Article Size and crystallinity effect on the ultrafast optical response of chemically synthesized silver nanoparticles

Nadzeya Khinevich ; Domantas Peckus ; Asta Tamulevičienė ; Gerda Klimaitė ; Joel Henzie SAMURAI ORCID (National Institute for Materials Science) ; Tomas Tamulevičius ; Sigitas Tamulevičius

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Nadzeya Khinevich, Domantas Peckus, Asta Tamulevičienė, Gerda Klimaitė, Joel Henzie, Tomas Tamulevičius, Sigitas Tamulevičius. Size and crystallinity effect on the ultrafast optical response of chemically synthesized silver nanoparticles. Journal of Materiomics. 2023, 10 (3), 594-600. https://doi.org/10.1016/j.jmat.2023.08.009
SAMURAI

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(abstract)

The excited localized surface plasmon (LSP) in metallic nanoparticles is known to relax through several processes such as electron-electron scattering, electron-phonon coupling, and phonon-phonon scattering. In the current research, the ultrafast electron-phonon (e-ph) coupling relaxation processes for different average sizes and crystallinity of chemically synthesized silver nanoparticles were evaluated utilizing transient absorption spectroscopy. The nanoparticle size and crystallinity of similar linear dimension polycrystalline spherical and monocrystalline cubic nanoparticles ranging from ca. 30e60 nm was related to their electron relaxation time constants and revealed very different dependencies. For the monocrystalline nanocubes, the electron-phonon coupling was not dependent on the cube edge length, while for the polycrystalline nanospheres, it was linearly decreasing with diameter. We demonstrate that the e-ph coupling time constant could be used to evaluate crystallinity and crystallite size in plasmonic metal nanoparticles when the size (surface area) of the nanoparticle is known.

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Keyword: Silver nanospheres, Silver nanocubes , Polycrystalline structure, Crystallite size, Transient absorption spectroscopy , Electron-phonon coupling

Date published: 2023-09-17

Publisher: Elsevier BV

Journal:

  • Journal of Materiomics (ISSN: 23528478) vol. 10 issue. 3 p. 594-600

Funding:

  • MEXT | Japan Society for the Promotion of Science (JSPS) 20K05453 (Grant-in-aid for Scientific Research (C))
  • European Union’s Horizon 2020 Research and Innovation Program 685451 (LaSensA project carried out under the M-ERA.NET 2 scheme)

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1016/j.jmat.2023.08.009

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Updated at: 2024-08-20 12:30:37 +0900

Published on MDR: 2024-08-20 12:30:37 +0900

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