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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Controllable preparation of phase-separated Pb/Zn heterogeneous nanoparticles by laser ablation and their application in the growth of PbS tipped ZnS nanorods heterostructures
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Controllable preparation of phase-separated Pb/Zn heterogeneous nanoparticles by laser ablation and their application in the growth of PbS tipped ZnS nanorods heterostructures

机译：通过激光烧蚀通过激光烧蚀的相位分离的Pb / Zn异质纳米颗粒的可控制备及其在PBS的生长中的应用ZnS纳米棒异质结构

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摘要

Phase-separated Pb/Zn heterogeneous nanoparticles (Pb/Zn HNPs) with a controllable phase ratio were firstly prepared by long-pulse-width millisecond laser ablation of Pb/Zn binary metal target immersed in anhydrous ethanol under room conditions. The phase ratio in the as-ablated Pb/Zn HNPs was mainly determined by the molar ratio of Pb/Zn in the initial binary metal target and the structure of Pb/Zn HNPs was partly influenced by the pulse laser width. Then the PBS tipped ZnS nanorods heterostructures (PbS/ZnS heterostructures) were grown by simply heating the mixture of the as-ablated Pb/Zn HNPs and thioacetamide (TAA) at 450 degrees C in a tube furnace. The size and morphology of Pbs/ZnS heterostructures were decided by the original absolute size and relative size between phase-separated Pb and Zn nanoparticle. The formation of Pbs/ZnS heterostructures was the result of the diffusion-limited of S atoms in the Pb/Zn HNPs. This study not only provides a new strategy for the controllable preparation of phase-separated bimetallic nanoparticles that can be used for the growth of specific heterostructures but a new view on the fundamental physical and chemical aspects of nanocrystal formation after laser ablation of solids in liquids. (C) 2019 Elsevier B.V. All rights reserved.
机译：通过在室内条件下浸入无水乙醇中浸入无水乙醇的Pb / Zn二元金属靶的长脉冲宽度毫秒激光烧蚀来制备具有可控相比的相分离的Pb / Zn异质纳米颗粒（Pb / Zn HNP）。 ASBlated PB / Zn HNP中的相比主要通过初始二元金属靶标中的PB / Zn的摩尔比确定，Pb / Zn HNP的结构部分受到脉冲激光宽度的部分地影响。然后通过简单地将450℃的管炉以450℃加热到450℃的混合物，生长PBS Tipped ZnS纳米棒异质结构（PBS / ZnS异质结构）。 PBS / ZnS异质结构的尺寸和形态由相分离的Pb和Zn纳米颗粒之间的原始绝对尺寸和相对尺寸决定。 PBS / ZnS异质结构的形成是PB / Zn HNP中的S原子的扩散限制的结果。该研究不仅为可控制的双金属纳米颗粒的可控制剂提供了一种新的策略，可用于特异性异质结构的生长，而是对液体激光烧蚀固体的纳米晶体形成基本物理和化学方面的新视图。 （c）2019 Elsevier B.v.保留所有权利。

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