We used Inelastic X-ray Scattering to gain insight into the complex Terahertz dynamics of a diluted Au-nanoparticles suspension in glycerol. We observe that, albeit sparse, Au-nanoparticles leave clear signatures on the dynamic response of the system, the main one being an additional mode propagating at the nanoparticle-glycerol interface. A Bayesian inferential analysis of the lineshape reveals that such a mode, at variance with conventional acoustic modes, keeps a hydrodynamic-like behavior well beyond the continuous limit and down to sub-nanometer distances.
Onset of interfacial waves in the terahertz spectrum of a nanoparticle suspension
Alessio De Francesco;Ferdinando Formisano;Ubaldo Bafile;
2020
Abstract
We used Inelastic X-ray Scattering to gain insight into the complex Terahertz dynamics of a diluted Au-nanoparticles suspension in glycerol. We observe that, albeit sparse, Au-nanoparticles leave clear signatures on the dynamic response of the system, the main one being an additional mode propagating at the nanoparticle-glycerol interface. A Bayesian inferential analysis of the lineshape reveals that such a mode, at variance with conventional acoustic modes, keeps a hydrodynamic-like behavior well beyond the continuous limit and down to sub-nanometer distances.File in questo prodotto:
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