Novel Pyrochlorelike Crystal with a Photonic Band Gap Self-Assembled Using Colloids with a Simple Interaction Potential

Pattabhiraman, Harini; Avvisati, Guido; Dijkstra, Marjolein

doi:10.1103/physrevlett.119.157401

Cited by 29 publications

(28 citation statements)

References 55 publications

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“…The self-assembly and self-structuring of nanoparticles with designed interactions into target structures represents a promising route, 21,22 and its application to the synthesis of disordered hyperuniform materials is still in its infancy. While disordered hyperuniformity was shown to arise in hard-particle systems as they approach jammed (mechanically stable) states, [23][24][25] the experimental realization of such systems requires applying high pressure to compress the systems, which is challenging.…”

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confidence: 99%

Binary mixtures of charged colloids: a potential route to synthesize disordered hyperuniform materials

Chen

Lomba

Torquato

2018

Phys. Chem. Chem. Phys.

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Disordered hyperuniform materials are a new, exotic class of amorphous matter that exhibits crystal-like behavior, in the sense that volume-fraction fluctuations are suppressed at large length scales, and yet they are isotropic and do not display diffraction Bragg peaks. These materials are endowed with novel photonic, phononic, transport and mechanical properties, which are useful for a wide range of applications. Motivated by the need to fabricate large samples of disordered hyperuniform systems at the nanoscale, we study the small-wavenumber behavior of the spectral density of binary mixtures of charged colloids in suspension. The interaction between the colloids is approximated by a repulsive hard-core Yukawa potential. We find that at dimensionless temperatures below 0.05 and dimensionless inverse screening lengths below 1.0, which are experimentally accessible, the disordered systems become effectively hyperuniform. Moreover, as the temperature and inverse screening length decrease, the level of hyperuniformity increases, as quantified by the "hyperuniformity index". Our results suggest an alternative approach to synthesize large samples of effectively disordered hyperuniform materials at the nanoscale under standard laboratory conditions. In contrast with the usual route to synthesize disordered hyperuniform materials by jamming particles, this approach is free from the burden of applying high pressure to compress the systems.

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confidence: 99%

Binary mixtures of charged colloids: a potential route to synthesize disordered hyperuniform materials

Chen

Lomba

Torquato

2018

Phys. Chem. Chem. Phys.

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“…This crystal structure has been previously observed in silicate compounds (high cristobalite), in triblock Janus particles, 31 , 32 and in a repulsive square shoulder isotropic model. 33 …”

Section: Resultsmentioning

confidence: 99%

Confinement of Colloids with Competing Interactions in Ordered Porous Materials

2020

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In this work, we explore the possibility of promoting the formation of ordered microphases by confinement of colloids with competing interactions in ordered porous materials. For that aim, we consider three families of porous materials modeled as cubic primitive, diamond, and gyroid bicontinuous phases. The structure of the confined colloids is investigated by means of grand canonical Monte Carlo simulations in thermodynamic conditions at which either a cluster crystal or a cylindrical phase is stable in bulk. We find that by tuning the size of the unit cell of these porous materials, numerous novel ordered microphases can be produced, including cluster crystals arranged into close packed and open lattices as well as nonparallel cylindrical phases.

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“…Crystallization and melting are among the most studied phenomena both from fundamental as well as technological points of view. In particular, colloidal crystals are of great interest for developing new novel materials such as optical fibers [4,5], photonic bandgap materials [6][7][8] etc. The volume fraction is one of the most important factors in determining the phase behavior of all the colloidal suspensions.…”

Section: Introductionmentioning

confidence: 99%

Depletion induced demixing and crystallization in binary colloids subjected to an external potential barrier

Mustakim,

Kumar

2021

Preprint

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A binary colloidal mixture of unequal sizes, subjected to an external potential barrier, has been investigated using canonical ensemble molecular dynamics simulations. The attractive depletion interaction between the external barrier and larger species in the binary mixture causes the mixture to phase separate. At higher volume fractions, a pure phase of larger particles forms near the potential barrier, and the local density of this pure phase is high enough that a face centered cubic crystalline domain is formed at this region. This crystalline phase diffuses perpendicular to the external potential barrier. The temperature dependence of diffusivity of larger particles is non-Arrhenius and changes from sub-Arrhenius to super-Arrhenius as the volume fraction increases. This crossover from sub-Arrhenius to super-Arrhenius diffusion coincides with the crystalline formation near the potential barrier.

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Novel Pyrochlorelike Crystal with a Photonic Band Gap Self-Assembled Using Colloids with a Simple Interaction Potential

Cited by 29 publications

References 55 publications

Binary mixtures of charged colloids: a potential route to synthesize disordered hyperuniform materials

Binary mixtures of charged colloids: a potential route to synthesize disordered hyperuniform materials

Confinement of Colloids with Competing Interactions in Ordered Porous Materials

Depletion induced demixing and crystallization in binary colloids subjected to an external potential barrier

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