Colored multilayers from transparent submicrometer spheres

Dushkin, Ceco D.; Nagayama, Kuniaki; Miwa, Tetsuya; Kralchevsky, Peter A.

doi:10.1021/la00036a055

Cited by 128 publications

(101 citation statements)

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“…[82,[216][217] The color strongly depends on colloidal size, lattice orientation, and interparticle spacing. One has to distinguish two different phenomena that lead to the color.…”

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

“…This color is a result of interference of light at parallel planes of the monolayer surface and the substrate. [216][217] Crystallinity is not a requirement for this type of color as the monolayer merely acts as a thin, continuous film. The uniform coloration strongly depends on the size of the particles and can thus be used as a simple means to control the etching process.…”

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

“…In order to explain the spectral features, a theoretical model was adopted from literature and extended to non-closepacked architectures. [216] 126…”

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

“…[216,218] The intensity of the reflected light depends on the path difference between the waves reflected at the air/colloid and the colloid/substrate interface.…”

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

“…When illumination occurs normal to the surface, angular dependencies of the phase shift cancel out [216] and constructive interference is obtained for a path difference of integers (m = 1,2,…) of λ. Non-close-packed monolayers by plasma induced size reduction 127…”

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

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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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“…[82,[216][217] The color strongly depends on colloidal size, lattice orientation, and interparticle spacing. One has to distinguish two different phenomena that lead to the color.…”

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

“…In order to explain the spectral features, a theoretical model was adopted from literature and extended to non-closepacked architectures. [216] 126…”

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

“…[216,218] The intensity of the reflected light depends on the path difference between the waves reflected at the air/colloid and the colloid/substrate interface.…”

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

Section: Color Of the Monolayers As A Means To Control The Etching Prmentioning

confidence: 99%

See 3 more Smart Citations

Surface Patterning with Colloidal Monolayers

Vogel

2012

Springer Theses

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Determining the compacting of latex films upon drying by interference measurements — an approach for the investigation of film formation

et al. 1998

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The decrease of optical thickness of drying latex coatings is measured interferometrically. Through data processing film thickness and polymer volume fraction are obtained, which are a measure of particle spacing and deformation. The applied criterion for film formation is the attainment of a dense polymeric material. In this sense the method can be used to check film formation under a variety of conditions. The kinetics of film formation is monitored as well. Since the method is sensitive to changes in optical properties, different modes of drying can be distinguished. The solids content determined by this method is not averaged over the whole film but represents the exact state of drying at the measured spot. Another advantage is that due to the simple setup of the experiment, it works under a broad variety of conditions and without restrictions regarding the nature of the latex. Also, simultaneous measurements at two angles of incidence allow refractive index independent data interpretation. Drying of different dispersions, both film forming and non‐film forming under the given conditions, has been investigated, demonstrating the potential of the technique.

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Two‐ and three‐dimensional crystallization of polymeric microspheres by micromolding in capillaries

1996

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Micromolding in capillaries (MIMIC) is a novel, simple and convenient procedure for crystallizing microspheres from latex suspensions onto a support, and for delivering microspheres to and assembling them in geometrically confined regions on the surface of substrate (see figure). The principle of the method is outlined, examples are given, and possibilities for applications—e.g., in optical devices and microelectronics—are sketched.

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Colored multilayers from transparent submicrometer spheres

Cited by 128 publications

References 0 publications

Surface Patterning with Colloidal Monolayers

Surface Patterning with Colloidal Monolayers

Determining the compacting of latex films upon drying by interference measurements — an approach for the investigation of film formation

Two‐ and three‐dimensional crystallization of polymeric microspheres by micromolding in capillaries

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