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Sub 5 nm Fe3O4 nanocrystals via coprecipitation method
- Authors
- Wu, Jun Hua; Ko, Seung Pil; Liu, Hong Ling; Jung, Myung-Hwa; Lee, Ju Hun; Ju, Jae-Seon; Kim, Young Keun
- Issue Date
- 1-2월-2008
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- nanocrystals; magnetite; magnetic; superparamagnetic
- Citation
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.313, pp.268 - 272
- Indexed
- SCIE
SCOPUS
- Volume
- 313
- Start Page
- 268
- End Page
- 272
- ISSN
- 0927-7757
- Abstract
- Magnetite nanocrystals of 2-4 nm were synthesized by a chemical coprecipitation method, by which the particle size was controlled by the reaction temperature. The nanocrystals were investigated by XRD, TEM/HRTEM, VSM and SQUID. It is found that the nanocrystals reveal well-defined superparamagnetic behavior before and after annealing, while the observation of the distinct lattices manifest the high crystallinity of the ultrasmall particles. (C) 2007 Elsevier B.V. All rights reserved.
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