Renormalization in charged colloids: non-monotonic behaviour with the surface charge

Haro-Pérez, C.; Quesada-Pérez, M.; Callejas-Fernández, J.; Schurtenberger, Peter; Hidalgo-Álvarez, R.

doi:10.1088/0953-8984/18/28/L01

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Journal article

Renormalization in charged colloids: non-monotonic behaviour with the surface charge

Haro-Pérez, C. Grupo de Física de Fluidos y Biocoloides Departamento de Física, Facultad de Ciencias, University of Granada, Spain
Quesada-Pérez, M. Departmento de Física, Escuela Politécnica Superior de Linares, University of Jaén, Spain
Callejas-Fernández, J. Grupo de Física de Fluidos y Biocoloides Departamento de Física, Facultad de Ciencias, University of Granada, Spain
Schurtenberger, Peter Department of Physics, University of Fribourg, Switzerland
Hidalgo-Álvarez, R. Grupo de Física de Fluidos y Biocoloides Departamento de Física, Facultad de Ciencias, University of Granada, Spain

28.06.2006

Published in:

Journal of Physics: Condensed Matter. - 2006, vol. 18, p. L363-L369

English The static structure factor S(q) is measured for a set of deionized latex dispersions with different numbers of ionizable surface groups per particle and similar diameters. For a given volume fraction, the height of the main peak of S(q), which is a direct measure of the spatial ordering of latex particles, does not increase monotonically with the number of ionizable groups. This behaviour cannot be described using the classical renormalization scheme based on the cell model. We analyse our experimental data using a renormalization model based on the jellium approximation, which predicts the weakening of the spatial order for moderate and large particle charges.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language