One‐Step Synthesis of Luminescent Nanoparticles of Complex Oxide, Strontium Aluminate - Progress in Nanotechnology - Wiley Online Library

An organic aqueous solution of metal acetylacetonate precursors was subjected to spray pyrolysis in order to fabricate SrAl204:Eu (SAO) nanoparticles. Non-agglomerated luminescent SAO nanoparticles, having a spherical shape with a size of 10-30 nm, were achieved in a single step, while only submi-crometer-sized SAO particles obtained from the conventional ultrasonic pyrolysis of the metal nitrates. Without any post-annealing process, the as-prepared SAO nanoparticles were observed to exhibit a strong photoluminescence, which is comparable with that of the submicrometer-sized SAO particles. A mechanism for the formation of the nanoparticles is discussed in this chapter. The chapter demonstrates an effective method to prepare non-agglomerated luminescent strontium aluminate nanoparticles without post-annealing, although the elucidation of the formation mechanism of the nanoparticles in the present process requires further experimental and theoretical studies.

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