Luminescence of Eu3+ doped calcium hydroxyapatite and tricalcium phosphate nanoparticles
Ilya D. Sidorov1,Ekaterina I. Oleinikova1, Timur M. Minnebaev1, Alexey S. Nizamutdinov1, Maxim S. Pudovkin1, Marat R. Gafurov1, Yuliya O. Nikitina2, Anna Y. Demina2, Natalya V. Petrakova2, Vladimir S. Komlev2; 1Kazan Federal University, Kazan, Russia; 2Federalnoe gosudarstvennoe byudzhetnoe uchrezhdenie nauki "Institut metallurgii imaterialovedeniya im. A.A. Bajkova Rossijskojakademii nauk (IMET RAN)", Moskow, Russia.
Abstract
The development of new materials for prosthetics of injuries of the musculoskeletal system is an urgent task. The use of calcium phosphates, in particular calcium hydroxyapatite (HA) Ca10(PO4)6(OH)2 and tricalcium phosphate (TCP) Ca3(PO4)2, are promising due to correspondence to the mineral composition of the bone.
The aim of this work is to study the spectral-kinetic characteristics of the Eu3+ ion in HA and TCP matrices and the effect of annealing on them at 1300°C in air.
In the luminescence spectrum of HA with Eu3+, the 5D0→7F0 (573.7 nm) and 5D0→7F2 (600–640 nm) transitions make the main contribution. The luminescence lifetime at a wavelength of 573.7 nm and 622.7 nm are 0.63 ms and 0.7 ms respectively. There are significant changes in the width and position of the spectral lines, which may indicate a change in the phase of the sample. After annealing, the luminescence lifetime at a wavelength of 573.7 nm is 0.26 ms; at a wavelength of 622.7 nm, the luminescence decay is two-component with times of 0.32 ms and 1.7 ms.
In the luminescence spectrum of TCP with Eu3+, the 5D0→7F2 transition (600–640 nm) make the main contribution. The decay of luminescence at a wavelength of 622.7 nm is two-component with times of 0.15 ms and 0.98 ms. After annealing, the decay luminescence becomes one-exponential with a time of 1.54 ms, and splitting of the intensity peaks is observed. Apparently, an increase in the quantum yield is observed.
Speaker
Sidorov Ilya
Kazan Federal University
Russia
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