공동침전법 기반 고발광 상향변환 나노입자의 합성법 및 특성 분석 = Synthesis and characterization of highly luminescent upconversion nanoparticles

다국어 초록 (Multilingual Abstract)

Lanthanide-doped upconversion nanoparticles (UCNPs) are capable of converting low energy near-infrared photons into relatively high energy visible and ultraviolet photon. Their unique optical properties have a broad range of applications such as volumetric display, security labelling and deep-tissue imaging. Herein, the optically active hexagonalphased NaYF4:Nd3+, Yb3+@NaYF4:Yb3+, Tm3+ core-shell nanoparticles were synthesized via facile co-precipitation method which can show upconversion luminescence upon 745 nm laser excitation. This is accomplished by taking advantages of the large absorption cross-section of Nd3+ ions between 720 to 760 nm plus efficient spatial energy transfer and migration which starts from Nd3+ ions to Yb3+ ions and Tm3+ ions. Also, the formation of inert NaYF4 shell significantly enhance the pconversion efficiency. The core-shell-shell UCNPs were characterized with X-ray diffraction (XRD) patterns, scanning electron microscope (SEM), transmission electron microscope (TEM), absorbance, and photoluminescence spectra.

참고문헌 (Reference)

1 A. Gnach, "Upconverting nanoparticles : assesing the toxicity" 44 : 1561-, 2015

2 J. Zhou, "Upconversion luminescent materials : advanced and applications" 115 : 395-, 2015

3 F. Auzel, "Upconversion and anti-stokes processes with f and d ions in solids" 104 : 139-, 2004

4 F. Wang, "Tuning upconversion through energy migration in core-shell nanoparticles" 10 : 968-, 2011

5 Z. Mi, "Subwavelength imaging through ion-beam-induced upconversion" 6 : 8832-, 2015

6 S. Gai, "Recent progress in rare earth micro/nanocrystals : soft chemical synthesis, luminescent properties, and biomedical applications" 114 : 2343-, 2013

7 S. Fischer, "Pricise tuning of surface quenching for luminescence enhancement in core-shell lanthanide-doped nanocrystals" 16 : 7241-, 2016

8 X. Liu, "Photon upconversion nanomaterials" 44 : 1299-, 2015

9 S. Wilhelm, "Perspectives for upconverting nanoparticles" 11 : 10644-, 2017

10 C. Ma, "Optical sensitizer concentration in single upconversion nanocrystals" 17 : 2858-, 2017

11 X. Zhu, "Luminescence lifetime imagning based on lanthanide nanoparticles" 61 : e202209378-, 2022

12 C. Lee, "Giant nonlinear optical responses from photon-avalanching nanoparticles" 589 : 230-, 2021

13 X. Wu, "Dye-sensitized core/active shell upconversion nanoparticles for optogenetics and bioimaging applications" 10 : 1060-, 2016

14 E. Andresen, "Assesing the reproducibility and up-scaling of the synthesis of Er, Yb-doped NaYF4-based upconverting nanoparticles and control of size, morphology, and optical properties" 14 : 2288-, 2023