Magnetic properties of Fe3O4 nanoparticles encapsulated with poly(D,L lactide-Co-glycolide)
Magnetic properties of Fe3O4 nanoparticles encapsulated with poly(D,L lactide-Co-glycolide)
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DOI：
10.1109/tmag.2004.829265
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发表时间：
2004-07-01
影响因子：
2.1
通讯作者：
Shin, SC
中科院分区：
文献类型：
--
作者：
Jeong, JR;Lee, SJ;Shin, SC
We have investigated the magnetic properties of Fe3O4 nanoparticles encapsulated with poly(D,L lactide-Co-glycolide) (PLGA) prepared by an emulsification-diffusion technique. The size of nanoparticles was reduced down to 90 nm through the optimization of the preparation condition such as homogenizer and agitator speed. Zero-field-cooled (ZFC)/field-cooled (FC) magnetization, magnetic hysteresis, and relaxation measurement were performed using a superconducting quantum interference device (SQUID) magnetometer from 5 K to 300 K to investigate the magnetic properties of nanoparticles. The SQUID measurements show superparamagnetism of nanoparticles with a blocking temperature of 120 K. By measuring the magnetic relaxation of the magnetization at 5 K, we obtained magnetic viscosity of PLGA-encapsulated Fe3O4 nanoparticles.
