Deposition and aggregation of Au at the liquid/liquid interface

A. Campbell, Mark D. Haw

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)307-310
Number of pages3
JournalAnalytical Sciences
Volume25
Issue number2
DOIs
Publication statusPublished - 2009

Keywords

  • analytical science
  • nanoparticles
  • optical microscopy
  • chemical engineering

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