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説明:

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.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: Silver nanospheres, Silver nanocubes , Polycrystalline structure, Crystallite size, Transient absorption spectroscopy , Electron-phonon coupling

刊行年月日: 2023-09-17

出版者: Elsevier BV

掲載誌:

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

研究助成金:

• 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)

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.jmat.2023.08.009

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更新時刻: 2024-08-20 12:30:37 +0900

MDRでの公開時刻: 2024-08-20 12:30:37 +0900