Screening phenomena in macroion suspensions
- Event time: 1:00pm
- Event date: 15th April 2003
- Speaker: Emmanuel Trizac (Laboratoire de Physique Thorique Universit Paris Sud)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
We will first define the notion of renormalized charge that is a key quantity in describing the effective interactions between highly charged macroions immersed in an electrolyte. We will discuss in some detail the case of the relevant parameters associated to DNA at physiological conditions. In a second part, we will consider the problem of the electrostatic interactions and phase behaviour for suspensions of anisotropic colloids. Two examples will be addressed 1) Laponite suspensions (disc-like highly charged platelets) and 2) recently obtained colloidal molecular crystal that exhibit intriguing long range orientational order.
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..