Nanoparticle self-assembly at liquid-liquid interfaces (SALI): what's the point?
- Event time: 11:30am
- Event date: 13th November 2009
- Speaker: Lucio Isa (University of Edinburgh)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Self-assembly is found in uncountable natural phenomena and at all length scales. In recent times men have started to harness Nature’s self-organization to direct the assembly of materials and composites. Trapping at the interface, combined with lateral mobility and the presence of specific interactions, makes self-assembly of nanometer-sized colloids at liquid-liquid interfaces a process with huge potential for the creation of controlled “two-dimensional” structures and patterns and of novel ultrathin materials such as membranes and capsules. In particular, I will talk about two specific examples. Firstly I will explore the use of SALI for the deposition of non-close packed crystalline arrays for particle lithography to be used as a fabrication tool for nanoporous substrates for biosensing. The second example deals with the assembly of core-shell, metal oxide nanoparticles into ultrathin responsive membranes. I will initially focus on the kinetics of nanoparticle adsorption at the interface, both from a macroscopic (pendant drop tensiometry) and microscopic (passive microrheology) point of view. Then I will demonstrate preliminary examples of the fabrication of such membranes and of their mechanical characterization.
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..