Soft chemical synthesis of NaYF4 nanopowders

Федоров, П. П.; Kuznetsov, S. V.; Voronov, V. V.; Yarotskaya, I. V.; Arbenina, V. V.

doi:10.1134/s0036023608110028

Cited by 28 publications

(9 citation statements)

References 12 publications

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“…Methanol solutions of REE tri luoroacetate and sodium in a molar ratio of 1:1.5 were mixed with oleylamine and octadecene. The mentioned ratio was chosen with the aim to stabilize the process of phase formation of NaYF 4 hexagonal structure -a well-known approach based on the phase diagram of NaF-YF 3 [37]. Salt concentrations were 1 mol l -1 .…”

Section: Synthesis Of Core Nps: Nayf 2 :Ybermentioning

confidence: 99%

Synthesis of NaYF4:Yb,Er@SiO2@Ag core-shell nanoparticles for plasmon-enhanced upconversion luminescence in bio-applications

Grigory¹,

Linnik²,

Маматкулов³

et al. 2019

Ann Biomed Sci Eng

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Section: Synthesis Of Core Nps: Nayf 2 :Ybermentioning

confidence: 99%

Synthesis of NaYF4:Yb,Er@SiO2@Ag core-shell nanoparticles for plasmon-enhanced upconversion luminescence in bio-applications

Grigory¹,

Linnik²,

Маматкулов³

et al. 2019

Ann Biomed Sci Eng

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“…β-NaRF 4 powders can be prepared by a broad variety of methods [11,[13][14][15][16]. Until now, several techniques have been employed for the synthesis of hexagonal NaRF 4 ' phases, both individual and co-doped ones, including solidstate synthesis [14,15,17], co-precipitation from water [18][19][20][21][22] and organic solvents [23], hydrothermal [12,24,25], solvothermal [26][27][28][29][30], mechanochemical [31], ionic liquid-assisted [32,33] and molten salt/flux methods [18,[33][34][35][36][37][38][39][40][41][42][43], etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of NaYF4:Yb, Er up-conversion luminophore from nitrate flux

Федоров¹,

Mayakova²,

Alexandrov³

et al. 2020

Nanosystems: Phys. Chem. Math.

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The behavior of nanoparticle ensembles was studied using of NaRF 4 hexagonal phases. The evolution of particles in the process of rapid and productive synthesis from flux as a result of a chemical reaction was investigated. A low-temperature synthesis process in the medium of sodium nitrate was used. Synthesis of the samples of up-conversion phosphor NaY 0.78 Yb 0.2 Er 0.02 F 4 was performed from rare-earth nitrates at 350-430 • C for 15-500 min. NaF was used as the fluorinating agent. Powder X-ray phase analysis and scanning electron microscopy revealed a rapid transformation of the cubic alpha modification into a hexagonal phase, followed by the transformation of nanoparticles into hexagonal prisms of micron sizes. The up-conversion luminescence energy yield increased as the reaction time increased.

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“…The most usual methods of complex fluoride NaYF 4 synthesis are co-precipitation of sodium and yttrium fluorides from aqueous solutions [14,15], microemulsion precipitation [16] and hydrothermal synthesis [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%