Single crystal flower-like magnetite nanoparticles (NPs) were formed by thermal decomposition of iron acetylacetonate in the presence of polyphenylenepyridyl dendrons and dendrimers at 290 C. The size of the flower-like NPs varies in the range12-31 nm depending on the dendron/dendrimer structure and concentration. The 21 nm flower-like NPs demonstrate unusual magnetic properties with a blocking temperature of 300 K, revealing ferromagnetism at room temperature. Such unusual NP morphology is attributed to self-assembling of dendrons and dendrimers in solution which was studied using small angle X-ray scattering. The degree of self-assembling is dependent on the dendron/dendrimer structure and concentration. The financial support of this work was provided in part by funding from the European Community's Seventh Framework Programme [FP7/2007-2013] under grant agreement no. CP-IP 246095 and the Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah, under grant no.(GR-33-7).

Flower-like iron oxide nanoparticles grown in polyphenylenepyridyl dendron/dendrimer solutions

246th National Meeting (2013)

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