Aggregation of Gold Nanoframes Reduces, Rather Than Enhances, SERS Efficiency Due to the Trade-Off of the Inter- and Intraparticle Plasmonic Fields

Mahmoud MA; El-Sayed MA

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Aggregation of Gold Nanoframes Reduces, Rather Than Enhances, SERS Efficiency Due to the Trade-Off of the Inter- and Intraparticle Plasmonic Fields

机译：金纳米框架的聚集减少，而不是提高，SERS效率由于粒子间和粒子内等离子体场的权衡。

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It is usually observed and understood that aggregation of silver and gold solid nanoparticles gives rise to enhanced SERS spectra due to the increased plasmon field between the particles. In the present work, we observed that the increase of aggregation of Langmuir-Blodgett assembled 80 nm gold nanoframe particles reduces the efficiency of the surf ace-enhanced Raman spectra of adsorbed thiophenol molecules. Using discrete dipole approximation simulation of the plasmonic fields of a pair of nanoframes as a function of their interparticle separation, it is found that at large separation the fields inside the cavities are stronger than those outside. As the interpair separation decreases, the gain in the interparticle field does not make up for the loss in the field within the cavities, supporting the observation of the decrease in the SERS intensity with aggregation.

机译：通常观察到并理解，由于颗粒之间的等离激元场增加，银和金固体纳米颗粒的聚集会产生增强的SERS光谱。在目前的工作中，我们观察到Langmuir-Blodgett组装的80 nm金纳米框架粒子聚集的增加降低了吸附的硫酚分子的表面增强拉曼光谱的效率。通过使用一对纳米框架的等离激元场的离散偶极近似模拟作为其粒子间分离的函数，发现在大的分离时，腔体内的场强于外部的场。随着线对间间距的减小，粒子间场的增益无法弥补腔内场的损耗，从而支持观察到SERS强度随聚集而减小。

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《Nano letters》 |2009年第8期|共7页
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Mahmoud MA; El-Sayed MA;
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1. Aggregation of Gold Nanoframes Reduces, Rather Than Enhances, SERS Efficiency Due to the Trade-Off of the Inter- and Intraparticle Plasmonic Fields [J] . Mahmoud MA, El-Sayed MA Nano letters . 2009,第8期

机译：金纳米框架的聚集减少，而不是提高，SERS效率由于粒子间和粒子内等离子体场的权衡。
2. SERS detection of Biomolecules at Physiological pH via aggregation of Gold Nanorods mediated by Optical Forces and Plasmonic Heating [J] . Barbara Fazio, Cristiano D’Andrea, Antonino Foti, Scientific reports. . 2016,第1期

机译：通过光学力和等离子加热介导的金纳米棒的聚集，在生理pH下SERS检测生物分子
3. Local dielectric environment-dependent plasmonic optical sensitivity of gold nanocage: from nanobox to nanoframe [J] . Jian Zhu, Jiang-Kuan Chen, Jian-Jun Li, Applied Physics . 2019,第1期

机译：金纳米笼子的局部电介质环境依赖性等离子体光学灵敏度：从纳米盒到纳米框架
4. Evolution of Silver/Gold Triangular Nanoframes from Prismatic Silver/Gold Core/Shell Nanostructures and their SERS Properties [C] . P. Parthiban, M. Sakar, S. Balakumar DAE Solid State Physics Symposium . 2014

机译：棱镜/金芯/壳纳米结构的银/金三角形纳米射频的演变及其SERS属性
5. Manipulation of electromagnetic fields with plasmonic nanostructures: Nonlinear frequency mixing, optical manipulation, enhancement and suppression of photocurrent in a silicon photodiode, and surface-enhanced spectroscopy. [D] . Grady, Nathaniel K. 2010

机译：具有等离激元纳米结构的电磁场的操纵：非线性频率混合，光学操纵，硅光电二极管中光电流的增强和抑制以及表面增强光谱。
6. SERS detection of Biomolecules at Physiological pH via aggregation of Gold Nanorods mediated by Optical Forces and Plasmonic Heating [O] . Barbara Fazio, Cristiano D’Andrea, Antonino Foti, -1

机译：通过光学力和等离子加热介导的金纳米棒的聚集在生理pH下SERS检测生物分子
7. One-Pot Self-Templated Growth of Gold Nanoframes for Enhanced Surface-Enhanced Raman Scattering Performance [O] . -1

机译：金纳米振荡的一锅自模木制增长，提升了表面增强拉曼散射性能
8. Plasmonic Resonances in Self-Assembled Reduced Symmetry Gold Nanorod Structures (POSTPRINT). [R] . Biswas, S., Duan, J., Nepal, D., 2013

机译：自组装还原对称金纳米棒结构中的等离子体共振（pOsTpRINT）。

Aggregation of Gold Nanoframes Reduces, Rather Than Enhances, SERS Efficiency Due to the Trade-Off of the Inter- and Intraparticle Plasmonic Fields

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