منابع مشابه
Phase Behaviour of Colloidal Systems
torting the helical structure of the phase) and the nematic phase develops when the equilibrium pitch of the cholesteric phase becomes larger than the sample thick ness. This transition is first order and can easily be observed when approaching a smectic phase, because the cholesteric pitch diverges at this transition. In this way, it is possible to observe the growth of the cholesteric phase ...
متن کاملDissertation Phase Behaviour of Colloidal Systems
Depending on the pair interactions of the constitutive system particles, colloidal dispersions display a rich phase behaviour. An important class of colloidal systems is characterised by pair potentials that contain a hard core in addition to versatile potential tails. This class of systems are investigated in the present thesis, focussing on two different aspects. The first one is represented ...
متن کاملPhase behaviour of colloidal assemblies on 2D corrugated substrates.
We investigate--using Monte Carlo computer simulations--the phase behaviour of dimeric colloidal molecules on periodic substrates with square symmetry. The molecules are formed in a two-dimensional suspension of like charged colloids subject to periodic external confinement, which can be experimentally realized by optical methods. We study the evolution of positional and orientational order by ...
متن کاملPhase Transitions in Two-Dimensional Colloidal Systems
This chapter is an introduction to phase transitions in two-dimensional (2D) systems. In contrast to three dimensions (3D), microscopic theories of melting exist in 2D. The most well known of them was developed more than 30 years ago by Kosterlitz, Thouless, Halperin, Nelson, and Young (KTHNY theory). This theory predicts the unbinding of topological defects to break the symmetry in two steps a...
متن کاملStatistical analysis of phase formation in 2D colloidal systems.
Colloidal systems offer unique opportunities for the study of phase formation and structure since their characteristic length scales are accessible to visible light. As a model system the two-dimensional assembly of colloidal magnetic and non-magnetic particles dispersed in a ferrofluid (FF) matrix is studied by transmission optical microscopy. We present a method to statistically evaluate imag...
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ژورنال
عنوان ژورنال: Europhysics News
سال: 1999
ISSN: 0531-7479,1432-1092
DOI: 10.1007/s00770-999-0081-0