sewald, Norbert, Schattschneider, Peter, and Hütten, Andreas. “Influence of the synthetic polypeptide c25-mms6 on cobalt ferrite nanoparticle formation”. Journal of Nanoparticle Research 14.10 (2012).
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