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Title: Analytical Approaches To Identify Plasmon-like Excited States in Bare and Ligand-Protected Metal Nanoclusters

Abstract

Noble metal nanoclusters containing dozens to hundreds of metal atoms are of great interest because of their unique optical properties. Classical electrodynamics fails to describe the optical properties of clusters smaller than ~5 nm, so quantum mechanical models are needed to describe these clusters. However, it is challenging to identify which features of the computed excited states indicate plasmon-like character, particularly in a way that is generalizable to the ligand-protected clusters that are commonly studied in experiments. We present an analytical method to identify plasmon-like excited states using three quantifiable indicators that must be considered in combination: (1) large superatomic character, (2) large collectivity among single-particle excitations, and (3) large additivity of contributions of these single-particle excitations to the transition dipole moment. Visualizing these three indicators on a single plot enables rapid classification of hundreds of excited states into plasmon-like, collective, single-particle, or interband categories, or as intermediate between these categories. Lastly, this method is used to identify excited states with plasmon-like character in both bare and ligand-protected Ag clusters at the TDDFT level. Using these three nearly orthogonal indicators in combination provides more information than any one criterion can provide.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [2]
  1. Brandeis Univ., Waltham, MA (United States)
  2. Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
OSTI Identifier:
1598588
Grant/Contract Number:  
SC0004752
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 124; Journal Issue: 5; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Gieseking, Rebecca L. M., Ashwell, Adam P., Ratner, Mark A., and Schatz, George C. Analytical Approaches To Identify Plasmon-like Excited States in Bare and Ligand-Protected Metal Nanoclusters. United States: N. p., 2020. Web. doi:10.1021/acs.jpcc.9b10569.
Gieseking, Rebecca L. M., Ashwell, Adam P., Ratner, Mark A., & Schatz, George C. Analytical Approaches To Identify Plasmon-like Excited States in Bare and Ligand-Protected Metal Nanoclusters. United States. https://doi.org/10.1021/acs.jpcc.9b10569
Gieseking, Rebecca L. M., Ashwell, Adam P., Ratner, Mark A., and Schatz, George C. Wed . "Analytical Approaches To Identify Plasmon-like Excited States in Bare and Ligand-Protected Metal Nanoclusters". United States. https://doi.org/10.1021/acs.jpcc.9b10569. https://www.osti.gov/servlets/purl/1598588.
@article{osti_1598588,
title = {Analytical Approaches To Identify Plasmon-like Excited States in Bare and Ligand-Protected Metal Nanoclusters},
author = {Gieseking, Rebecca L. M. and Ashwell, Adam P. and Ratner, Mark A. and Schatz, George C.},
abstractNote = {Noble metal nanoclusters containing dozens to hundreds of metal atoms are of great interest because of their unique optical properties. Classical electrodynamics fails to describe the optical properties of clusters smaller than ~5 nm, so quantum mechanical models are needed to describe these clusters. However, it is challenging to identify which features of the computed excited states indicate plasmon-like character, particularly in a way that is generalizable to the ligand-protected clusters that are commonly studied in experiments. We present an analytical method to identify plasmon-like excited states using three quantifiable indicators that must be considered in combination: (1) large superatomic character, (2) large collectivity among single-particle excitations, and (3) large additivity of contributions of these single-particle excitations to the transition dipole moment. Visualizing these three indicators on a single plot enables rapid classification of hundreds of excited states into plasmon-like, collective, single-particle, or interband categories, or as intermediate between these categories. Lastly, this method is used to identify excited states with plasmon-like character in both bare and ligand-protected Ag clusters at the TDDFT level. Using these three nearly orthogonal indicators in combination provides more information than any one criterion can provide.},
doi = {10.1021/acs.jpcc.9b10569},
journal = {Journal of Physical Chemistry. C},
number = 5,
volume = 124,
place = {United States},
year = {2020},
month = {1}
}

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Works referencing / citing this record:

Plasmon excitations in chemically heterogeneous nanoarrays
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