Efficient synthesis of lithium rare-earth tetrafluoride nanocrystals via a continuous flow method

Incorporation of Upconverting LiYF4:Yb3+, Tm3+ Nanoparticles with High Quantum Yield in TiO2 Metallogels for Near Infrared-Driven Photocatalytic Dye Degradation

“…These results indicate that the formation of LiYF 4 nanoparticles is achieved by the interaction of individual LiF and YF 3 at high temperatures. In bulk, LiF and YF 3 binary systems usually result in a eutectic mixture of LiF-YF 3 followed by the formation of single-crystal LiYF 4 , 51,52 whereas in nanoparticles, they either form highly crystalline LiYF 4 single-crystal nanoparticles or a part of them may remain in the forms of LiF and YF 3 depending upon the reaction conditions (temperature, duration, and solvent ratio). 53,54 In our study, we found that when the amount of OA in the decomposition solvent is more than ODE (OA:ODE = 3:1), it favors the formation of thermodynamically stable orthorhombic YF 3 first (due to feeble competition between Li + and Y 3+ ions to interact with F − ions in the solution) and then depending on the reaction conditions (high temperature, long reaction time, etc.…”

Designing stimuli-responsive upconversion nanoparticles based on a mimetic immunoassay for potential accurate diabetic nephropathy diagnosis

“…Based on previous thermolysis methods, [35][36][37] we replaced octadecene with TOA as the noncoordinated solvent for the synthesis of UCNPs, effectively reducing the suck-back and increasing the repeatability of the synthesis experiment. In detail, (CH 3 COO) 3 Yb (1.99 mmol), (CH 3 COO) 3 Tm (0.01 mmol), OA (16.0 mL) and TOA (24.0 mL) were first added into a threeneck flask (100 mL) and heated for 30 min at 160 °C for dissolving.…”

Nucleation and Growth of Bipyramidal Yb:LiYF4 Nanocrystals─Growing Up in a Hot Environment

“…Much work has been done on optimizing the synthesis of doped LiYF 4 NCs through a variety of routes, often yielding NCs with a bipyramidal shape ( vide infra ). ,− Little is known, however, about the complex nucleation and growth mechanisms of this material, with only a few works focusing on the nucleation stage. ,,, When ammonium fluoride is used as the fluoride precursor, instead, reports mention that LiF or YF 3 , nucleate first. Reports using the thermal decomposition of trifluoroacetate (TFA) as the fluoride precursor show the initial formation of semispherical LiYF 4 particles. , None of these reports however discusses how these initial particles grow into a monodisperse ensemble of bipyramidal NCs.…”

“… 23 , 29 − 37 Little is known, however, about the complex nucleation and growth mechanisms of this material, with only a few works focusing on the nucleation stage. 32 , 34 , 35 , 38 When ammonium fluoride is used as the fluoride precursor, instead, reports mention that LiF 34 or YF 3 22 , 39 nucleate first. Reports using the thermal decomposition of trifluoroacetate (TFA) as the fluoride precursor show the initial formation of semispherical LiYF 4 particles.…”