Self-assembly in two-dimensional mixtures of Janus disks and isotropic particles

Abstract

Using Monte Carlo simulations, we investigate the self-organization of Janus disks and small isotropic particles in two-dimensional systems. In our model, a Janus particle contains an attractive part, A, and an repulsive part, R. The isotropic particles are strongly attracted by the R-part and repelled by the A-part. The number of Janus particles is fixed, while the number of isotropic particles varies. As the concentration of isotropic particles increases, the system structure changes. We show that the size of Janus disks strongly affects the system morphology. In the case of big Janus particles, we have found a lamellar-like phase and a gel-like structure. Different structures are formed in mixtures with smaller Janus particles. At sufficiently high densities of isotropic particles, Janus particles always aggregate into small clusters that are evenly dispersed in the “sea” of isotropic particles. The energies of interactions between both species are analyzed. The mechanism of co-assembly is discussed.

Computer simulations of self-assembly of anisotropic colloids

“…Effect of solvent on the self-assembly of Janus particles is studied in 2D by Borówko et al [97]. They studied selfassembly of a mixture of Janus particles and isotropic particles in two dimensions.…”

Amphiphilic Janus Particles Confined in Symmetrical and Janus-Like Slits

“…The behavior of JPs can be also manipulated by external magnetic or electric fields, and interfaces the presence of different solvents or isotropic nanoparticles. − Another method for the design of unique structures is also to assemble JPs under confinement. This can be realized by the adsorption of JPs on solid surfaces or in different pores. ,,− Recent advances in computer simulations of colloidal self-assembly driven by anisotropic or orientation-dependent interparticle interactions are highlighted in the comprehensive review …”

Self-Assembly of Amphiphilic Janus Particles Confined between Two Solid Surfaces

“…Although much activity so far has focused on two-faced JPs, theoretical studies have also concerned multiblock colloidal spherical particles and particles of different shapes. , Self-assembly of JPs in various environments has been studied, including different solvents, mixtures with isotropic particles, − interfaces, and magnetic or electric fields …”