Preparation of europium(III)-doped hydroxyapatite nanocrystals in the presence of cationic surfactant

Add time:09/26/2019    Source:infona.pl

Europium (III) (Eu3+)-doped hydroxyapatite (HAp) nanocrystals were synthesized in the presence of a cetyltrimethylammonium bromide (CTAB) to investigate the states of Eu3+ ions in the structure. The HAp structure was preserved with the doping as well as the CTAB existence, and the carbonate ions were included in the structure. The uniform shapes and mono-dispersion of the nanocrystals were observed by adding CTAB. The transitions of 5D0–7F1 and 5D0–7F2 in the photoluminescence spectra indicated the presence of the Eu3+ in an environment of a low symmetry before the calcination. The Eu3+ was effectively positioned in the Ca sites in the HAp structure. The CTAB addition would prevent the Eu3+ ions from aggregating each other, inducing the effective substitution and resultantly showing the efficient luminescence. Therefore, the interactions between the Eu3+ ions and HAp structure were successfully enhanced in the presence of CTAB.

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