Synthesis and Fluorescence Properties of Eu2+-Doped KMgF3 Nanoparticles1

The phase diagram of a cetyltrimethyl ammonium bromide (CTAB)/n-butanol/n-octane/KNO3-Mg(NO3)2 system was drawn. Nanoparticles of Eu2+-doped KMgF3 were prepared from the quaternary microemulsions of cetyltrimethyl ammonium bromide (CTAB), n-butanol, n-octane and water. The X-ray diffraction (XRD) patterns were indexed to a pure KMgF3 cubic phase. The environmental scanning electron microscopic (ESEM) images show the presence of spherical Eu2+-doped KMgF3 nanoparticles with a diameter of ca. 20 nm. The emission of KMgF3:Eu2+ nanoparticles peaks at 360 nm. The excitation band was observed at 250 nm with a blue shift of ca. 70 nm compared with that of KMgF3:Eu2+ single crystal. The preparation method of nano-KMgF3:Eu2+/PMMA composite films was inquired into.