@article {18819,
	title = {Structural, UV-VIS-NIR luminescence and decay associated spectral profiles of Sm 3 doped calcium phosphate glass},
	journal = {Advanced Materials Letters},
	volume = {7},
	year = {2016},
	month = {2016-05-25 00:00:00},
	pages = {702-707},
	publisher = {VBRI Press},
	abstract = {

Rare-Earths or Lanthanide ions (Ln3+) are a group of elements from lanthanum to lutetium (Z=57 to 71), plus scandium (Z=21) and Yttrium (Z=39). Ln3+ doped glasses have been included within the Hydroxyapatite (HA) matrix, inducing promising changes in their physicochemical and biological properties. Because of the lanthanides{\textquoteright} ability to modulate bone metabolism, inclusion of Ln3+ in the composition of calcium phosphate biomaterials for bone tissue regeneration has been considered. Earlier, the authors studied Samarium (Sm3+) doped glass-reinforced hydroxyapatite with enhanced osteoblastic performance and antibacterial properties for bone tissue regeneration. Moreover, Sm3+ substituted calcium phosphate is a non-hazardous material that luminesces under UV-visible light. In this work, we study a calcium phosphate host glass doped with samarium oxide, which has been prepared and characterized by FTIR, SEM, EDS analysis, and X-ray mapping. Pumping with two visible excitation sources at 405nm and 423nm, we observed intense, sharp Green, yellow, orange emission peaks (4G5/2{\textrightarrow}6H5/2,7/2, 9/2) at 560nm, 596nm and 643nm respectively. A weak red emission was also observed at 704nm. Two NIR peaks at 1134nm (4G5/2{\textrightarrow}6F11/2) and 1310 nm (4G5/2{\textrightarrow}6F9/2) are monitored by using an excitation at 1060nm. Furthermore, by making use of time-resolved emission spectroscopy (TRES) measurements, the decay associated spectra were obtained allowing the kinetic parameters for the different emission bands to be elucidated and compared with steady state emission spectra.

}, keywords = {glasses, luminescence}, issn = {0976-3961}, doi = {10.5185/amlett.2016.6244}, author = {Nandyala, S. H. and Hungerford, G. and Rao, J. L. and Leonor, I. B. and Pires, R. A. and Reis, R. L.} }

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