TY  - JOUR
AU  - Dhont, J. K. G.
AU  - Wiegand, S.
AU  - Duhr, S.
AU  - Braun, D.
TI  - Thermodiffusion of Charged Colloids: Single-Particle Diffusion
JO  - Langmuir
VL  - 23
SN  - 0743-7463
CY  - Washington, DC
PB  - ACS Publ.
M1  - PreJuSER-56003
SP  - 1674 - 1683
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - An expression for the single-particle thermal diffusion coefficient of a charged colloidal sphere is derived on the basis of force balance on the Brownian time scale in combination with thermodynamics. It is shown that the single-particle thermal diffusion coefficient is related to the temperature dependence of the reversible work necessary to build the colloidal particle, including the core, the solvation layer, and the electrical double layer. From this general expression, an explicit expression for the contribution of the electrical double layer to the single-particle thermal diffusion coefficient is derived in terms of the surface charge density of the colloidal sphere, the electrostatic screening length, and its core radius, to within the Debye-Hückel approximation. This result is shown to explain experimental data, for both thin and thick double layers. In addition, a comparison with other theories is made.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:17279644
UR  - <Go to ISI:>//WOS:000243990200015
DO  - DOI:10.1021/la062184m
UR  - https://juser.fz-juelich.de/record/56003
ER  -