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Issue 11, 2013
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Solid-state phase transformation mechanism for formation of magnetic multi-granule nanoclusters

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Abstract

Magnetic multi-granule nanoclusters (MGNCs) were easily formed by the simple reaction of FeCl3 in ethylene glycol, which served as both the solvent and reductant, in the presence of sodium acetate. Simple refluxing within glassware at atmospheric pressure allowed us to monitor changes in the color of reaction mixtures and isolate intermediates to be characterized. On the basis of these observations, we could suggest a new mechanism of solid-state phase transformation after the hydrolysis/condensation of FeCl3 along with the partial reduction of Fe3+ to Fe2+ by ethylene glycol. The size of MGNCs could be precisely and reproducibly controlled from 50 to 500 nm by varying the reaction conditions. These MGNCs exhibited relatively high MS values of 73ā€“85 emu gāˆ’1 and ferrimagnetic properties, but they were stably dispersed in the solution via a strong interaction between solvent molecules and surface functional groups; this interaction overcame the magnetic interactions between particles that caused the formation of aggregates.

Graphical abstract: Solid-state phase transformation mechanism for formation of magnetic multi-granule nanoclusters

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The article was received on 01 Aug 2012, accepted on 09 Jan 2013 and first published on 10 Jan 2013


Article type: Paper
DOI: 10.1039/C3RA21639J
Citation: RSC Adv., 2013,3, 3631-3637
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    Solid-state phase transformation mechanism for formation of magnetic multi-granule nanoclusters

    J. Cha, J. S. Lee, S. J. Yoon, Y. K. Kim and J. Lee, RSC Adv., 2013, 3, 3631
    DOI: 10.1039/C3RA21639J

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