Synthesis of Colloidal Molecules: Recent Advances and Perspectives

Merindol, Rémi; Duguet, Étienne; Ravaine, Serge

doi:10.1002/asia.201900962

Cited by 20 publications

(20 citation statements)

References 83 publications

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“…The colloidal science domain is replete with synthetic strategies for patchy colloidal molecules, [ 25–34 ] anisotropic metallic colloids, [ 30,35 ] Janus particles, [ 36,37 ] and other polyhedra. [ 32,38–40 ] However, there is a demand to synthesize nonspherical microparticles with multiple facets that are not accessible via wet chemical or gas‐phase methods.…”

Section: Figurementioning

confidence: 99%

Capillary Assembly of Liquid Particles

Shillingford

Kim

Weck

2020

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Positional ordering, patterning, and crystallographic structuring of materials are requisite for device fabrication at the nano/ microscale. Template-directed capillary assembly of colloidal particles [1] precisely controls the placement of nano/microscale objects into surface patterns for the generation of nano/microarrays and colloidal superstructures. [2][3][4][5] The method entails evaporation of particle suspensions comprised of polymer colloids, [6][7][8][9][10] metallic nanoparticles, [11][12][13][14][15][16][17][18] or biomolecules [19][20][21] onto rigid or elastomeric substrates patterned with ordered cavities. Both 2D and 3D microarrays and colloidal clusters ensue with potential uses as optical materials, photonic bandgap structures, sensors, and substrates for epitaxial growth of more complex colloidal materials.The scope of surface patterns that can be produced with techniques such as photolithography, soft lithography, and electron beam lithography, enables precise control of geometry and organization of nano/micro-objects. Using these techniques, particles can either be deposited individually with Capillary assembly is a versatile method for depositing colloidal particles within templates, resulting in nano/microarrays and colloidal superstructures for optical, plasmonic, and sensory applications. Liquid particles (LPs), comprised of oligomerized 3-(trimethoxysilyl)propyl methacrylate, are herein shown to deposit into patterned cavities via capillary assembly. In contrast to solid colloids, LPs coalesce upon solvent evaporation and assume the geometry of the template. Incorporating small molecules such as dyes followed by LP solidification generates fluorescent polymer microarrays of any geometry. The LP size is inversely proportional to the quantity of deposited material and the convexity of the final polymer array. Cavity filling can be tuned by increasing the assembly temperature. Extraction of the polymerized regions produces solidified particles with faceted shapes including square prisms, trapezoids, and ellipsoids with sizes up to 14 µm that retain the shape of the cavity in which they are initially held. LP deposition thus presents a highly controllable fabrication scheme for geometrically diverse polymer microarrays and anisotropic colloids of any conceivable polygonal shape due to space filling of the template. The extension of capillary assembly to LPs that can be doped with small molecule dyes and analytes invaluably expands the synthetic toolbox for top-down, scalable, hierarchically engineered materials. www.advancedsciencenews.com

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Section: Figurementioning

confidence: 99%

Capillary Assembly of Liquid Particles

Shillingford

Kim

Weck

2020

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“… 12 Recently, great progress has been made in the development of synthetic strategies to form such particle clusters. 13 These strategies are mainly based on either the growth of particles on the surface of a preformed particle, via phase-separation phenomena or surface nucleation and growth, or the controlled assembly of presynthesized particles via attractive interactions such as DNA hybridization, electrostatic interactions, and/or van der Waals forces. 14 These synthetic methods typically use spherical particles, such as silica, polymers, and inorganic particles.…”

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confidence: 99%

Assembly of Colloidal Clusters Driven by the Polyhedral Shape of Metal–Organic Framework Particles

et al. 2021

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Control of the assembly of colloidal particles into discrete or higher-dimensional architectures is important for the design of myriad materials, including plasmonic sensing systems and photonic crystals. Here, we report a new approach that uses the polyhedral shape of metal–organic-framework (MOF) particles to direct the assembly of colloidal clusters. This approach is based on controlling the attachment of a single spherical polystyrene particle on each face of a polyhedral particle via colloidal fusion synthesis, so that the polyhedral shape defines the final coordination number, which is equal to the number of faces, and geometry of the assembled colloidal cluster. As a proof of concept, we assembled six-coordinated (6-c) octahedral and 8-c cubic clusters using cubic ZIF-8 and octahedral UiO-66 core particles. Moreover, we extended this approach to synthesize a highly coordinated 12-c cuboctahedral cluster from a rhombic dodecahedral ZIF-8 particle. We anticipate that the synthesized colloidal clusters could be further evolved into spherical core–shell MOF@polystyrene particles under conditions that promote a higher fusion degree, thus expanding the methods available for the synthesis of MOF–polymer composites.

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“…[1][2][3][4][5][6][7][8][9][10][11] The bottom-up technique of colloidal self-assembly facilitates the formation of well-defined superstructures by controllable and site-specific interactions. [12][13][14][15][16] The efforts to design building blocks with anisotropic properties have seen a transition in the architecture of spherical patchy particles from two-faced Janus colloids to multiblock colloidal particles. 17 Moreover, non-spherical customized colloids of different shapes with single or multiple protrusions have been achieved using multi-step swelling and emulsification techniques to further enhance the anisotropic dimensionality and procure particle assemblies with specific features.…”

Section: Introductionmentioning

confidence: 99%

Design of Functionalized Lobed Particles for Porous Self-Assemblies

Gorai

Rocha

Vashisth

2021

JOM

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Colloidal particles fabricated with anisotropic interactions have emerged as building blocks for designing materials with various nanotechnological applications. We used coarse-grained Langevin dynamics simulations to probe the morphologies of self-assembled structures formed by lobed particles decorated with functional groups. We tuned the interactions between the functional groups to investigate their effect on the porosity of self-assembled structures formed by lobed particles with different shapes (snowman, dumbbell, trigonal planar, tetrahedral, square planar, trigonal bipyramidal, and octahedral) at different temperatures. The dumbbell, trigonal planar, and square planar shaped particles, with planar geometries, form self-assembled structures including elongated chains, honeycomb sheets, and square sheets, respectively. The particles with non-planar geometries (tetrahedral, trigonal bipyramidal, and octahedral) self-assemble into random aggregate morphologies. The structures formed by trigonal bipyramidal and octahedral particles exhibit smaller and homogeneous pores compared to the structures formed by trigonal planar and square planar particles. The porosity in self-assembled structures is substantially enhanced by the functionalization of particles.

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Synthesis of Colloidal Molecules: Recent Advances and Perspectives

Cited by 20 publications

References 83 publications

Capillary Assembly of Liquid Particles

Capillary Assembly of Liquid Particles

Assembly of Colloidal Clusters Driven by the Polyhedral Shape of Metal–Organic Framework Particles

Design of Functionalized Lobed Particles for Porous Self-Assemblies

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