Surface-anisotropic spherical colloids in geometric and field confinement

Kretzschmar, Ilona; Song, Jung Hun

doi:10.1016/j.cocis.2011.01.002

Cited by 71 publications

(62 citation statements)

References 72 publications

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“…The ground state of the confined SARR model is 2 h -degenerate with all the particles in a given layer aligned along the x or the y direction. We note that geometrical confinement is also used to assist the selfassembly process of 3D systems and thus the study of confinement is also of some practical relevance [14].…”

Section: Confined Sarr Modelmentioning

confidence: 99%

The nature of the ordered phase of the confined self-assembled rigid rod model

Almarza

Tavares

Gama

2012

The Journal of Chemical Physics

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We investigate the nature of the ordered phase and the orientational correlations between adjacent layers of the confined three-dimensional self-assembled rigid rod model, on the cubic lattice. We find that the ordered phase at finite temperatures becomes uniaxial in the thermodynamic limit, by contrast to the ground state (partial) order where the orientation of the uncorrelated layers is perpendicular to one of the three lattice directions. The increase of the orientational correlation between layers as the number of layers increases suggests that the unconfined model may also exhibit uniaxial ordering at finite temperatures.

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Section: Confined Sarr Modelmentioning

confidence: 99%

The nature of the ordered phase of the confined self-assembled rigid rod model

Almarza

Tavares

Gama

2012

The Journal of Chemical Physics

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“…[21][22][23] More complex nano-and microscale architectures can be organized with dispersions containing particles of dissimilar polarizability. 24,25 For example, colloidal ''flowers'' and mixed crystals have been assembled by applying external magnetic fields to bi-or tri-disperse microparticles. [26][27][28] In these cases, the symmetry of the equilibrium colloidal structure is determined by the strength of the applied field, and the relative magnetic polarizability of the medium and particles.…”

Section: Introductionmentioning

confidence: 99%

Multidirectional colloidal assembly in concurrent electric and magnetic fields

et al. 2016

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a Dipolar interactions between nano-and micron sized colloids lead to their assembly into domains with well-defined local order. The particles with a single dipole induced by an external field assemble into linear chains and clusters. However, to achieve the formation of multidirectionally organized nano-or microassemblies with tunable physical characteristics, more sophisticated interaction tools are needed.Here we demonstrate that such complex interactions can be introduced in the form of two independent, non-interacting dipoles (double-dipoles) within a microparticle. We show how this can be achieved by the simultaneous application of alternating current (AC)-electric field and uniform magnetic field to dispersions of superparamagnetic microspheres. Depending on their timing and intensity, concurrent electric and magnetic fields lead to the formation of bidirectional particle chains, colloidal networks, and discrete crystals. We investigate the mechanistic details of the assembly process, and identify and classify the non-equilibrium states formed. The morphologies of different experimental states are in excellent correlation with our theoretical predictions based on Brownian dynamics simulations combined with a structural analysis based on local energy parameters. This novel methodology of introducing and interpreting double-dipolar particle interactions may assist in the assembly of colloidal coatings, dynamically reconfigurable particle networks, and bidirectional active structures.

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Section: Introductionmentioning

confidence: 99%

“…Functionalized colloidal particles with patches on their surfaces (patchy particles) are promising candidates for the individual constituents, as they allow control of both the valence (number of neighboring particles) and the local structure [7][8][9][10][11][12][13][14][15][16][17]. Equilibrium studies of patchy particle systems revealed rich phase diagrams depending on temperature and density, and in novel ways on the number and type of patches [12,18,19]. However, the potential application of these predictions may be compromised, as the feasibility of assembling the new phases is seriously hampered by the kinetic barriers that emerge from the complex particle-particle correlations [20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Patchy Particles in and out of Equilibrium

et al. 2017

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We combine particle-based simulations, mean-field rate equations, and Wertheim's theory to study the dynamics of patchy particles in and out of equilibrium, at different temperatures and densities. We consider an initial random distribution of non-overlapping three-patch particles, with no bonds, and analyze the time evolution of the breaking and bonding rates of a single bond. We find that the asymptotic (equilibrium) dynamics differs from the initial (out of equilibrium) one. These differences are expected to depend on the initial conditions, temperature, and density.

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Surface-anisotropic spherical colloids in geometric and field confinement

Cited by 71 publications

References 72 publications

The nature of the ordered phase of the confined self-assembled rigid rod model

The nature of the ordered phase of the confined self-assembled rigid rod model

Multidirectional colloidal assembly in concurrent electric and magnetic fields

Dynamics of Patchy Particles in and out of Equilibrium

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