New magnetic nanoparticles for biotechnology

Hütten A, Sudfeld D, Ennen I, Reiss G, Hachmann W, Heinzmann U, Wojczykowski K, Jutzi P, Saikaly W, Thomas G (2004)
JOURNAL OF BIOTECHNOLOGY 112(1-2): 47-63.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Paramagnetic carriers, which are linked to antibodies enable highly specific biological cell separations. With the colloidal synthesis of superparamagnetic Co and FeCo nanocrystals with superior magnetic moments the question about their potential to replace magnetite as the magnetically responsive component of magnetic beads is addressed. Starting from a magnetic analysis of the corresponding magnetophoretic mobility of Co and FeCo based alloys their synthesis and resulting microstructural and magnetic properties as function of the underlying particle size distribution are discussed in detail. The stability of the oleic acid ligand of Co nanocrystals has been investigated. The oxidation kinetics were quantified using magnetic measurements. As a result, this ligand system provides sufficient protection against oxidation. Furthermore, the kinetics of the synthesis of Fe50Co50 nanoparticles has been monitored employing Fourier transform infra red (FT-IR) spectroscopy and is modeled using a consecutive decomposition and growth model. This model predicts the experimentally realized FeCo nanoparticle composition as a function of the particle size fairly well. High-resolution transmission electron microscopy (HRTEM) was performed to uncover the resulting microstructure and composition on a nanometer scale. (C) 2004 Elsevier B.V. All rights reserved.
Stichworte
FT-IR; magnetic particles; high-resolution electron microscopy; absolute magnetic moment measurements
Erscheinungsjahr
2004
Zeitschriftentitel
JOURNAL OF BIOTECHNOLOGY
Band
112
Ausgabe
1-2
Seite(n)
47-63
ISSN
0168-1656
Page URI
https://pub.uni-bielefeld.de/record/1606660

Zitieren

Hütten A, Sudfeld D, Ennen I, et al. New magnetic nanoparticles for biotechnology. JOURNAL OF BIOTECHNOLOGY. 2004;112(1-2):47-63.
Hütten, A., Sudfeld, D., Ennen, I., Reiss, G., Hachmann, W., Heinzmann, U., Wojczykowski, K., et al. (2004). New magnetic nanoparticles for biotechnology. JOURNAL OF BIOTECHNOLOGY, 112(1-2), 47-63. doi:10.1016/j.jbiotec.2004.04.019
Hütten, A., Sudfeld, D., Ennen, I., Reiss, G., Hachmann, W., Heinzmann, U., Wojczykowski, K., Jutzi, P., Saikaly, W., and Thomas, G. (2004). New magnetic nanoparticles for biotechnology. JOURNAL OF BIOTECHNOLOGY 112, 47-63.
Hütten, A., et al., 2004. New magnetic nanoparticles for biotechnology. JOURNAL OF BIOTECHNOLOGY, 112(1-2), p 47-63.
A. Hütten, et al., “New magnetic nanoparticles for biotechnology”, JOURNAL OF BIOTECHNOLOGY, vol. 112, 2004, pp. 47-63.
Hütten, A., Sudfeld, D., Ennen, I., Reiss, G., Hachmann, W., Heinzmann, U., Wojczykowski, K., Jutzi, P., Saikaly, W., Thomas, G.: New magnetic nanoparticles for biotechnology. JOURNAL OF BIOTECHNOLOGY. 112, 47-63 (2004).
Hütten, Andreas, Sudfeld, Daniela, Ennen, Inga, Reiss, Günter, Hachmann, Wiebke, Heinzmann, Ulrich, Wojczykowski, Klaus, Jutzi, Peter, Saikaly, W., and Thomas, G. “New magnetic nanoparticles for biotechnology”. JOURNAL OF BIOTECHNOLOGY 112.1-2 (2004): 47-63.

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