Biocompatible Er, Yb co-doped fluoroapatite upconversion nanoparticles for imaging applications

Anjana R.; Kurias K. M.; Jayaraj M. K.

doi:10.1117/12.2274772

28 August 2017 Biocompatible Er, Yb co-doped fluoroapatite upconversion nanoparticles for imaging applications

Anjana R., Kurias K. M., Jayaraj M. K.

Proceedings Volume 10344, Nanophotonic Materials XIV; 103440U (2017) https://doi.org/10.1117/12.2274772
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

Abstract

Upconversion luminescence, visible emission on infra red (IR) excitation was achieved in a biocompatible material, fluoroapatite. Fluoroapatite crystals are well known biomaterials, which is a component of tooth enamel. Also it can be considered as an excellent host material for lanthanide doping since the ionic radii of lanthanide is similar to that of calcium ion(Ca²⁺) hence successful incorporation of dopants within the lattice is possible. Erbium (Er), Ytterbium (Yb) co-doped fluorapatite (FAp) nanoparticles were prepared by precipitation method. The particles show intense visible emission when excited with 980 nm laser. Since upconversion luminescence is a multiphoton process the excitation power dependence on emission will give number of photons involved in the emission of single photon. Excitation power dependence studies show that two photons are involved in the emission of single photons. The value of slope was different for different emission peak because of the difference in intermediate energy level involved. The crystal structure and morphology of the particle were determined using X-ray diffractometer (XRD) and field emission scanning electron microscope (FESEM). These particles with surface functionalisation can be used for live cell imaging.

Citation Download Citation

Anjana R., Kurias K. M., and Jayaraj M. K. "Biocompatible Er, Yb co-doped fluoroapatite upconversion nanoparticles for imaging applications", Proc. SPIE 10344, Nanophotonic Materials XIV, 103440U (28 August 2017); https://doi.org/10.1117/12.2274772

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