Thermophoresis of charged colloidal particles

TL;DR

This paper investigates the movement of charged colloidal particles under temperature gradients using fluid mechanics, deriving force densities and transport coefficients, and comparing findings with prior research and experiments.

Contribution

It provides a detailed derivation of force densities and thermophoretic coefficients for charged colloids using a fluid-mechanical framework, advancing theoretical understanding.

Findings

Derived force density acting on charged boundary layers.

Calculated particle drift velocity and thermophoretic coefficients.

Compared theoretical results with experimental data.

Abstract

Thermally induced particle flow in a charged colloidal suspension is studied in a fluid-mechanical approach. The force density acting on the charged boundary layer is derived in detail. From Stokes' equation with no-slip boundary conditions at the particle surface, we obtain the particle drift velocity and the thermophoretic transport coefficients. The results are discussed in view of previous work and available experimental data.