Van Hoang Nhu, Tam Phuong Dinh, Kien Nguyen Duc Trung, Huy Pham Thanh, Pham Vuong-Hung
Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), No. 01, Dai Co Viet Road, Hanoi, Vietnam.
Luminescence. 2017 Aug;32(5):817-823. doi: 10.1002/bio.3257. Epub 2016 Dec 28.
This paper reports a novel way for the synthesis of a europium (Eu)-doped fluor-hydroxyapatite (FHA) nanostructure to control the luminescence of hydroxyapatite nanophosphor, particularly, by applying optimum fluorine concentrations, annealed temperatures and pH value. The Eu-doped FHA was made using the co-precipitation method followed by thermal annealing in air and reducing in a H atmosphere to control the visible light emission center of the nanophosphors. The intensities of the OH group decreased with the increasing fluorine concentrations. For the specimens annealed in air, the light emission center of the nanophosphor was 615 nm, which was emission from the Eu ion. However, when they were annealed in reduced gas (Ar + 5% H ), a 448 nm light emission center from the Eu ion of FHA was observed. The presence of fluorine in Eu-doped FHA resulted in a significant enhancement of nanophosphor luminescence, which has potential application in light emission and nanomedicine.
本文报道了一种合成铕（Eu）掺杂氟羟基磷灰石（FHA）纳米结构的新方法，特别是通过应用最佳氟浓度、退火温度和pH值来控制羟基磷灰石纳米磷光体的发光。采用共沉淀法制备Eu掺杂的FHA，然后在空气中进行热退火，并在H气氛中还原，以控制纳米磷光体的可见光发射中心。随着氟浓度的增加，OH基团的强度降低。对于在空气中退火的样品，纳米磷光体的发光中心为615nm，这是Eu离子的发射。然而，当它们在还原气体（Ar + 5% H）中退火时，观察到FHA的Eu离子有448nm的发光中心。Eu掺杂FHA中氟的存在导致纳米磷光体发光显著增强，这在发光和纳米医学方面具有潜在应用。
