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- Title
Assembled β-Co(OH) Nanoparticles on Reduced Graphene Oxide for Enhanced Magnetism.
- Authors
Liu, Feng; Ye, Shuangli; Guo, Huijin; Zhai, Min; Qian, Jun
- Abstract
A simple and effective method has been developed to assemble the β-Co(OH) nanoparticles coordinated to the surface of the reduced graphene oxide sheets. The reduced graphene oxide-Co(OH) hybrid is characterized by transmission electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy techniques, respectively. These morphological and structural analysis results demonstrate the successful attachment of hexagonal β-Co(OH) nanoparticles to the reduced graphene oxide sheets through the oxygen-containing functional groups. Compared to the paramagnetic property of hexagonal β-Co(OH) nanoparticles, a s-like superparamagnetic behavior can be observed at room temperature for the reduced graphene oxide-Co(OH) hybrid by the magnetometer PPMS-9T magnetic measurement, indicative of superparamagnetism. The interplay between the localized magnetic moment of the Co ions in the hexagonal β-Co(OH) nanoparticles and the itinerant π carriers in reduced graphene oxide is suggested to be responsible for this superparamagnetic behavior. This enhanced magnetism indicates that the reduced graphene oxide-Co(OH) hybrid has a promising potential for spintronic device applications.
- Subjects
NANOPARTICLES; GRAPHENE oxide; TRANSMISSION electron microscopy; X-ray diffraction; FOURIER transform infrared spectroscopy techniques; PARAMAGNETISM
- Publication
Journal of Superconductivity & Novel Magnetism, 2014, Vol 27, Issue 3, p787
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-013-2354-6