Materials Fabricated by Micro‐ and Nanoparticle Assembly – The Challenging Path from Science to Engineering

Velev, Orlin D.; Gupta, Shalini

doi:10.1002/adma.200801837

Cited by 392 publications

(380 citation statements)

References 161 publications

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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%

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%

A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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“…Supraballs are spherical colloidal crystals obtained via assembly of monodisperse seeds (0.1-2 µm latex) into larger spheres [82][83] (Fig. 9).…”

Section: Supraballs: Seed Assemblymentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

451

309

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“…[43][44] From a conceptual point of view, all these techniques can be divided into two main categories: direct assembly on a solid substrate and liquid interface-mediated processes. Even though quality, possibilities, and limitations strongly differ between the fabrication techniques, there are certain key differences between the two main categories that shall be briefly discussed before going into detail.…”

Section: Theory 21mentioning

confidence: 99%

Surface Patterning with Colloidal Monolayers

Vogel

2012

Springer Theses

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This thesis focuses on the controlled assembly of monodisperse polymer colloids into ordered two-dimensional arrangements. These assemblies, commonly referred to as colloidal monolayers, are subsequently used as masks for the generation of arrays of complex metal nanostructures on solid substrates.The motivation of the research presented here is twofold. First, monolayer crystallization methods were developed to simplify the assembly of colloids and to produce more complex arrangements of colloids in a precise way. Second, various approaches to colloidal lithography are designed with the aim to include novel features or functions to arrays of metal nanostructures.The air/water interface was exploited for the crystallization of colloidal monolayer architectures as it combines a two-dimensional confinement with a high lateral mobility of the colloids that is beneficial for the creation of high long range order. A direct assembly of colloids is presented that provides a cheap, fast and conceptually simple methodology for the preparation of ordered colloidal monolayers. The produced two-dimensional crystals can be transformed into nonclose-packed architectures by a plasma-induced size reduction step, thus providing valuable masks for more sophisticated lithographic processes. Finally, the controlled co-assembly of binary colloidal crystals with defined stoichiometries on a Langmuir trough is introduced and characterized with respect to accessible configurations and size ratios.Several approaches to lithography are presented that aim at introducing different features to colloidal lithography. First, using metal-complex containing latex particles, the synthesis of which is described as well, symmetric arrays of metal nanoparticles can be created by controlled combustion of the organic material of the colloids. The process does not feature an inherent limit in nanoparticle size and is able to produce complex materials as will be demonstrated for FePt alloy particles. Precise control over both size and spacing of the particle array is presented.Second, two lithographic processes are introduced to create sophisticated nanoparticle dimer units consisting of two crescent shaped nanostructures in close proximity; essentially by using a single colloid as mask to generate two structures simultaneously. Strong coupling processes of the parental plasmon resonances of the two objects are observed that are accompanied by high near-field enhancements. A plasmon hybridization model is elaborated to explain all polarization dependent shifts of the resonance positions. Last, a technique to produce laterally patterned, ultra-flat substrates without surface topographies by embedding gold nanoparticles in a silicon dioxide matrix is applied to construct robust and re-usable sensing architectures and to introduce an approach for the nanoscale patterning of solid supported lipid bilayer membranes.

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Materials Fabricated by Micro‐ and Nanoparticle Assembly – The Challenging Path from Science to Engineering

Cited by 392 publications

References 161 publications

A colloidoscope of colloid-based porous materials and their uses

A colloidoscope of colloid-based porous materials and their uses

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Surface Patterning with Colloidal Monolayers

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