Oppositely Charged Model Ceramic Colloids: Numerical Predictions and Experimental Observations by Confocal Laser Scanning Microscopy

Fluorescent silica and alumina-like spherical particles with almost equal sizes are synthesized. Dilute aqueous suspensions are prepared with various ratios of those colloidal particles that exhibit opposite surface charges. These suspensions undergo heteroaggregation for a wide range of composition...

Full description

Saved in:
Bibliographic Details
Published in:Langmuir 2010-08, Vol.26 (15), p.12540-12547
Main Authors: Piechowiak, M. A, Videcoq, A, Rossignol, F, Pagnoux, C, Carrion, C, Cerbelaud, M, Ferrando, R
Format: Article
Language:English
Subjects:
Aluminum Oxide - chemistry
Chemistry
Colloidal state and disperse state
Colloids - chemistry
Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams
Exact sciences and technology
General and physical chemistry
Microscopy, Confocal
Models, Theoretical
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Silicon Dioxide - chemistry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Fluorescent silica and alumina-like spherical particles with almost equal sizes are synthesized. Dilute aqueous suspensions are prepared with various ratios of those colloidal particles that exhibit opposite surface charges. These suspensions undergo heteroaggregation for a wide range of compositions. The structure of the formed aggregates is analyzed by means of confocal microscopy. The experimental results are compared to those of Brownian dynamics simulations in which the interactions between colloids are modeled by the DLVO potential. Good agreement between experiments and simulations is obtained.
ISSN:0743-7463
1520-5827
DOI:10.1021/la101027d