Open AccessSynthesis of NaYF4 doped with Eu3+ions by hydrothermal method for the application in the security printing
Author(s) -
Dung Thi My Cao,
Thon Van Nguyen,
Van Thi Thanh Tran
Publication year - 2018
Publication title -
khoa học và công nghệ: tự nhiên
Language(s) - English
Resource type - Journals
ISSN - 2588-106X
DOI - 10.32508/stdjns.v1i6.628
Subject(s) - hydrothermal circulation , ion , nanocrystal , doping , excitation , materials science , hexagonal crystal system , rare earth , nanotechnology , analytical chemistry (journal) , chemical engineering , chemistry , crystallography , optoelectronics , metallurgy , environmental chemistry , physics , organic chemistry , quantum mechanics , engineering
NaYF4 nanocrystals doped with Eu3+ ions have been prepared by hydrothermal method at 180 oC for 24 hours, then they were treated at 500 oC in air. The result of XRD showed NaYF4 nanocrystals exitsted hexagonal β phase. The structure of NaYF4 was not affected by the presence of rare earth ion. Under excitation at 395 nm, the PL spectra have emission bands at 592, 615 and 689–695 nm attributed to 5Do7F1, 5Do7F2 and 5Do7F3 transitions of Eu3+ ion. NaYF4:Eu NPs possess a high security properties upon an excitation at 254 nm.