Two-dimensional fluid with competing interactions exhibiting microphase separation: theory for bulk and interfacial properties

Details Two-dimensional fluid with competing interactions exhibiting microphase separation: theory for bulk and interfacial properties Two-dimensional fluid with competing interactions exhibiting microphase separation: theory for bulk and interfacial properties

2008-08-29

arxiv.org/abs/0808.4048v1

Phys. Rev. E, 78 031402 (2008).

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 8 figures. Accepted for publication in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.78.031402

Colloidal particles that are confined to an interface such as the air-water interface are an example of a two-dimensional fluid. Such dispersions have been observed to spontaneously form cluster and stripe morphologies in certain systems with isotropic pair potentials between the particles, due to the fact that the pair interaction between the colloids has competing attraction and repulsion over different length scales. Here we present a simple density functional theory for a model of such a two-dimensional fluid. The theory predicts a bulk phase diagram exhibiting cluster, stripe and bubble modulated phases, in addition to homogeneous fluid phases. Comparing with simulation results for this model from the literature, we find that the theory is qualitatively reliable. The model allows for a detailed investigation of the structure of the fluid and we are able to obtain simple approximate expressions for the static structure factor and for the length scale characterising the modulations in the microphase separated phases. We also investigate the behaviour of the system under confinement between two parallel hard walls. We find that the confined fluid phase behaviour can be rather complex.

Affiliated with

Also associated with

No associations

Rating

Two-dimensional fluid with competing interactions exhibiting microphase separation: theory for bulk and interfacial properties does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Two-dimensional fluid with competing interactions exhibiting microphase separation: theory for bulk and interfacial properties, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-dimensional fluid with competing interactions exhibiting microphase separation: theory for bulk and interfacial properties will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-542602