Thermal decomposition synthesis of Er3+-activated NaYbF4 upconverting microparticles for optical temperature sensing

Baziulytė-Paulavičienė, Dovilė; Traskina, Nadezda; Vargalis, Rokas; Katelnikovas, Artūras; Šakirzanovas, Simas

doi:10.1016/j.jlumin.2019.116672

Cited by 25 publications

(9 citation statements)

References 42 publications

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“…27-1427). β -NaYbF 4 showed a similar crystal structure (hexagonal) and UC emission spectra to those of LaF 3 -type nanoparticles, which have been reported in relevant studies [ 40 , 41 , 42 ]. Therefore, β-NaYbF 4 would not affect the crystal morphology and peak positions of the UC emissions of the LaF 3 UCNPs, as confirmed in the following section based on the PL spectra (Figure 4).…”

Section: Resultssupporting

confidence: 76%

“…The fluorescence intensities of the UCNPs synthesized by the 1 h reaction with the addition of 2.5 and 5 mmol NaOH were significantly high, approximately 17 times that of the control sample. Most importantly, from Figure 4 , under the abovementioned two synthetic conditions, the positions of the characteristic emission peaks did not change because β-NaYbF 4 exhibited UC emission peaks similar to those of the LaF 3 nanocrystals [ 40 , 41 , 42 ].…”

Section: Resultsmentioning

confidence: 99%

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Synthesis, Optical Properties, and Sensing Applications of LaF3:Yb3+/Er3+/Ho3+/Tm3+ Upconversion Nanoparticles

et al. 2020

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Herein, we successfully synthesized a series of LaF3:Yb3+/Er3+/Ho3+/Tm3+ upconversion nanoparticles (UCNPs) and LaF3:Yb3+0.20, Er3+0.02@LaF3:Yb3+0.20 core/shell UCNPs by modifying the amount of NaOH and the reaction time. Hexagonal LaF3 nanocrystals with uniform particle sizes and bright UC emissions were obtained. The crystal structures of the lanthanide-doped LaF3 UCNPs were investigated using wide-angle X-ray diffraction. The morphologies and particle sizes of the nanocrystals were determined using transmission electron microscopy. The photoluminescence (PL) spectra of the LaF3 nanocrystals could be tuned by altering the doping ratio of Er3+, Ho3+, and Tm3+. In addition, the PL intensities increased after coating the UCNP cores with an active shell. The fluorescence intensities of the UCNPs synthesized via a one-hour reaction with the addition of 2.5 or 5 mmol NaOH increased by up to 17 times compared with the sample prepared without the addition of NaOH. By modifying the doping ratio of Yb/Tm, UV-emissive LaF3 nanocrystals were obtained. After surface modification by ligand exchange, the hydrophobic LaF3:Yb3+0.20, Er3+0.02@LaF3:Yb3+0.20 core/shell UCNPs became water-dispersible. These colloid UCNPs could be utilized as a fluorescent probe for the detection of Hg2+ ions under 980 nm near-infrared irradiation.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Synthesis, Optical Properties, and Sensing Applications of LaF3:Yb3+/Er3+/Ho3+/Tm3+ Upconversion Nanoparticles

et al. 2020

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“…Many previous works have reported the application of fluoride in temperature sensing. Baziulyte-Paulaviciene successfully synthesized Er 3+ doped hexagonal NaYbF 4 particles, which can work in the temperature range of 175–475 K, and reach the maximum relative sensor sensitivity of 3.46% K −1 at 175 K. 17 Qiang synthesized Mn 2+ co-doped hexagonal NaGdF 4 : Yb 3+ , Ho 3+ nano-phosphor, and proved that high-concentration Mn 2+ doping can improve the sensing sensitivity of the sample. 18 Kumar successfully doped GdF 3 : Ho 3+ , Yb 3+ phosphors with Ag + to achieve emission enhancement and real-time temperature sensing through magnetic field adjustment.…”

