Techniques for trapping and studying colloids on liquid-liquid interfaces

Condensed Matter lunchtime seminar

Techniques for trapping and studying colloids on liquid-liquid interfaces

  • Event time: 1:00pm
  • Event date: 24th April 2006
  • Speaker: Eva Herzig (University of Edinburgh)
  • Location: Room 2511,

Event details

Colloids can be irreversibly trapped at liquid-liquid interfaces. This property can be used to stabilise emulsions and therefore retains an out-of-equilibrium configuration. We have developed a new method of creating emulsions and novel convoluted structures by exploiting the demixing process that occurs when two miscible liquids turn immiscible. This can be done using either a temperature or pressure quench.

We are currently using X-ray photon correlation spectroscopy (XPCS) to examine the dynamics of the silica colloids on the interface depending on both particle and droplet size. We are also developing a pressure cell which will allow us to carry out pressure quenches. I will present the current state of affairs at these two fronts.

This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..

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