Deposition and Aggregation of Au at the Liquid/Liquid Interface

The mesostructure of nanoparticle stabilized interfacial films, in systems such as particle stabilized emulsions, plays a key, yet little understood, role. We have studied a system of gold nanoparticles being formed and aggregating at a planar oil/water interface using optical microscopy. A rapid “n...

Full description

Saved in:
Bibliographic Details
Published in:Analytical Sciences 2009/02/10, Vol.25(2), pp.307-310
Main Authors: CAMPBELL, Andrew I, DRYFE, Robert AW, HAW, Mark D
Format: Article
Language:English
Subjects:
Analytical Chemistry
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:The mesostructure of nanoparticle stabilized interfacial films, in systems such as particle stabilized emulsions, plays a key, yet little understood, role. We have studied a system of gold nanoparticles being formed and aggregating at a planar oil/water interface using optical microscopy. A rapid “nucleation” step of meso (micron) scale aggregates was observed. Aggregation of the meso aggregates to form a percolating structure is seen to switch from a slow to a fast aggregation regime. Aggregation in the slow regime appears to be reaction limited. We tentatively attribute the fast aggregation regime to a capillary attraction.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.25.307