Two-dimensional nonclose-packed colloidal crystals formed by spincoating

Jiang, Peng; Prasad, Tushar; McFarland, Michael J.; Colvin, Vicki L.

doi:10.1063/1.2218832

Cited by 187 publications

(248 citation statements)

References 33 publications

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“…(C, D) Wafer scale processing of opals via spin-coating. 109,159 Reproduced with permission from the American Chemical Society and AIP Publishing LLC. (E, F) Melt extrusion of core-shell particles can fabricate elastomeric, mechanically stable opals over large areas.…”

Section: (D) Multiple Porositiesmentioning

confidence: 99%

“…Though the presence of shear forces can be detrimental to the order, with a proper choice of colloidal particles, polymerizable matrix material, and a precisely controlled coating protocol, the fabrication of wafer-scale opals and inverse opals can be achieved ( Figure 5C-D). 109,159 Melt extrusion of core-shell colloidal particles is another process that yields colloidal crystals over macroscopic dimensions in an industrial extrusion process. The particles used in this process consist of a hard core and a shell with a low glass transition temperature and are applied in the process as a powder without any solvent.…”

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: (D) Multiple Porositiesmentioning

confidence: 99%

Section: (D) Multiple Porositiesmentioning

confidence: 99%

A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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“…[58][59][60] While first reports simply use spin coating as a means to get small domains of monolayers to be applied to lithographic processes, later contributions focused on optimizing the volatility of the dispersing media. Jiang et al used silica particles dispersed in highly viscous triacrylate monomers paired with sophisticated gradual rotation protocols to produce three-dimensional crystals [58] and non-close-packed monolayers [59] with satisfying order and optical properties.…”

Section: Spin Coatingmentioning

confidence: 99%

“…[59] To overcome the difficulties of using the strong lateral forces of spin coating, they chose dispersions of silica particles with high solid content (~20 wt-.%) in a non-volatile, viscous triacrylate monomer paired with a substrate pretreatment (assembly of 3-acryloxy-propyl-trichlorosilane). A sophisticated spin coating protocol and subsequent photopolymerization of the monomer matrix resulted in the fixation of the silica spheres in an ordered hexagonal arrangement of non-close-packed colloids embedded in a cross-linked polymer matrix with wafer-scale dimensions.…”

Section: Non-close-packed Monolayers By Spin Coatingmentioning

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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“…There have been various methods developed to assemble two-dimensional colloidal crystals [11][12][13][14] . Since the discovery of optical tweezers [15] , optical forces have been widely studied [16][17][18][19] and can be used for the assembly and reconfiguration of particles [20][21][22][23][24] .…”

mentioning

confidence: 99%

Laser-accelerated self-assembly of colloidal particles at the water–air interface

Zhong

Wang

2017

中国光学快报

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We experimentally demonstrate that optical tweezers can be used to accelerate the self-assembly of colloidal particles at a water-air interface in this Letter. The thermal flow induced by optical tweezers dominates the growth acceleration at the interface. Furthermore, optical tweezers are used to create a local growth peak at the growing front, which is used to study the preferential incorporation positions of incoming particles. The results show that the particles surfed with a strong Marangoni flow tend to fill the gap and smoothen the steep peaks. When the peak is smooth, the incoming particles incorporate the crystal homogeneously at the growing front.

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Two-dimensional nonclose-packed colloidal crystals formed by spincoating

Cited by 187 publications

References 33 publications

A colloidoscope of colloid-based porous materials and their uses

A colloidoscope of colloid-based porous materials and their uses

Surface Patterning with Colloidal Monolayers

Laser-accelerated self-assembly of colloidal particles at the water–air interface

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