Synthesis and Magnetic Properties of Surface Coated Magnetite Superparamagentic Nanoparticles
- Title
- Synthesis and Magnetic Properties of Surface Coated Magnetite Superparamagentic Nanoparticles
- Author
- 좌용호
- Keywords
- Magnetic particle; magnetite; magnetization; polymer; superparamagnetic
- Issue Date
- 2008-11
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Citation
- IEEE TRANSACTIONS ON MAGNETICS, v. 44, No. 11, Page. 2940-2943
- Abstract
- The magnetite superparamagnetic nanoparticles were synthesized by using a co-precipitation method. The surfaces of magnetite nanoparticles were modified by carboxylic acid group of poly (3-thiophenacetic acid). The crystalline structure and the composition of core magnetite nanoparticles were not changed after surface coating with a very thin outer shell of carboxylic-acid group. The magnetite and the surface-coated magnetite particles were well monodispersed. The diameters of the nanoparticles were about 10.4 nm and 12 nm, respectively, determined by using transmission electron microscopy and dynamic light scattering method. The superparamagnetic behaviors were examined by measuring magnetization hysteresis loops and zero-field cooling and field cooling magnetizations as a function of temperature from 5 K to 300 K. The blocking temperatures of the magnetite and the surface coated magnetite were around 245 K and 220 K, respectively. The superparamagnetic behaviors of the magnetite and the surface coated magnetite nanoparticles were discussed in the context of the change of magnetizations with temperature.
- URI
- https://ieeexplore.ieee.org/abstract/document/4717512https://repository.hanyang.ac.kr/handle/20.500.11754/80734
- ISSN
- 0018-9464
- DOI
- 10.1109/TMAG.2008.2001340
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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