Advances in Colloidal Assembly: The Design of Structure and Hierarchy in Two and Three Dimensions

Vogel, Nicolas; Retsch, Markus; Fustin, Charles-André; Campo, Aránzazu del; Jonas, Ulrich

doi:10.1021/cr400081d

Cited by 647 publications

(694 citation statements)

References 498 publications

(1,068 reference statements)

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“…The self-assembly of colloidal particles in three dimensions creates closepacked structures with long-range order if the particles are sufficiently similar in size and if the assembly process is well-controlled. [54][55][56] The colloids assemble in a face-centered cubic crystal structure with periodicities in the hundred-nanometer range, as defined by the individual colloidal particle size. Colloidal crystals, for example in Figure 3A, are also known as opals.…”

Section: Control Over Structural Features In Colloidal Assembliesmentioning

confidence: 99%

“…The assembly of two-dimensional (2D) arrays of colloidal particles creates surface patterns with nanoscale dimensions and high order, with a resolution determined solely by the size of the colloids ( Figure 4A). Such monolayers can be deposited directly onto solid substrates via evaporation-driven convective assembly processes, [106][107][108] spincoating, 109 electric field-assisted deposition, 55,110 or mechanical rubbing of dry powders. 111,112 They can also be pre-assembled at a liquid interface and subsequently transferred to a solid substrate.…”

Section: (D) Multiple Porositiesmentioning

confidence: 99%

“…[149][150][151][152] The assembly conditions themselves are precisely adjusted to create superstructures, for example stripe patterns can form in a convective assembly process. 153,154 Alternatively, a preferred site for the colloidal assembly can be created via assembly on a substrate that is patterned either physically (topographically) 55,101,149 ( Figure 4C,ii) or chemically (wetting contrast, differences in adhesion). 55,155 (D) Superparticles.…”

Section: (D) Multiple Porositiesmentioning

confidence: 99%

“…153,154 Alternatively, a preferred site for the colloidal assembly can be created via assembly on a substrate that is patterned either physically (topographically) 55,101,149 ( Figure 4C,ii) or chemically (wetting contrast, differences in adhesion). 55,155 (D) Superparticles. We define superparticles as dispersible particles on the 10-1000 µm scale that are comprised of colloids in their internal structure.…”

Section: (D) Multiple Porositiesmentioning

confidence: 99%

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A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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Nature evolved a variety of hierarchical structures that produce sophisticated functions. Inspired by these natural materials, colloidal self-assembly provides a convenient way to produce structures from simple building blocks with a variety of complex functions beyond those found in nature. In particular, colloid-based porous materials (CBPM) can be made from a wide variety of materials. The internal structure of CBPM also has several key attributes, namely porosity on a sub-micrometer length scale, interconnectivity of these pores, and a controllable degree of order. The combination of structure and composition allow CBPM to attain properties important for modern applications such as photonic inks, colorimetric sensors, self-cleaning surfaces, water purification systems, or batteries. This review summarizes recent developments in the field of CBPM, including principles for their design, fabrication, and applications, with a particular focus on structural features and materials' properties that enable these applications. We begin with a short introduction to the wide variety of patterns that can be generated by colloidal self-assembly and templating processes. We then discuss different applications of such structures, focusing on optics, wetting, sensing, catalysis, and electrodes. Different fields of applications require different properties, yet the modularity of the assembly process of CBPM provides a high degree of tunability and tailorability in composition and structure. We examine the significance of properties such as structure, composition, and degree of order on the materials' functions and use, as well as trends in and future directions for the development of CBPM.

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Section: Control Over Structural Features In Colloidal Assembliesmentioning

confidence: 99%

Section: (D) Multiple Porositiesmentioning

confidence: 99%

Section: (D) Multiple Porositiesmentioning

confidence: 99%

Section: (D) Multiple Porositiesmentioning

confidence: 99%

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A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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“…In the case of 2D plasmonics and metasurfaces, it is often desirable to fabricate discrete assemblies rather than closed-packed films, and this requires further understanding of hierarchical driving forces (long-range and short-range) for control of resultant architectures. 4 These discrete assemblies are often referred to as oligomers because plasmon hybridization theory intuitively describes the electromagnetic response using an analogy with molecular orbital theory. 5 Nanoparticle colloids thus provide metamolecule building blocks where not only composition, size, and shape of the nanoparticle but the geometry of resultant oligomers, gap spacings, and dielectric environment provide additional degrees of freedom for tuning the electromagnetic response.…”

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confidence: 99%

Driving Chemical Reactions in Plasmonic Nanogaps with Electrohydrodynamic Flow

Thrift

Nguyen

Darvishzadeh-Varcheie

et al. 2017

ACS Nano

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Nanoparticles from colloidal solutionwith controlled composition, size, and shapeserve as excellent building blocks for plasmonic devices and metasurfaces. However, understanding hierarchical driving forces affecting the geometry of oligomers and interparticle gap spacings is still needed to fabricate high-density architectures over large areas. Here, electrohydrodynamic (EHD) flow is used as a long-range driving force to enable carbodiimide cross-linking between nanospheres and produces oligomers exhibiting sub-nanometer gap spacing over mm 2 areas. Anhydride linkers between nanospheres are observed via surface-enhanced Raman scattering (SERS) spectroscopy. The anhydride linkers are cleavable via nucleophilic substitution and enable placement of nucleophilic molecules in electromagnetic hotspots. Atomistic simulations elucidate that the transient attractive force provided by EHD flow is needed to provide a sufficient residence time for anhydride cross-linking to overcome slow reaction kinetics. This synergistic analysis shows assembly involves an interplay between long-range driving forces increasing nanoparticle− nanoparticle interactions and probability that ligands are in proximity to overcome activation energy barriers associated with short-range chemical reactions. Absorption spectroscopy and electromagnetic full-wave simulations show that variations in nanogap spacing have a greater influence on optical response than variations in close-packed oligomer geometry. The EHD flow−anhydride cross-linking assembly method enables close-packed oligomers with uniform gap spacings that produce uniform SERS enhancement factors. These results demonstrate the efficacy of colloidal driving forces to selectively enable chemical reactions leading to future assembly platforms for large-area nanodevices.

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Bimetallic Nanoframes and Nanoporous Structures

Zhang

Fang

et al. 2018

Bimetallic Nanostructures

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Advances in Colloidal Assembly: The Design of Structure and Hierarchy in Two and Three Dimensions

Cited by 647 publications

References 498 publications

A colloidoscope of colloid-based porous materials and their uses

A colloidoscope of colloid-based porous materials and their uses

Driving Chemical Reactions in Plasmonic Nanogaps with Electrohydrodynamic Flow

Bimetallic Nanoframes and Nanoporous Structures

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