Synthesis and Characterization of Monodisperse Core-shell Lanthanide Upconversion Nanoparticles NaYF4: Yb,Tm/SiO2

5th International Conference on Advanced Materials Sciences and Technology

Manurung, R.V.^1 ; Wiranto, G.^1 ; Hermida, I.D.P.^1

Research Center for Electronics and Telecommunication, Indonesian Institute of Science, Komplek LIPI Sangkuriang, Jl. Cisitu No.21/154D, Bandung, Jawa Barat

40135, Indonesia^1

关键词: Core shell;    Luminescent nanoparticle;    Narrow size distributions;    Reverse microemulsions;    Synthesis and characterizations;    Thermal decomposition process;    Up-conversion;    Upconversion nanoparticles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/367/1/012043/pdf
DOI  :  10.1088/1757-899X/367/1/012043

来源: IOP

【 摘 要 】

Lanthanide up-converting luminescent nanoparticles (UCNPs) are exciting and promising materials for optical bioimaging, biosensor and theranostic due to their unique and advantageous optical and chemical properties. The UCNPs absorb low energy near-infrared (NIR) light and emit high-energy shorter wavelength photons (visible light). Their unique features allow them to overcome various problems associated with conventional imaging probes such as photostability, lack of toxicity, and to provide versatility for creating nanoplatforms with both imaging and therapeutic modalities. This paper reports synthesis and characterization of core-shell structured of NaYF4:Yb,Tm/SiO2microspheres. The synthesis of lanthanide upconversion nanoparticles NaYF4:Yb,Tm was prepared by thermal decomposition process which involves dissolving organic precursors in high-boiling-point solvents oleic acid (OA) and octadecene (ODE). After that, the NaYF4:Yb,Tm phosphors was coated by silica via reverse microemulsion process to obtain core-shell structured NaYF4:Yb,Tm/SiO2. Scanning electron microscopy, transmission electron microscopy, specific area electron diffraction, and photoluminescence were applied to characterize these samples. The obtained core-shell structured NaYF4:Yb,Tm/SiO2phosphors exhibit a perfect cubic morphology with narrow size distribution and smooth surface. Upon IR excitation at 980 nm, the NaYF4:Yb,Tm/SiO2samples exhibit whitish blue upconversion (UC) luminescence, respectively. These phosphors show potential applications in the displaying on biological fields and biosensing.