Hot Brownian Motion
Daniel Rings, Romy Schachoff, Markus Selmke, Frank Cichos, Klaus Kroy
TL;DR
This paper develops a generalized Markovian model for the non-equilibrium Brownian motion of heated particles in solvents with temperature-dependent viscosity, validated by experiments on laser-heated nanoparticles.
Contribution
It introduces a novel analytical framework for non-equilibrium Brownian motion accounting for temperature-dependent viscosity effects.
Findings
Analytical results align with experimental measurements
Provides a basis for photothermal technology applications
Extends fluctuation-dissipation and Stokes-Einstein relations
Abstract
We derive the generalized Markovian description for the non-equilibrium Brownian motion of a heated particle in a simple solvent with a temperature-dependent viscosity. Our analytical results for the generalized fluctuation-dissipation and Stokes-Einstein relations compare favorably with measurements of laser-heated gold nano-particles and provide a practical rational basis for emerging photothermal technologies.
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