Chainlike assembly of magnetite coated with SiO{sub 2} nanostructures induced by an applied magnetic field

Journal Article · Tue May 06 00:00:00 EDT 2008 · Materials Research Bulletin

OSTI ID:21144007

Mingzai, Wu ^[1]; Yongqing, Ma; Yanmei, Liu ^[1]; Hong, Bi ^[2]; Qingqing, Fang ^[1]; Helin, Niu ^[2]; Qianwang, Chen ^[3]

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1. Key Laboratory of Opto-Electronic Information Acquisition and Manipulation (Ministry of Education), School of Physics and Materials Science, Anhui University, Hefei 230039 (China)
2. School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039 (China)
3. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026 (China)

The assembly of silica coated magnetite nanoparticles into chainlike nanostructures is reported in the presence of applied magnetic field. The coating of SiO{sub 2} onto the surface of magnetite nanoparticles was successfully conducted with the hydrolysis and condensation of tetraethyl orthosilicate. X-ray diffraction and transmission electron microscopy were used to characterize the microstructure and morphology. Vibrating sample magnetometry reveals that the coercivity is dependent on the coating thickness and can be controlled to a certain extent.

• OSTI ID: 21144007
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 5 Vol. 43; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COERCIVE FORCE
HYDROLYSIS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETITE
MICROSTRUCTURE
NANOSTRUCTURES
PARTICLES
SILICA
SILICATES
SILICON OXIDES
SOL-GEL PROCESS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION