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Size and shape control for water-soluble magnetic cobalt nanoparticles using polymer ligands
作者:Lu, Le Trong; Tung, Le Duc; Robinson, Ian; Ung, Diane; Tan, Bien; Long, James; Cooper, Andrew Ian; F
關(guān)鍵字:Nanoparticles
論文來源:期刊
具體來源:Journal of Materials Chemistry (2008), 18(21), 2453-2458.
發(fā)表時間:2008年

We report a synthesis of monodisperse water-sol. magnetic Co nanoparticles using a facile redn. method in aq. media in the presence of alkyl thioether end-functionalized poly(methacrylic acid) (PMAA-DDT) ligands.  The size and shape of the nanoparticles are both tunable by varying synthesis conditions.  The size of the spherical nanoparticles can be tuned between 2-7.5 nm by changing the concn. of the polymer.  Our synthesis approach also provides a route for producing much larger spherical nanoparticles of 80 nm as well as anisotropic nanorods of 15  36 nm.  The spherical nanoparticles are superparamagnetic at room temp.  The nanoparticles can be stable in water for up to eight weeks when 0.12 mM PMAA-DTT with mol. wt. of 13500 g mol-1 is used as ligand. 

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