Ab Initio Atomistic Characterization of Confined Bulk and Bennett Plasmons in Metallic Nanoparticles as Probed by Penetrating Electrons

IF 4.8 2区 化学 Q2 CHEMISTRY, PHYSICAL The Journal of Physical Chemistry Letters Pub Date : 2025-03-14 DOI:10.1021/acs.jpclett.5c00157
Bruno Candelas, Mattin Urbieta, Antton Babaze, Eduardo Ogando, Andrei G. Borisov, Nerea Zabala, Javier Aizpurua
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Abstract

Despite the experimental observation of confined bulk plasmons (CBPs) in metallic nanostructures using electron energy-loss spectroscopy (EELS), there is still a limited theoretical understanding of their resonance structure when they are excited by penetrating electron beams. In this work, we use atomistic ab initio time-dependent density functional theory (TDDFT) to perform a first-principles study of the excitation of CBPs induced by swift electrons. Our quantum approach offers a parameter-free framework for the calculation of the EEL spectra of metallic nanoparticles with atomistic resolution, while jellium TDDFT and classical hydrodynamic calculations allow us to unravel the rich spectral pattern associated with CBPs. Additionally, the excitation of high-energy surface resonances characterized by an induced dipole moment across the nanoparticle surface, known as Bennett modes, is also explored. This study represents a significant step forward in the exploration of plasmonic signatures in the EELS of metallic nanoparticles.

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来源期刊
The Journal of Physical Chemistry Letters
The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
9.60
自引率
7.00%
发文量
1519
审稿时长
1.6 months
期刊介绍: The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.
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