NDLI: Preparation of three-dimensional leaflike cobalt microcrystals and decoration of their surface with silver nanoparticles

Content Provider	Springer Nature Link
Author	Qiao, Ru Zhang, Xiao Li Zhu, Lanlan
Copyright Year	2011
Abstract	Three-dimensional leaflike metallic cobalt microcrystals with radiating arrangement from each individual centers were successfully synthesized via a hydrothermal reduction approach. Time-dependent experiments were carried out to verify the rational growth mechanism of the obtained leaflike products, in which a morphology transformation from cobalt hydroxide hexagonal nanoplates to dendritic cobalt crystals and end with leaflike cobalt products was observed. Structure characterizations suggest that this transformation is associated with diffraction-limited aggregation, oriented attachment, and Ostwald ripening. XRD measurement indicates that the cobalt products exhibit a combination of hexagonal-close-packed (hcp) and face-centered-cubic (fcc) crystalline character. The products exhibit a remarkable enhanced coercivity of 193.8 Oe compared against bulk cobalt due to the shape anisotropy and hcp crystalline structure. The effect of different solvents on morphological and magnetic properties of the product was also validated. These leaflike cobalt crystals were further used as substrates to decorate their surface with Ag nanoparticles by transmetallation reaction. These Ag-modified cobalt leaves could have the potential application value in fields of magnetically recyclable catalysts and antibacterial materials.
Starting Page	3843
Ending Page	3852
Page Count	10
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	13
Issue Number	9
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-03-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Leaflike microstructures Cobalt Growth mechanism Ag-decoration Metallic nanostructures Physical Chemistry Characterization and Evaluation of Materials Inorganic Chemistry Nanotechnology Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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