All-Nanoparticle Thin-Film Coatings

Lee, Daeyeon; Rubner, Michael F.; Cohen, Robert E.

doi:10.1021/nl061776m

Cited by 602 publications

(470 citation statements)

References 43 publications

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“…Layer-by-layer assembly and spray deposition are commonly used techniques to cover a substrate with disordered colloids for superhydrophilic/phobic coatings ( Figure 13C). [229][230][231] Metal oxide colloids, especially silica, are typically used in layer-by-layer assemblies because they contain surface charges that can be employed for electrostatic binding to a substrate and can be readily functionalized after assembly. When the sizes of these metal oxide particles are below the wavelength of visible light, they form transparent coatings.…”

Section: Factors Affecting Wetting Applicationsmentioning

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: Factors Affecting Wetting Applicationsmentioning

confidence: 99%

A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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“…Sol-gel based approaches with either porosity control and/or high index dopant introduction were reported. [10][11][12] Recently a SiO 2 / TiO 2 GRIN AR coating was reported by Xi et al, 13 by oblique-angle physical vapor deposition, where the refractive index can vary from 1.0 to 2.0.…”

Section: Introductionmentioning

confidence: 99%

Microstructured surface design for omnidirectional antireflection coatings on solar cells

Zhou

Tao

Chen

et al. 2007

Journal of Applied Physics

129

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We recently demonstrated a new process for the formation of partially spherical structures as an omnidirectional antireflection coating ͑omni-AR͒. In this paper, we report the simulation results of the angular and spectral dependences of the total reflectivity on various microstructured surfaces based on the rigorous coupled-wave analysis. Close to zero reflection can be achieved in these microstructured surfaces over an extended spectral region for large ranges of light incident angles. The impact of feature size, density, shape, and refractive index has all been investigated. The experimental results agree reasonably well with the theoretical work. Such an omni-AR structure offers an attractive solution to current crystalline silicon solar cells, as well as future thin film, quantum dot, and organic solar cells.

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“…2,3 Mesoporous optical coatings have been realized by polymer phase separation on the sub-100 nm scale with subsequent removal of one of the phases. 4,5 Other solution-based methods include the fabrication of nanoparticle films by random dense packing 6 or electrostatic attraction, 7 as well as the controlled assembly of charged colloids, 8 hollow 9 or mesoporous 10 silica spheres or polyelectrolyte multilayers. 11 Vacuum-based fabrication approaches are typically relying on glancing angle chemical vapor deposition.…”

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confidence: 99%

Self-Cleaning Antireflective Optical Coatings

et al. 2013

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Low-cost antireflection coatings (ARCs) on large optical surfaces are an ingredient-technology for high-performance solar cells. While nanoporous thin films that meet the zero-reflectance conditions on transparent substrates can be cheaply manufactured, their suitability for outdoor applications is limited by the lack of robustness and cleanability.Here, we present a simple method for the manufacture of robust selfcleaning ARCs. Our strategy relies on the self-assembly of a blockcopolymer in combination with silica-based sol−gel chemistry and preformed TiO 2 nanocrystals. The spontaneous dense packing of copolymer micelles followed by a condensation reaction results in an inverse opal-type silica morphology that is loaded with TiO 2 photocatalytic hot-spots. The very low volume fraction of the inorganic network allows the optimization of the antireflecting properties of the porous ARC despite the high refractive index of the embedded photocatalytic TiO 2 nanocrystals. The resulting ARCs combine high optical and self-cleaning performance and can be deposited onto flexible plastic substrates.

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All-Nanoparticle Thin-Film Coatings

Cited by 602 publications

References 43 publications

A colloidoscope of colloid-based porous materials and their uses

A colloidoscope of colloid-based porous materials and their uses

Microstructured surface design for omnidirectional antireflection coatings on solar cells

Self-Cleaning Antireflective Optical Coatings

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