Phase Separation and Self-Assembly in a Fluid of Mickey Mouse Particles

Abstract

Recent developments in the synthesis of colloidal particles allow for control over shape and inter-particle interaction. One example, among others, is the so-called "Mickey Mouse" (MM) particle for which the self-assembly properties have been previously studied yielding a stable cluster phase together with elongated, tube-like structures. Here, we investigate under which conditions a fluid of Mickey Mouse particles can yield phase separation and how the self-assembly behaviour affects the gas-liquid coexistence. We vary the distance between the repulsive and the attractive lobes (bond length), and the interaction range, and follow the evolution of the gas-liquid (GL) coexistence curve. We find that upon increasing the bond length distance the binodal line shifts to lower temperatures, and that the interaction range controls the transition between phase separation and self-assembly of clusters. Upon further reduction of the interaction range and temperature, the clusters assume an increasingly ordered tube-like shape, ultimately matching the one previously reported in literature. These results are of interest when designing particle shape and particle-particle interaction for self-assembly processes.

References in corpus (11)

• Phase diagram of patchy colloids: towards empty liquids
• Critical point and coexistence curve properties of the Lennard-Jones fluid: A finite-size scaling study
• Phase Equilibria of Lattice Polymers from Histogram Reweighting Monte Carlo Simulations
• A numerical study of one-patch colloidal particles: from square-well to Janus
• On the possibility of extending the Nore-Frenkel generalized law of correspondent states to non-isotropic patchy interactions
• Phase Behavior of Short Range Square Well Model
• Self-assembly of "Mickey Mouse" shaped colloids into tube-like structures: experiments and simulations
• Critical phenomena in colloid-polymer mixtures: interfacial tension, order parameter, susceptibility and coexistence diameter
• Structure and phase behavior of colloidal dumbbells with tunable attractive interactions
• Computational Study of Trimer Self-Assembly and Fluid Phase Behavior
• Effect of excluded volume interactions on the interfacial properties of colloid-polymer mixtures

Cited by in corpus (3)

• Self-assembly in a model colloidal mixture of dimers and spherical particles
• Extended Wertheim theory predicts the anomalous chain length distributions of divalent patchy particles under extreme confinement
• Early stages of aggregation in fluid mixtures of dimers and spheres: a theoretical and simulation study