当前位置: X-MOL 学术Adv. Mater. › 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.)
Strain-Induced Modulation of Localized Surface Plasmon Resonance in Ultrathin Hexagonal Gold Nanoplates
Advanced Materials ( IF 29.4 ) Pub Date : 2021-08-02 , DOI: 10.1002/adma.202100653
Gyeong-Su Park 1 , Kyung Suk Min 2 , Hyuksang Kwon 3 , Sangwoon Yoon 4 , Sangwon Park 2 , Ji-Hwan Kwon 3 , Sangmin Lee 1 , Jaeyeon Jo 1 , Miyoung Kim 1 , Seong Keun Kim 2
Affiliation  

Anisotropic gold nanoplates (NPLs) have raised the interesting possibility that their reduced geometrical symmetry allows fine tuning of their optical properties associated with the excitation of localized surface plasmon resonances (LSPRs). Recent developments have greatly improved LSPR tunability by utilizing the spatial distribution of LSPR modes. However, the nanoscale interplay between defect-induced mechanical strain and the spatial variation of LSPR modes remains poorly understood. In this work, the combination of high spatial- and spectral-resolution mapping of LSPR modes and nanoscale strain mapping using aberration-corrected transmission electron microscopy are applied to investigate the nanoscale distribution of LSPR modes in an ultrathin single hexagonal gold NPL and the effect of defect-induced strains on its LSPR properties. The electron energy-loss spectral maps reveal four distinct LSPR components and intensity distributions of all LSPR modes in a hexagonal gold NPL. Furthermore, the strain maps provide experimental evidence that the tensile strain field induced by a Z-shaped faulted dipole is responsible for the asymmetric distribution of LSPR intensity in a hexagonal gold NPL.

中文翻译:

超薄六边形金纳米片中局部表面等离子体共振的应变诱导调制

各向异性金纳米片 (NPL) 提出了一个有趣的可能性,即它们降低的几何对称性允许微调与局部表面等离子体共振 (LSPR) 激发相关的光学特性。最近的发展通过利用 LSPR 模式的空间分布大大提高了 LSPR 的可调谐性。然而,缺陷引起的机械应变与 LSPR 模式的空间变化之间的纳米级相互作用仍然知之甚少。在这项工作中,将 LSPR 模式的高空间和光谱分辨率映射与使用像差校正透射电子显微镜的纳米级应变映射相结合,研究了超薄单六方金 NPL 中 LSPR 模式的纳米级分布以及其 LSPR 特性的缺陷诱导应变。电子能量损失光谱图揭示了六角形金 NPL 中所有 LSPR 模式的四个不同的 LSPR 分量和强度分布。此外,应变图提供了实验证据,表明由 Z 形断层偶极子引起的拉伸应变场是导致六角形金 NPL 中 LSPR 强度不对称分布的原因。
更新日期:2021-09-21
down
wechat
bug