Theory of Hot Brownian Motion

被引:27
作者
Rings, Daniel [1 ]
Selmke, Markus [2 ]
Cichos, Frank [2 ]
Kroy, Klaus [1 ]
机构
[1] Univ Leipzig, Inst Theoret Phys, D-04009 Leipzig, Germany
[2] Univ Leipzig, Inst Expt Phys 1, D-04103 Leipzig, Germany
关键词
SINGLE NANOPARTICLE; VISCOUS-FLUID; DIFFUSION; PARTICLES; TRACKING; PHYSICS; FLUCTUATIONS; SYSTEMS; WALKER; DRIFT;
D O I
10.1039/c0sm00854k
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The erratic motion of suspended colloidal particles due to thermal fluctuations of the solvent molecules is well known as Brownian motion and has long found its theoretical explanation as an equilibrium phenomenon. In this work, we abandon the homogeneity of temperature and viscosity and address so-called hot Brownian motion [Rings et al., Phys. Rev. Lett., 2010, 105 (9), 090604] of (laser-)heated nanoparticles. We develop an effective Markovian equilibrium description for this non-equilibrium phenomenon by deriving the appropriate effective temperature and viscosity parameters from a generalized theory of fluctuating hydrodynamics. On the basis of our systematic mathematical formulation we propose a numerically accurate simplified model that yields analytical results.
引用
收藏
页码:3441 / 3452
页数:12
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