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Preparation of Magnetic Iron Oxide Nanoparticles for Hyperthermia of Cancer in a FeCl2-NaNO3-NaOH Aqueous System
被引:32
|作者:
Li, Zhixia
[1
]
Kawashita, Masakazu
[1
]
Araki, Norio
[2
]
Mitsumori, Michihide
[3
]
Hiraoka, Masahiro
[3
]
Doi, Masaaki
[4
]
机构:
[1] Tohoku Univ, Grad Sch Biomed Engn, Sendai, Miyagi 9808579, Japan
[2] Kyoto Med Ctr, Natl Hosp Org, Kyoto 6128555, Japan
[3] Kyoto Univ, Grad Sch Med, Kyoto 6068507, Japan
[4] Tohoku Univ, Grad Sch Engn, Sendai, Miyagi 9808579, Japan
关键词:
magnetic iron oxide nanoparticles;
oxidation-precipitation;
initial molecular ratio of reactant;
heating efficiency;
hyperthermia of cancer;
SOLID-STATE SYNTHESIS;
MRI CONTRAST AGENT;
GREEN-RUST;
FE3O4;
NANOPARTICLES;
FERROUS HYDROXIDE;
PRECIPITATION;
MECHANISM;
FUNCTIONALIZATION;
TEMPERATURE;
REDUCTION;
D O I:
10.1177/0885328209351136
中图分类号:
R318 [生物医学工程];
学科分类号:
0831 ;
摘要:
Magnetic iron oxide nanoparticles (MIONPs) were synthesized in a FeCl2-NaNO3-NaOH aqueous system under various initial Fe2+/NO3- molar ratios (alpha) and Fe2+/OH- molar ratios (beta) in order to clarify the effects of the initial molar ratio of reactants on the reaction mechanism. The Fe2+/NO3-/OH- molar ratio of 3 : 1 : 5 led to the formation of magnetic nanoparticles mainly composed of magnetite (Fe3O4) and maghemite (gamma-Fe2O3). The 36 nm sized gamma-Fe2O3 and 413 nm sized Fe3O4 were obtained by changing the order in which NaNO3 was added to a NaOH solution. The in vitro heat generations of the resulting MIONPs in an agar phantom were measured under an alternating magnetic field (100 kHz, 23.9 kA/m). The temperature rise (Delta T) of the agar phantom for the 36 nm sized gamma-Fe2O3 was 55 degrees C in the first 140 s, with a concentration of 58 mg Fe/mL. Our results showed that it is possible to prepare MIONPs with high heating efficiencies under optimal conditions using the present method.
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页码:643 / 661
页数:19
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