TY - GEN
T1 - Synthesis and characterization of wet chemically derived magnetite-hap hybrid nanoparticles
AU - Hayakawa, S.
AU - Tsuru, K.
AU - Matsumoto, A.
AU - Osaka, A.
AU - Fujii, E.
AU - Kawabata, K.
PY - 2010/5/13
Y1 - 2010/5/13
N2 - A new type of hyperthermia or magnetic resonance imaging materials with bone-bonding ability was explored within the framework of magnetic-bone mineral composite ceramics. That is, hydroxyapatite (HAp) nanoparticles, hybridized with ferrous (Fe2+) and ferric (Fe3+) ions (Fe(II) and Fe(III)), were synthesized through the wet chemical procedure, and characterized in terms of crystal structures, magnetic properties and protein adsorption properties. The as-synthesized particles derived from precursor solutions with FeCl2 consisted of hydroxyapatite (JCPDS 09-0432) (20-30 nm in size) and magnetite (JCPDS 19-0629) (2-5 nm in size). They showed super-paramagnetic behavior, yet their saturation magnetization increased with the content of Fe(II) in the solutions up to 4.3 emu/g. From TEM observations, the HAp particles were rod-like, by which the magnetite particles that seemed spherical rather than showing cubic morphology, were surrounded. The particles from the solutions with Fe(III) gave only HAp, and hence Fe(III) was considered to form an amorphous phase. Moreover, Fe(III) incorporation suppressed HAp crystal growth.
AB - A new type of hyperthermia or magnetic resonance imaging materials with bone-bonding ability was explored within the framework of magnetic-bone mineral composite ceramics. That is, hydroxyapatite (HAp) nanoparticles, hybridized with ferrous (Fe2+) and ferric (Fe3+) ions (Fe(II) and Fe(III)), were synthesized through the wet chemical procedure, and characterized in terms of crystal structures, magnetic properties and protein adsorption properties. The as-synthesized particles derived from precursor solutions with FeCl2 consisted of hydroxyapatite (JCPDS 09-0432) (20-30 nm in size) and magnetite (JCPDS 19-0629) (2-5 nm in size). They showed super-paramagnetic behavior, yet their saturation magnetization increased with the content of Fe(II) in the solutions up to 4.3 emu/g. From TEM observations, the HAp particles were rod-like, by which the magnetite particles that seemed spherical rather than showing cubic morphology, were surrounded. The particles from the solutions with Fe(III) gave only HAp, and hence Fe(III) was considered to form an amorphous phase. Moreover, Fe(III) incorporation suppressed HAp crystal growth.
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M3 - Conference contribution
AN - SCOPUS:77952002960
SN - 9780470457566
T3 - Ceramic Engineering and Science Proceedings
SP - 105
EP - 112
BT - Advances in Bioceramics and Porous Ceramics II - A Collection of Papers Presented at the 33rd International Conference on Advanced Ceramics and Composites
T2 - Advances in Bioceramics and Porous Ceramics II - 33rd International Conference on Advanced Ceramics and Composites
Y2 - 18 January 2009 through 23 January 2009
ER -