Synthesis and Fluorescence Properties of Eu~(2+)-Doped KMgF_3 Nanoparticles

摘要

The phase diagram of a cetyltrimethyl ammonium bromide(CTAB)-butanol-octane/KNO_3-Mg(NO_3)_2 system was drawn.Nanoparticles of Eu~(2+) -doped KMgF_3 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 KMgF_3 cubic phase.The environmental scanning electron microscopic(ESEM) images show the presence of spherical Eu~(2+)-doped KMgF_3 nanoparticles with a diameter of ca.20 nm.The emission of KMgF_3:Eu~(2+) 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 KMgF_3:Eu~(2+) single crystal.The preparation method of nano-KMgF_3:Eu~(2+)/PMMA composite films was inquired into.