Effect of chemically induced permittivity changes on the plasmonic properties of metal nanoparticles
Effect of chemically induced permittivity changes on the plasmonic properties of metal nanoparticles
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DOI：
10.1038/s43246-021-00159-6
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发表时间：
2021-06
影响因子：
7.8
通讯作者：
N. Saito;Sou Ryuzaki;Yuta Tsuji;Y. Noguchi;Rintaro Matsuda;Pangpang Wang;Daisuke Tanaka;Yusuke Arima;K. Okamoto;K. Yoshizawa;K. Tamada
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文献类型：
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作者：
N. Saito;Sou Ryuzaki;Yuta Tsuji;Y. Noguchi;Rintaro Matsuda;Pangpang Wang;Daisuke Tanaka;Yusuke Arima;K. Okamoto;K. Yoshizawa;K. Tamada
理解由于金属上的表面分子而对金属纳米材料的等离子体性质的化学效应在等离子体学领域中非常重要，并且这些效应尚未完全阐明。在这里，我们报告的化学诱导的电子状态的变化机制，在金属-配体界面的银纳米粒子由于配体分子，和这种变化的影响，这些纳米粒子的等离子体性质。有人发现，在金属-配体界面的电子态密度的变化引起的诱导和永久的偶极矩的变化，并最终在界面处的介电常数，当费米能级附近的波函数是本地化的接口。这些改变在确定银纳米颗粒的等离子体性质中起关键作用。目前的研究结果提供了一个更精确的理解之间的互连的电子状态在金属有机界面和金属的等离子体性质。
Understanding chemical effects on the plasmonic properties of a metal nanomaterial due to the surface molecules on that metal is of great importance in the field of plasmonics and these effects have yet to be completely elucidated. Here, we report mechanisms of the chemically induced change in the electronic state at the metal-ligand interface of silver nanoparticles due to the ligand molecules, and the effect of this change on the plasmonic properties of those nanoparticles. It was found that changes in the electron density of states at the metal-ligand interface cause alterations in the induced and permanent dipole moments, and eventually to the permittivity at the interface, when the wave function near the Fermi level is localized at the interface. These alterations play a key role in determining the plasmonic properties of silver nanoparticles. The present findings provide a more precise understanding of the interconnection between the electronic states at the metal-organic interface and the plasmonic properties of the metal.