Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 13, 2018
Previous Article Next Article

Towards the colloidal Laves phase from binary hard-sphere mixtures via sedimentation

Author affiliations

Abstract

Colloidal photonic crystals, which show a complete band gap in the visible region, have numerous applications in fibre optics, energy storage and conversion, and optical wave guides. Intriguingly, two of the best examples of photonic crystals, the diamond and pyrochlore structure, can be self-assembled into the colloidal MgCu2 Laves phase crystal from a simple binary hard-sphere mixture. For these colloidal length scales thermal and gravitational energies are often comparable and therefore it is worthwhile to study the sedimentation phase behavior of these systems. For a multicomponent system this is possible through a theoretical construct known as a stacking diagram, which constitutes a set of all possible stacking sequences of phases in a sedimentation column, and uses as input the bulk phase diagram of the system in the chemical potential plane. We determine the stable phases for binary hard-sphere systems with varying diameter ratios using Monte Carlo simulations and analytical equations of state available in literature and calculate the corresponding stacking diagrams. We also discuss observations from event-driven Brownian dynamics simulations in relation to our theoretical stacking diagrams.

Graphical abstract: Towards the colloidal Laves phase from binary hard-sphere mixtures via sedimentation

Back to tab navigation

Article information


Submitted
01 Feb 2018
Accepted
15 Mar 2018
First published
21 Mar 2018

Soft Matter, 2018,14, 2465-2475
Article type
Paper

Towards the colloidal Laves phase from binary hard-sphere mixtures via sedimentation

T. Dasgupta and M. Dijkstra, Soft Matter, 2018, 14, 2465
DOI: 10.1039/C8SM00237A

Social activity

Search articles by author

Spotlight

Advertisements