Mean distance of two Brownian particles trapped in a suspended droplet and its dependence on the Debye length

Kosuke Goto, Shinya Sakata, Kousuke Moritani and Norio Inui

Physica A: Statistical Mechanics and its Applications, 2017, vol. 466, issue C, 511-520

Abstract: The Brownian motion of two particles confined near the bottom of a suspended droplet was considered in order to examine the electrical double-layer interaction between them. The mean distance between the particles was expressed as a function of the Debye screening length. We report the application of Brownian particle trajectories for the experimental determination of the Debye screening length between gold particles trapped within a water droplet. This was computed through a comparison of the mean distance measured by observing the Brownian motion with its theoretical value.

Keywords: Brownian motion; Colloid; Electrical double-layer interaction; Debye screening length; Droplet (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:466:y:2017:i:c:p:511-520

DOI: 10.1016/j.physa.2016.09.037

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