caa a22 4500 46322454X CHVBK 20180405153222.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10853-006-0536-3 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0536-3 Production and characterization of pure and Cr3+-doped hydroxyapatite for biomedical applications as fluorescent probes [Elektronische Daten] [Tatiana de Araujo, Zélia Macedo, Petrus de Oliveira, Mário Valerio] Pure and Cr3+-doped hydroxyapatite (HAP) were prepared via chemical precipitation route. The XRD measurements revealed that the typical HAP powder pattern was obtained. SEM analysis indicated that aggregates of nanoparticles were formed. EDX analysis indicates that the [Ca]/[P] concentration ratio was higher than the expected values but can be explained by the presence of carbonate groups as dopants. The optical absorption spectra of the doped samples presented absorption bands typical of Cr3+ occupying to different crystalline sites. From the position of the bands, it was possible to estimate the crystal field parameters for both sites of Cr3+ in the HAP matrix. The emission spectra of the Cr-doped samples were also investigated and typical transitions of the dopant ion, in trivalent state, were identified. The potential use of the Cr3+-HAP as fluorescent probes for medical applications was discussed. Springer Science+Business Media, LLC, 2007 de Araujo Tatiana Departamento de Física-DFI, Universidade Federal de Sergipe, Campus Universitário, CEP 49100-000, Sao Cristovao, SE, Brasil aut Macedo Zélia Departamento de Física-DFI, Universidade Federal de Sergipe, Campus Universitário, CEP 49100-000, Sao Cristovao, SE, Brasil aut de Oliveira Petrus Departamento de Química Fundamental-DQF, Universidade Federal de Pernambuco, Av Prof. Luiz Freire s/n, CEP 50670-901, Recife, PE, Brasil aut Valerio Mário Departamento de Física-DFI, Universidade Federal de Sergipe, Campus Universitário, CEP 49100-000, Sao Cristovao, SE, Brasil aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/7(2007-04-01), 2236-2243 0022-2461 42:7<2236 2007 42 10853 https://doi.org/10.1007/s10853-006-0536-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0536-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Araujo Tatiana Departamento de Física-DFI, Universidade Federal de Sergipe, Campus Universitário, CEP 49100-000, Sao Cristovao, SE, Brasil aut NATIONALLICENCE 700 1- Macedo Zélia Departamento de Física-DFI, Universidade Federal de Sergipe, Campus Universitário, CEP 49100-000, Sao Cristovao, SE, Brasil aut NATIONALLICENCE 700 1- de Oliveira Petrus Departamento de Química Fundamental-DQF, Universidade Federal de Pernambuco, Av Prof. Luiz Freire s/n, CEP 50670-901, Recife, PE, Brasil aut NATIONALLICENCE 700 1- Valerio Mário Departamento de Física-DFI, Universidade Federal de Sergipe, Campus Universitário, CEP 49100-000, Sao Cristovao, SE, Brasil aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/7(2007-04-01), 2236-2243 0022-2461 42:7<2236 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer