Gradient distribution of cations in rhabdophane La0.27Y0.73PO4·nH2O nanoparticles

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2024-10-12 DOI:10.1016/j.physb.2024.416623

M.O. Enikeeva , O.V. Proskurina , E.Yu. Gerasimov , Yu.E. Gorshkova , A.A. Naberezhnov , V.V. Gusarov

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Abstract

The structure of gradient rhabdophane nanoparticles of variable composition (La,Y)PO₄·nH₂O obtained by precipitation is considered. According to the data of HAADF TEM and EDX mapping using the Abel inversion procedure, it was shown that there is an inhomogeneous distribution of yttrium and lanthanum atoms in the particles from the central part to the periphery. At the same time, the nominal composition of both individual nanoparticles and the entire sample meets the value specified during synthesis within the error of the method – La_0.27Y_0.73PO₄·nH₂O. According to SAXS data, it was determined that in the particles of (La,Y)PO₄·nH₂O, there is a redistribution of scattering densities, which is caused by an increase in the fraction of YPO₄ in the peripheral region of the particles. The observed effect of the distribution of cations over the particle made it possible to determine the size of the gradient layer, which reaches 50 % of the total particle size.

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阳离子在La0.27Y0.73PO4-nH2O纳米颗粒中的梯度分布

研究了通过沉淀法获得的不同成分（La,Y）PO4-nH2O 的梯度菱形纳米粒子的结构。根据使用阿贝尔反演程序绘制的 HAADF TEM 和 EDX 图谱数据，可以看出颗粒中的钇原子和镧原子从中心到外围分布不均匀。同时，单个纳米粒子和整个样品的标称成分都符合合成时规定的值--La0.27Y0.73PO4-nH2O，误差在方法误差范围内。根据 SAXS 数据确定，(La,Y)PO4-nH2O 颗粒中的散射密度存在重新分布，这是由于颗粒外围区域的 YPO4 分数增加造成的。根据观察到的阳离子在颗粒上分布的影响，可以确定梯度层的大小，该梯度层达到总粒度的 50%。

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces