ИСТИНА

Single crystal flower-​like magnetite nanoparticles (NPs) were formed by thermal decompn. 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 concn. The 21 nm flower-​like NPs demonstrate unusual magnetic properties with a blocking temp. of 300 K, revealing ferromagnetism at room temp. Such unusual NP morphol. is attributed to self-​assembling of dendrons and dendrimers in soln. which was studied using small angle X-​ray scattering. The degree of self-​assembling is dependent on the dendron​/dendrimer structure and concn.