TY  - CONF
AU  - Dinić, Ivana
AU  - Vuković, Marina
AU  - Vulić, Predrag J.
AU  - Nikolić, Marko
AU  - Mančić, Lidija
AU  - Milošević, Olivera
PY  - 2019
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5227
AB  - Up-converting nanoparticles (UCNPs) which have ability to emit a visible light
upon excitation with NIR photons are with wide applications in optoelectronic devices,
forensic, biomedicine and security. The synthesis of the most efficient hexagonal β-
NaYF4:Yb/Er phase in shape of uniformly sized spherical nanoparticles is usually
performed through thermal decomposition of complex organic precursor in high-boiling
organic solvents, which rise deep concerns regarding their potential citotoxicity. In this
work, citric acid and Na-citrate are used for the stabilization of hexagonal polymorph
during solvothermal processing of NaYF4:Yb/Er phase from common inorganic
precursor (rare earth nitrate salts). Additionally, effect of precipitation agent, i.e. fluorine
source (NaF, NH4F and NH4HF2) on the final particle morphology is deduced based on
comprehensive scanning and transmission electron microscopy analyses. Detailed
refinement of the X-ray powder diffraction data (XRPD) revealed simultaneous
nucleation of a cubic and hexagonal phase during solvothermal reaction. The use of citric
acid resulted in formation of micro- and nano- spherical particles of a hexagonal and
cubic NaYF4:Yb/Er phase, respectively, while Na-citrate provoked nucleation of well
crystallized hexagonal crystals of β-NaYF4:Yb/Er phase. Size of the crystallites is
determined by the choice of the precipitant, and is smallest in the case when NH4F is
used. All synthesized powders emit bright and intense green light due to the
intensification of the 2H11/2,4S3/2 →4I15/2 electronic transitions upon the excitation by the
infrared light (λ=978 nm).
PB  - Faculty of Technology, University of Novi Sad
C3  - Conference for Young Scientists in Ceramics Programme and book of abstracts, October 16-19, 2019 Novi Sad, Serbia
T1  - Effects of citric ion on hexagonal NaYF4: Yb/Er phase formation during solvothermal synthesis
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5227
ER  - 

@conference{
author = "Dinić, Ivana and Vuković, Marina and Vulić, Predrag J. and Nikolić, Marko and Mančić, Lidija and Milošević, Olivera",
year = "2019",
abstract = "Up-converting nanoparticles (UCNPs) which have ability to emit a visible light
upon excitation with NIR photons are with wide applications in optoelectronic devices,
forensic, biomedicine and security. The synthesis of the most efficient hexagonal β-
NaYF4:Yb/Er phase in shape of uniformly sized spherical nanoparticles is usually
performed through thermal decomposition of complex organic precursor in high-boiling
organic solvents, which rise deep concerns regarding their potential citotoxicity. In this
work, citric acid and Na-citrate are used for the stabilization of hexagonal polymorph
during solvothermal processing of NaYF4:Yb/Er phase from common inorganic
precursor (rare earth nitrate salts). Additionally, effect of precipitation agent, i.e. fluorine
source (NaF, NH4F and NH4HF2) on the final particle morphology is deduced based on
comprehensive scanning and transmission electron microscopy analyses. Detailed
refinement of the X-ray powder diffraction data (XRPD) revealed simultaneous
nucleation of a cubic and hexagonal phase during solvothermal reaction. The use of citric
acid resulted in formation of micro- and nano- spherical particles of a hexagonal and
cubic NaYF4:Yb/Er phase, respectively, while Na-citrate provoked nucleation of well
crystallized hexagonal crystals of β-NaYF4:Yb/Er phase. Size of the crystallites is
determined by the choice of the precipitant, and is smallest in the case when NH4F is
used. All synthesized powders emit bright and intense green light due to the
intensification of the 2H11/2,4S3/2 →4I15/2 electronic transitions upon the excitation by the
infrared light (λ=978 nm).",
publisher = "Faculty of Technology, University of Novi Sad",
journal = "Conference for Young Scientists in Ceramics Programme and book of abstracts, October 16-19, 2019 Novi Sad, Serbia",
title = "Effects of citric ion on hexagonal NaYF4: Yb/Er phase formation during solvothermal synthesis",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5227"
}

Dinić, I., Vuković, M., Vulić, P. J., Nikolić, M., Mančić, L.,& Milošević, O.. (2019). Effects of citric ion on hexagonal NaYF4: Yb/Er phase formation during solvothermal synthesis. in Conference for Young Scientists in Ceramics Programme and book of abstracts, October 16-19, 2019 Novi Sad, Serbia
Faculty of Technology, University of Novi Sad..
https://hdl.handle.net/21.15107/rcub_cherry_5227

Dinić I, Vuković M, Vulić PJ, Nikolić M, Mančić L, Milošević O. Effects of citric ion on hexagonal NaYF4: Yb/Er phase formation during solvothermal synthesis. in Conference for Young Scientists in Ceramics Programme and book of abstracts, October 16-19, 2019 Novi Sad, Serbia. 2019;.
https://hdl.handle.net/21.15107/rcub_cherry_5227 .

Dinić, Ivana, Vuković, Marina, Vulić, Predrag J., Nikolić, Marko, Mančić, Lidija, Milošević, Olivera, "Effects of citric ion on hexagonal NaYF4: Yb/Er phase formation during solvothermal synthesis" in Conference for Young Scientists in Ceramics Programme and book of abstracts, October 16-19, 2019 Novi Sad, Serbia (2019),
https://hdl.handle.net/21.15107/rcub_cherry_5227 .