Section: Introductionmentioning

confidence: 99%

Controllable crystal form transformation and luminescence properties of up-conversion luminescent material K₃Sc_0.5Lu_0.5F₆: Er³⁺, Yb³⁺ with cryolite structure

et al. 2021

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“…For this reason, various low-molecular-weight surfactants such as TWEEN, CTAB, and TRITON are used to enhance the stability of various nanoparticle systems. 23 , 39 , 52 − 55 Even though the use of various commercial surfactants often prevents particles from agglomerating, such surface modification cannot always ensure the desired stability of nanoparticles, especially in water. There is currently no effective universal way to ensure the colloidal stability of various nano- and microsized particles in aqueous colloids.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cationic Brush-Type Copolymers on the Colloidal Stability of GdPO₄ Particles with Different Morphologies in Biological Aqueous Media

et al. 2020

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In this study, we present the synthesis of cationic brush-type polyelectrolytes and their use in the stabilization of GdPO 4 particles in aqueous media. Polymers of various compositions were synthesized via the RAFT polymerization route. SEC equipped with triple detection (RI, DP, RALS, and LALS) was used to determine the molecular parameters ( M n , M w , M w / M n ). The exact composition of synthesized polymers was determined using NMR spectroscopy. Cationic brush-type polymers were used to improve the stability of aqueous GdPO 4 particle dispersions. First, the IEPs of GdPO 4 particles with different morphologies (nanorods, hexagonal nanoprisms, and submicrospheres) were determined by measuring the zeta potential of bare particle dispersions at various pH values. Afterward, cationic brush-type polyelectrolytes with different compositions were used for the surface modification of GdPO 4 particles (negatively charged in alkaline media under a pH value of ∼10.6). The concentration and composition effects of used polymers on the change in particle surface potential and stability (DLS measurements) in dispersions were investigated and presented in this work. The most remarkable result of this study is redispersible GdPO 4 nanoparticle colloids with increased biocompatibility and stability as well as new insights into possible cationic brush-type polyelectrolyte applicability in both scientific and commercial fields.

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Thermal decomposition synthesis of Er3+-activated NaYbF4 upconverting microparticles for optical temperature sensing

Cited by 25 publications

References 42 publications

Synthesis, Optical Properties, and Sensing Applications of LaF3:Yb3+/Er3+/Ho3+/Tm3+ Upconversion Nanoparticles

Synthesis, Optical Properties, and Sensing Applications of LaF3:Yb3+/Er3+/Ho3+/Tm3+ Upconversion Nanoparticles

Controllable crystal form transformation and luminescence properties of up-conversion luminescent material K₃Sc_0.5Lu_0.5F₆: Er³⁺, Yb³⁺ with cryolite structure

Effect of Cationic Brush-Type Copolymers on the Colloidal Stability of GdPO₄ Particles with Different Morphologies in Biological Aqueous Media

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Thermal decomposition synthesis of Er3+-activated NaYbF4 upconverting microparticles for optical temperature sensing

Cited by 25 publications

References 42 publications

Synthesis, Optical Properties, and Sensing Applications of LaF3:Yb3+/Er3+/Ho3+/Tm3+ Upconversion Nanoparticles

Synthesis, Optical Properties, and Sensing Applications of LaF3:Yb3+/Er3+/Ho3+/Tm3+ Upconversion Nanoparticles

Controllable crystal form transformation and luminescence properties of up-conversion luminescent material K3Sc0.5Lu0.5F6: Er3+, Yb3+ with cryolite structure

Effect of Cationic Brush-Type Copolymers on the Colloidal Stability of GdPO4 Particles with Different Morphologies in Biological Aqueous Media

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Product

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Controllable crystal form transformation and luminescence properties of up-conversion luminescent material K₃Sc_0.5Lu_0.5F₆: Er³⁺, Yb³⁺ with cryolite structure

Effect of Cationic Brush-Type Copolymers on the Colloidal Stability of GdPO₄ Particles with Different Morphologies in Biological Aqueous Media