Composition and structure of magnetic high-temperature-phase, stable Fe–Au core–shell nanoparticles with zero-valent bcc Fe core,Nanoscale Advances

当前位置： X-MOL 学术 › Nanoscale Adv. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Composition and structure of magnetic high-temperature-phase, stable Fe–Au core–shell nanoparticles with zero-valent bcc Fe core
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-08-10 , DOI: 10.1039/d0na00514b
Marius Kamp ₁ , Anna Tymoczko ₂ , Radian Popescu ₃ , Ulrich Schürmann ₁ , Ruksan Nadarajah ₂ , Bilal Gökce ₂ , Christoph Rehbock ₂ , Dagmar Gerthsen ₃ , Stephan Barcikowski ₂ , Lorenz Kienle ₁

Affiliation

Advanced quantitative TEM/EDXS methods were used to characterize different ultrastructures of magnetic Fe–Au core–shell nanoparticles formed by laser ablation in liquids. The findings demonstrate the presence of Au-rich alloy shells with varying composition in all structures and elemental bcc Fe cores. The identified structures are metastable phases interpreted by analogy to the bulk phase diagram. Based on this, we propose a formation mechanism of these complex ultrastructures. To show the magnetic response of these magnetic core nanoparticles protected by a noble metal shell, we demonstrate the formation of nanostrands in the presence of an external magnetic field. We find that it is possible to control the lengths of these strands by the iron content within the alloy nanoparticles.

中文翻译：

零价体心立方铁核的磁性高温相稳定的铁金核壳纳米粒子的组成和结构

先进的定量 TEM/EDXS 方法用于表征通过激光烧蚀在液体中形成的磁性 Fe-Au 核壳纳米粒子的不同超微结构。研究结果表明，在所有结构和元素 bcc Fe 核中都存在具有不同成分的富金合金壳。所识别的结构是通过类比体相图来解释的亚稳态相。基于此，我们提出了这些复杂超微结构的形成机制。为了显示这些受贵金属壳保护的磁芯纳米粒子的磁响应，我们展示了在存在外部磁场的情况下纳米链的形成。我们发现可以通过合金纳米颗粒中的铁含量来控制这些链的长度。

更新日期：2020-09-16

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文