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Article Dans Une Revue Scientific Reports Année : 2021

The damping of terahertz acoustic modes in aqueous nanoparticle suspensions

Alessio de Francesco
  • Fonction : Auteur
Luisa Scaccia
  • Fonction : Auteur
Ferdinando Formisano
Ubaldo Bafile
Eleonora Guarini
Yugang Zhang
  • Fonction : Auteur
Dmytro Nykypanchuck
  • Fonction : Auteur
Ahmet Alatas
Alessandro Cunsolo

Résumé

Abstract In this work, we investigate the possibility of controlling the acoustic damping in a liquid when nanoparticles are suspended in it. To shed light on this topic, we performed Inelastic X-Ray Scattering ( IXS ) measurements of the terahertz collective dynamics of aqueous suspensions of nanospheres of various materials, size, and relative concentration, either charged or neutral. A Bayesian analysis of measured spectra indicates that the damping of the two acoustic modes of water increases upon nanoparticle immersion. This effect seems particularly pronounced for the longitudinal acoustic mode, which, whenever visible at all, rapidly damps off when increasing the exchanged wavevector. Results also indicate that the observed effect strongly depends on the material the immersed nanoparticles are made of.
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Dates et versions

hal-03451386 , version 1 (26-11-2021)

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Alessio de Francesco, Luisa Scaccia, Ferdinando Formisano, Ubaldo Bafile, Marco Maccarini, et al.. The damping of terahertz acoustic modes in aqueous nanoparticle suspensions. Scientific Reports, 2021, 11 (1), ⟨10.1038/S41598-021-99503-6⟩. ⟨hal-03451386⟩
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