Asymmetric assembly of Lennard-Jones Janus dimers

Safaei, Sina; Todd, Caleb; Yarndley, Jack; Hendy, Shaun C.; Willmott, Geoff R.

doi:10.1103/physreve.104.024602

Cited by 3 publications

(3 citation statements)

References 59 publications

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“…Recent advances in mesoscale fabrication have allowed for the construction of anisotropic colloidal particles that are anticipated to self-assemble into novel structure so as to unlock new material properties. − One example is the prediction of richer phase behavior for anisotropic colloidal materials ,− as can exist in gas, liquid, crystalline, or amorphous phases due to the order between particles in analogy with atomic materials. The Janus structurewherein spherical particles have two chemically distinct hemispheresis one such anisotropic colloid particle structure that has warranted much attention through experiment, ,,− theory, − and simulation. ,− …”

Section: Introductionmentioning

confidence: 99%

Bottom-Up Construction of the Interaction between Janus Particles

Popov

Hernandez

2023

J. Phys. Chem. B

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While the interaction between two uniformly charged spheres�viz colloids�is well-known, the interaction between nonuniformly charged spheres such as Janus particles is not. Specifically, the Derjaguin approximation relates the potential energy between two spherical particles with the interaction energy V pl per unit area between two planar surfaces. The formalism has been extended to obtain a quadrature expression for the screened electrostatic interaction between Janus colloids with variable relative orientations. The interaction is decomposed into three zones in the parametric space, distinguished by their azimuthal symmetry. Different specific situations are examined to estimate the contributions of these zones to the total energy. The effective potential V pl is renormalized such that the resulting potential energy is identical with the actual one for the most preferable relative orientations between the Janus particles. The potential energy as a function of the separation distance and the mutual orientation of a pair of particles compares favorably between the analytical (but approximate) form and the rigorous point-wise computational model used earlier. Coarse-grained models of Janus particles can thus implement this potential model efficiently without loss of generality.

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Section: Introductionmentioning

confidence: 99%

Bottom-Up Construction of the Interaction between Janus Particles

Popov

Hernandez

2023

J. Phys. Chem. B

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“…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 …”

Section: Introductionmentioning

confidence: 99%

“…The behavior of JPs can be also manipulated by external magnetic or electric fields, 1 and interfaces 17 the presence of different solvents or isotropic nanoparticles. 18 − 21 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.…”

Section: Introductionmentioning

confidence: 99%

Amphiphilic Janus Particles Confined in Symmetrical and Janus-Like Slits

et al. 2023

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We use Monte Carlo simulations to investigate the behavior of Janus spheres composed of attractive and repulsive parts confined between two parallel solid surfaces. The slits with identical and competing walls are studied. The adsorption isotherms of Janus particles are determined, and the impact of the density in the pore on the morphology is discussed in detail. So far, this issue has not been systematically investigated. New, unique structures are observed along the isotherms, including the bilayer and three-layer structures located at different distances from the walls. We analyze how selected parameters affect the positional and orientational ordering in these layers. In some cases, the particles form highly ordered hexagonal lattices.

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