Tuning d-Orbital Electronic Structure via Au-Intercalated Two-Dimensional Fe3GeTe2 to Increase Surface Plasmon Activity,The Journal of Physical Chemistry Letters

当前位置： X-MOL 学术 › J. Phys. Chem. Lett. › 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.)

Tuning d-Orbital Electronic Structure via Au-Intercalated Two-Dimensional Fe3GeTe2 to Increase Surface Plasmon Activity
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2024-02-08 , DOI: 10.1021/acs.jpclett.3c02742
Junxiang Li _{1,

2} , Qiqi Li _{2,

3} , Haochuan Feng _{1,

2} , Keke Jiao _{2,

4} , Changjin Zhang ₄ , Shirui Weng ₁ , Liangbao Yang _{1,

2,

5}

Affiliation

While extensive research has been dedicated to plasmon tuning within non-noble metals, prior investigations primarily concentrated on markedly augmenting the inherently low concentration of free carriers in materials with minimal consideration given to the influence of electron orbitals on surface plasmons. Here, we achieve successful intercalation of Au atoms into the layered structure of Fe₃GeTe₂ (FGT), thereby exerting control over the orbital electronic states or structure of FGT. This intervention not only amplifies the charge density and electron mobility but also mitigates the loss associated with interband transitions, resulting in increased two-dimensional FGT surface plasmon activity. As a consequence, Au-intercalated FGT detects crystal violet molecules as a surface-enhanced Raman scattering substrate, and the detection lines are 3 orders of magnitude higher than before Au intercalation. Our work provides insight for further studies on plasmon effects and the relation between surface plasmon resonance behavior and electronic structures.

中文翻译：

通过 Au 插层二维 Fe3GeTe2 调整 d 轨道电子结构以增加表面等离子体激元活性

虽然广泛的研究致力于非贵金属内的等离子体激元调谐，但先前的研究主要集中在显着增强材料中固有的低浓度自由载流子，而很少考虑电子轨道对表面等离子体激元的影响。在这里，我们成功地将Au原子嵌入到Fe ₃ GeTe ₂ (FGT)的层状结构中，从而对FGT的轨道电子态或结构进行控制。这种干预不仅放大了电荷密度和电子迁移率，而且还减轻了与带间跃迁相关的损失，从而增加了二维 FGT 表面等离子体活性。因此，Au插层FGT作为表面增强拉曼散射基底检测结晶紫分子，检测线比Au插层前高3个数量级。我们的工作为进一步研究等离子体效应以及表面等离子体共振行为与电子结构之间的关系提供了见解。

更新日期：2024-02-08

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南