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直接可视化在具有尖锐分支的单个金纳米海胆上产生的波长依赖性单偶极子。

Direct Visualization of Wavelength-Dependent Single Dipoles Generated on Single Gold Nanourchins with Sharp Branches.

作者信息

Kim Geun Wan, Ha Ji Won

机构信息

Advanced Nano-Bio-Imaging and Spectroscopy (ANBIS) Laboratory, Department of Chemistry, University of Ulsan, 93 Daehak-Ro, Nam-Gu, Ulsan, 44610, South Korea.

出版信息

Nanoscale Res Lett. 2018 Aug 29;13(1):256. doi: 10.1186/s11671-018-2675-2.

DOI:10.1186/s11671-018-2675-2
PMID:30159615
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6115324/
Abstract

We present the optical properties of singe gold nanourchins (AuNUs) with sharp branches on their surfaces under dark-field (DF) microscopy and spectroscopy. The DF intensities of the single AuNUs were changed periodically as a function of the rotation angle at three localized surface plasmon resonance (LSPR) wavelengths. Furthermore, we demonstrate the generation of single dipoles with different LSPR wavelengths in multiple directions on the same AuNU surface. The multiple LSPR dipoles generated on the AuNU surface were further visualized under defocused DF microscopy and verified by characteristic doughnut-shaped defocused scattering field distributions. ᅟ.

摘要

我们展示了在暗场（DF）显微镜和光谱下，表面带有尖锐分支的单个金纳米海胆（AuNUs）的光学特性。在三个局域表面等离子体共振（LSPR）波长下，单个AuNUs的DF强度随旋转角度呈周期性变化。此外，我们证明了在同一AuNU表面的多个方向上产生具有不同LSPR波长的单个偶极子。在散焦DF显微镜下进一步观察到AuNU表面产生的多个LSPR偶极子，并通过特征性的甜甜圈形状的散焦散射场分布进行了验证。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/90d262b0c6b8/11671_2018_2675_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/332c0f5ece87/11671_2018_2675_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/95a07f9e29a7/11671_2018_2675_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/636c57330c6b/11671_2018_2675_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/c4f868f0ece7/11671_2018_2675_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/90d262b0c6b8/11671_2018_2675_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/332c0f5ece87/11671_2018_2675_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/95a07f9e29a7/11671_2018_2675_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/636c57330c6b/11671_2018_2675_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/c4f868f0ece7/11671_2018_2675_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6e5/6115324/90d262b0c6b8/11671_2018_2675_Fig5_HTML.jpg

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