%0 Conference Paper
%A Dhont, Jan K.G.
%T Rod-like colloids in external electric fields
%I Chemisch Physikalische Gesellschaft
%M FZJ-2015-04828
%D 2015
%X Electric fields can induce interactions between charged colloids that lead to the formation of new phases and dynamical states. In this presentation, the phase/state behavior of very long and thin, highly charged rod-like colloids (fd-virus particles) under oscillating external electric fields is discussed. Fd-virus suspensions exhibit an isotropic-nematic phase transition. For concentrations of fd-virus particles within the two-phase isotropic-nematic coexistence region, various field-induced phase transitions and dynamical states are observed, depending on the field-amplitude and frequency. A non-chiral nematic, a chiral nematic, a homeotropically aligned homogeneous phase, and a dynamical state where non-chiral nematic domains persistently melt and form are observed. The molecular origin of the various phases is discussed, and a semi-quantitative theory is presented for the dynamical state.
%B Institutsseminar, CPG
%C 23 Jun 2015 - 23 Jun 2015, Vienna (Austria)
Y2 23 Jun 2015 - 23 Jun 2015
M2 Vienna, Austria
%F PUB:(DE-HGF)31
%9 Talk (non-conference)
%U https://juser.fz-juelich.de/record/202638