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Hierarchical Assembly of Sm2Co7/Co Magnetic Nanoparticles into Highly Stable and Uniform Nanospheres

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Abstract:

Hierarchical assembly of colloidal Sm2Co7/Co clusters in the form of nanospheres has been processed through a polyol process. The SmCo nanospheres are found to be robust, uniform (∼100 nm) and tend to self-assemble in the form of ordered superstructures. Each nanosphere consists of large number of discrete fine particles (∼6.0 nm), having two-phase structure of both Sm2Co7 and Co-phases. Upon annealing, these phases transform into Sm2Co17 phase with very high magnetization (169 emu/g). A possible mechanism on the formation of nanospheres from the individual Sm2Co7 and Co nanoparticles is also discussed.

Keywords: MAGNETIC NANOPARTICLES; NANOSPHERES; POLYOL PROCESS; SELF-ASSEMBLY; SM-CO; SPHERICAL AGGREGATES

Document Type: Short Communication

DOI: http://dx.doi.org/10.1166/jnn.2011.3819

Publication date: April 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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