Anisotropic colloids through non-trivial buckling

Quilliet, Catherine; Zoldesi, C.; Riera, Christophe; Blaaderen, Alfons van; Imhof, Arnout

doi:10.1140/epje/i2007-10365-2

Cited by 74 publications

(101 citation statements)

References 35 publications

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“…Irregular patchy particles that are made by coating of spherical particles are always convex. Colloidal molecules of arbitrary shape and size belong on the other hand to the completely asymmetric colloidal particles that are not convex [65][66][67][68].…”

Section: Geometric Classification Of Colloidal Particlesmentioning

confidence: 99%

Dynamical density functional theory for colloidal particles with arbitrary shape

2011

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Starting from the many-particle Smoluchowski equation, we derive dynamical density functional theory for Brownian particles with an arbitrary shape. Both passive and active (self-propelled) particles are considered. The resulting theory constitutes a microscopic framework to explore the collective dynamical behavior of biaxial particles in nonequilibrium. For spherical and uniaxial particles, earlier derived dynamical density functional theories are recovered as special cases. Our study is motivated by recent experimental progress in preparing colloidal particles with many different biaxial shapes.

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Section: Geometric Classification Of Colloidal Particlesmentioning

confidence: 99%

Dynamical density functional theory for colloidal particles with arbitrary shape

2011

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“…This calls for a better understanding of the interplay between geometry and friction of the indenter-shell contact in determining the mechanical response. At the microscopic scale, colloidal capsules [4,5] can buckle elastically into polygonal configurations, under varying osmotic pressure. Indentation, another mode of mechanical loading, is encountered in the mechanical testing through atomic force microscopy (AFM) of bacteria [6], virus capsids [7,8], and microcapsules [9].…”

Section: Introductionmentioning

confidence: 99%

Localized Structures in Indented Shells: A Numerical Investigation

Nasto

Reis

2014

Journal of Applied Mechanics

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We present results from a numerical investigation of the localization of deformation in thin elastomeric spherical shells loaded by differently shaped indenters. Beyond a critical indentation, the deformation of the shell ceases to be axisymmetric and sharp structures of localized curvature form, referred to as "s-cones," for "shell-cones." We perform a series of numerical experiments to systematically explore the parameter space. We find that the localization process is independent of the radius of the shell. The ratio of the radius of the shell to its thickness, however, is an important parameter in the localization process. Throughout, we find that the maximum principal strains remain below 6%, even at the s-cones. As a result, using either a linear elastic (LE) or hyperelastic constitutive description yields nearly indistinguishable results. Friction between the indenter and the shell is also shown to play an important role in localization. Tuning this frictional contact can suppress localization and increase the load-bearing capacity of the shell under indentation.

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“…[1][2][3][4][5][6][7][8] Such samples were used to experimentally study self-assembly and mesophase behavior. [6][7][8][9][10][11] Concurrently, new simulation techniques were developed to explain the experimentally observed phenomenology and to tackle the complex numerical problems that such investigations bring about.…”

Section: Introductionmentioning

confidence: 99%

Phase diagram of octapod-shaped nanocrystals in a quasi-two-dimensional planar geometry

Graaf

Qiao

et al. 2013

The Journal of Chemical Physics

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Recently, we reported the formation of crystalline monolayers consisting of octapod-shaped nanocrystals (so-called octapods) that had arranged in a square-lattice geometry through drop deposition and fast evaporation on a substrate [W. Qi, J. de Graaf, F. Qiao, S. Marras, L. Manna, and M. Dijkstra, Nano Lett. 12, 5299 (2012)]. In this paper we give a more in-depth exposition on the Monte Carlo simulations in a quasi-two-dimensional (quasi-2D) geometry, by which we modelled the experimentally observed crystal structure formation. Using a simulation model for the octapods consisting of four hard interpenetrating spherocylinders, we considered the effect of the pod length-to-diameter ratio on the phase behavior and we constructed the full phase diagram. The methods we applied to establish the nature of the phase transitions between the various phases are discussed in detail. We also considered the possible existence of a Kosterlitz-Thouless-type phase transition between the isotropic liquid and hexagonal rotator phase for certain pod lengthto-diameter ratios. Our methods may prove instrumental in guiding future simulation studies of similar anisotropic nanoparticles in confined geometries and monolayers.

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Anisotropic colloids through non-trivial buckling

Cited by 74 publications

References 35 publications

Dynamical density functional theory for colloidal particles with arbitrary shape

Dynamical density functional theory for colloidal particles with arbitrary shape

Localized Structures in Indented Shells: A Numerical Investigation

Phase diagram of octapod-shaped nanocrystals in a quasi-two-dimensional planar geometry

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