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Optomechanic Coupling in Ag Polymer Nanocomposite Films

[Image: see text] Particle vibrational spectroscopy has emerged as a new tool for the measurement of elasticity, glass transition, and interactions at a nanoscale. For colloid-based materials, however, the weakly localized particle resonances in a fluid or solid medium renders their detection diffic...

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Autores principales: Noual, Adnane, Kang, Eunsoo, Maji, Tanmoy, Gkikas, Manos, Djafari-Rouhani, Bahram, Fytas, George
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8287562/
https://www.ncbi.nlm.nih.gov/pubmed/34295447
http://dx.doi.org/10.1021/acs.jpcc.1c04549
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author Noual, Adnane
Kang, Eunsoo
Maji, Tanmoy
Gkikas, Manos
Djafari-Rouhani, Bahram
Fytas, George
author_facet Noual, Adnane
Kang, Eunsoo
Maji, Tanmoy
Gkikas, Manos
Djafari-Rouhani, Bahram
Fytas, George
author_sort Noual, Adnane
collection PubMed
description [Image: see text] Particle vibrational spectroscopy has emerged as a new tool for the measurement of elasticity, glass transition, and interactions at a nanoscale. For colloid-based materials, however, the weakly localized particle resonances in a fluid or solid medium renders their detection difficult. The strong amplification of the inelastic light scattering near surface plasmon resonance of metallic nanoparticles (NPs) allowed not only the detection of single NP eigenvibrations but also the interparticle interaction effects on the acoustic vibrations of NPs mediated by strong optomechanical coupling. The “rattling” and quadrupolar modes of Ag/polymer and polymer-grafted Ag NPs with different diameters in their assemblies are probed by Brillouin light spectroscopy (BLS). We present thorough theoretical 3D calculations for anisotropic Ag elasticity to quantify the frequency and intensity of the “rattling” mode and hence its BLS activity for different interparticle separations and matrix rigidity. Theoretically, a liquidlike environment, e.g., poly(isobutylene) (PIB) does not support rattling vibration of Ag dimers but unexpectedly hardening of the extremely confined graft melt renders both activation of the former and a frequency blue shift of the fundamental quadrupolar mode in the grafted nanoparticle Ag@PIB film.
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spelling pubmed-82875622021-07-20 Optomechanic Coupling in Ag Polymer Nanocomposite Films Noual, Adnane Kang, Eunsoo Maji, Tanmoy Gkikas, Manos Djafari-Rouhani, Bahram Fytas, George J Phys Chem C Nanomater Interfaces [Image: see text] Particle vibrational spectroscopy has emerged as a new tool for the measurement of elasticity, glass transition, and interactions at a nanoscale. For colloid-based materials, however, the weakly localized particle resonances in a fluid or solid medium renders their detection difficult. The strong amplification of the inelastic light scattering near surface plasmon resonance of metallic nanoparticles (NPs) allowed not only the detection of single NP eigenvibrations but also the interparticle interaction effects on the acoustic vibrations of NPs mediated by strong optomechanical coupling. The “rattling” and quadrupolar modes of Ag/polymer and polymer-grafted Ag NPs with different diameters in their assemblies are probed by Brillouin light spectroscopy (BLS). We present thorough theoretical 3D calculations for anisotropic Ag elasticity to quantify the frequency and intensity of the “rattling” mode and hence its BLS activity for different interparticle separations and matrix rigidity. Theoretically, a liquidlike environment, e.g., poly(isobutylene) (PIB) does not support rattling vibration of Ag dimers but unexpectedly hardening of the extremely confined graft melt renders both activation of the former and a frequency blue shift of the fundamental quadrupolar mode in the grafted nanoparticle Ag@PIB film. American Chemical Society 2021-06-30 2021-07-15 /pmc/articles/PMC8287562/ /pubmed/34295447 http://dx.doi.org/10.1021/acs.jpcc.1c04549 Text en © 2021 The Authors. Published by American Chemical Society Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Noual, Adnane
Kang, Eunsoo
Maji, Tanmoy
Gkikas, Manos
Djafari-Rouhani, Bahram
Fytas, George
Optomechanic Coupling in Ag Polymer Nanocomposite Films
title Optomechanic Coupling in Ag Polymer Nanocomposite Films
title_full Optomechanic Coupling in Ag Polymer Nanocomposite Films
title_fullStr Optomechanic Coupling in Ag Polymer Nanocomposite Films
title_full_unstemmed Optomechanic Coupling in Ag Polymer Nanocomposite Films
title_short Optomechanic Coupling in Ag Polymer Nanocomposite Films
title_sort optomechanic coupling in ag polymer nanocomposite films
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8287562/
https://www.ncbi.nlm.nih.gov/pubmed/34295447
http://dx.doi.org/10.1021/acs.jpcc.1c04549
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