2015年10月1日 · Beta-NaYF4: Yb 3+, Er 3+ was prepared by new method using beta-cyclodextrin. Beta-cyclodextrin prevents the pyrohydrolysis and allows to obtain pure samples. Samples prepared using beta-cyclodextrin had homogeneous distribution of elements.

2022年4月20日 · The NaYF4:Yb3+:Er3+/NaYF4 upconversion nanophosphors (UCNPs) containing ions of rare-earth elements with a core/shell structure were synthesized solvothermally, and their photoluminescent properties were analyzed depending on the size of nanoparticles and preparative synthesis conditions.

2020年1月1日 · In this work, the density functional theory approach with linear combination of atomic orbitals (LCAO) as implemented in the CRYSTAL17 computer code is applied to hexagonal β-NaYF 4, located in three possible space groups of this compound: P …

2019年8月5日 · The pattern in red refers to the standard pattern (ICDD PDF #16-0334) of hexagonal phase NaYF 4. The doping ratio of the lanthanide ions in the particles matches the ratio of the respective lanthanide chlorides used in the synthesis as confirmed via mass spectrometry combined with inductively coupled plasma (ICP-MS) measurements (Table S1 ...

2018年1月1日 · NaFY 4 doped by rare-earth ions is an interesting material with fundamental and technological relevance. The properties such as: low phonon energies (<350 cm −1), high refractive index and tunable crystal phase are advantages over …

NaYF4:Ln3+的巨大和持续的兴趣主要来自其卓越的上转换特性，包括单个纳米颗粒的最高上转换效率、通过能量转移工程实现的出色波长可调性以及优异的辐射稳定性和热暴露。 因此，NaYF4:Ln3+在体内/体外生物成像、生物治疗、光学传感器、三维（3D）光学信息存储和三维立体显示器中发现了广泛的应用。 在过去的二十年中，探索NaYF4:Ln3+纳米颗粒更多功能的努力从未停止过。 然而，纳米粒子的大比表面积容易导致发射猝灭，这极大地阻碍了新功能的发现 …

2019年3月19日 · In this study, we demonstrate a process to directly make hexagonal phase β-NaYF 4:Yb/Er thin films through electrodeposition of thin film onto β-NaGdF 4 underlayer at or near room temperature.

Graph (C) shows the corresponding XRD patterns and the standard XRD pattern of β-NaYF4 (ICDD PDF 16-334). [...] We describe the preparation of monodisperse, lanthanide-doped hexagonal-phase...

2021年6月23日 · In this paper, we report that monodispersed nanoscale NaYF 4:Ln 3+, unexpectedly, can also be an excellent persistent luminescent (PersL) material. The NaYF 4:Ln 3+ nanoparticles with...

Er³⁺-sensitized NaYF4 crystals doped with Tm³⁺ and Ho³⁺ ions generate pure red light more efficaciously under 1532 nm excitation than under 980 nm excitation.