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The precursor PVP-capped α-NaYF4:Yb3+/Er3+ nanospheres were used as the templates for preparing the α-NaYF4:Yb3+/Er3+/PVP/MOFs multilayer nanocrystals with a self-template method. By using iron (III) carboxylate and zeolitic imidazolate frameworks dissolved in dimethylformamide (DMF) solution containing 25% of diethylene glycol (DEG), the spherical-shaped α-NaYF4:Yb3+/Er3+/PVP/MIL-100 and α-NaYF4:Yb3+/Er3+/PVP/ZIF-8 multilayer nanocrystals were successfully prepared with the sizes of 300-500 nm at 100oC for one hour. Under a 976-nm laser excitation at room temperature, the α-NaYF4:Yb3+/Er3+/PVP/MIL-100 and α-NaYF4:Yb3+/Er3+/PVP/ZIF-8 multilayer nanocrystals exhibited strong up-conversion luminescence with three emission bands centered at around 520 nm, 540 nm, and 655 nm corresponding to 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, and 4F9/2 → 4I15/2 transitions of Er3+ ions, respectively.
How to Cite
LAM, Thi Kieu Giang et al. Synthesis, characterization and up-conversion luminescence properties of α-NaYF4:Yb3+/Er3+/PVP/MOFs multilayer nanocrystals. Vietnam Journal of Science, Technology and Engineering, [S.l.], v. 59, n. 3, p. 79-84, sep. 2017. ISSN 2525-2461. Available at: <http://vietnamscience.vn/index.php/vistech/article/view/74>. Date accessed: 22 oct. 2017.
NANOSCIENCE AND NANOTECHNOLOGY