Cooling dynamics and thermal interface resistance of glass-embedded metal nanoparticles

Details Cooling dynamics and thermal interface resistance of glass-embedded metal nanoparticles Cooling dynamics and thermal interface resistance of glass-embedded metal nanoparticles

2009-12-16

arxiv.org/abs/0912.3058v1

Physical Review B 80, 19 (2009) 195406

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.80.195406

The cooling dynamics of glass-embedded noble metal nanoparticles with diameters ranging from 4 to 26 nm were studied using ultrafast pump-probe spectroscopy. Measurements were performed probing away from the surface plasmon resonance of the nanoparticles to avoid spurious effects due to glass heating around the particle. In these conditions, the time-domain data reflect the cooling kinetics of the nanoparticle. Cooling dynamics are shown to be controlled by both thermal resistance at the nanoparticule?glass interface, and heat diffusion in the glass matrix. Moreover, the interface conductances are deduced from the experiments and found to be correlated to the acoustic impedance mismatch at the metal/glass interface.

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