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ACS Appl Mater Interfaces. 2009 Sep;1(9):1847-51. doi: 10.1021/am9003864.

Magnetically responsive calcium carbonate microcrystals.

Author information

1
Department of Biochemistry, Kazan State University, Kreml urami 18, Kazan 420008, Republic of Tatarstan. kazanbio@gmail.com

Abstract

Here we report the fabrication of magnetically responsive calcium carbonate microcrystals produced by coprecipitation of calcium carbonate in the presence of citrate-stabilized iron oxide nanoparticles. We demonstrate that the calcite microcrystals obtained possess superparamagnetic properties due to incorporated magnetite nanoparticles and can be manipulated by an external magnetic field. The microcrystals doped with magnetic nanoparticles were utilized as templates for the fabrication of hollow polyelectrolyte microcapsules, which retain the magnetic properties of the sacrificial cores and might be spatially manipulated using a permanent magnet, thus providing the magnetic-field-facilitated delivery and separation of materials templated on magnetically responsive calcite microcrystals.

PMID:
20355803
DOI:
10.1021/am9003864
[Indexed for MEDLINE]

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