Journal of Magnetism and Magnetic Materials, Volumes 337–338, July 2013, Pages 53-57.
S.V. Gorobets, Gorobets O. Yu, I.V. Demianenko, R.N. Nikolaenko
National Technical University of Ukraine Kiev Polytechnic Institute 03056, Peremogy st., 37, Kiev, Ukraine
University of Missouri, School of Biological Sciences 5000 Rockhill Rd, Kansas City, MO 64110, United States
Abstract
The compared analyze of four methods of the magnetic nanoparticles clusters parameters estimation were developed and performed, such as, method, which takes into account two magneto-force scans of surface for calculation, geometry distance measurement between two centers of clusters in chains using the functions of NOVA-program, which is the standard computer equipment for scanning probe microscopy SOLVER PRO-M and the model, which takes into account the table meaning of magnetite magnetization and atomic-force microscopy. The magnetically-controllable biosorbent based on the culture of Saccharomyces cerevisiae was used as a model object for adequacy analyze of these models. As the result of the work we get the information about the depth of clusters penetration inside biomembrane, the typical sizes of clusters and the dispersion of magnetic clusters sizes. This analyze shows that all four methods can be used for single magnetic clusters, but for clusters, which lay in chains with small distance between their centers, the mode, which takes into account the table meaning of magnetite magnetization, cannot be used, because this model does not take into account the nearest neighbors contribution of interaction of magnetic fields dipole with magnetic probe.