Infiltration of silica colloidal crystals with molten salts and semiconductors under capillary forces

Kurdyukov, D. A.; Картенко, Н. Ф.; Голубев, В. Г.

doi:10.1016/j.jallcom.2009.11.193

Cited by 13 publications

(8 citation statements)

References 41 publications

(50 reference statements)

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“…[31,32] The templating approach is attractive because most materials do not form complex deterministic structures naturally. [33][34][35][36][37][38][39] The goal is to synthesize new materials with properties that emerge from synergistic interactions of the inherent properties of the constituent materials and the template structure. [33][34][35][36][37][38][39] The goal is to synthesize new materials with properties that emerge from synergistic interactions of the inherent properties of the constituent materials and the template structure.…”

Section: Templating Overviewmentioning

confidence: 99%

“…[31] Techniques including electrodeposition, capillary action, sol-gel templating, and drop casting have all been used to infill preformed templates, enabling replication and/or inversion of the template geometry with the functional material of interest. [33][34][35][36][37][38][39] The goal is to synthesize new materials with properties that emerge from synergistic interactions of the inherent properties of the constituent materials and the template structure. [31,32,40,41] Along with photonic applications, template-replicated and inverted structures have also been used for electrochemical energy storage, sensing, and high-strength applications as discussed below.…”

Section: Templating Overviewmentioning

confidence: 99%

See 1 more Smart Citation

Template‐Directed Solidification of Eutectic Optical Materials

Kulkarni

Kohanek

Tyler

et al. 2018

Advanced Optical Materials

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polarizers, some waveguides, and many lasers. [1][2][3] Materials with powerful optical functionalities, including negative-index of refraction and optical chirality, can be realized by appropriate placement of materials with suitable properties in 2D or 3D space. [4][5][6] Light in the visible spectrum can be manipulated, although the tolerance for defects is exceedingly low at visible frequencies, and the number of materials with the appropriate properties is limited. [7,8] Most photonic crystals are fabricated by high-resolution top-down 2D patterning methods such as electron-beam lithography, interference lithography, and focused ion beam milling. [9] However, it is challenging to fabricate large-area bulk materials with these techniques, especially with intricate internal structures. [8] Additionally, many materials with promising optical properties are not compatible with these top-down patterning methods. [4,10] As work on colloidal crystals has shown, controlled self-assembly is an effective route to organizing materials into 3D architectures, which interact strongly with light. [9][10][11][12][13] Colloidal self-assembly, however, only offers a limited set of symmetries (generally those of close packed arrangements), and a spherical basis. [12] For many applications, considerably more complex structures are of interest. Particularly promising approaches for forming materials with complex internal microstructures include eutectic solidification and block copolymer self-assembly, [14][15][16][17] and materials with interesting optical properties have been reported using both approaches. These methods are advantageous due to the wide range of microstructures they form. Here, we focus on the structures formed by eutectic solidification since materials with a broader range of optical properties are available compared to that provided by block copolymers, and because the characteristic lengths of structures accessible through eutectic solidification better match the wavelengths of visible and IR light. Further, forming materials with sufficiently large characteristic dimensions for interaction with visible light by block copolymer assembly is synthetically challenging as it requires high molecular weight polymers. [18] Similarly, self-assembly of other building blocks, e.g., nanoparticles, [19,20] molecules, [21,22] and DNA, [23,24] tend to produce structures with characteristic dimensions too small to provide strong light-matter interactions (via diffractive phenomena), [2,3,25] and are thus not the emphasis of this review.Mesostructured materials can exhibit enhanced light-matter interactions, which can become particularly strong when the characteristic dimensions of the structure are similar to or smaller than the wavelength of light. For controlling visible to near-infrared wavelengths, the small characteristic dimensions of the required structures usually demand fabrication by sophisticated lithographic techniques. However, these fabrication methods are restricted to producing 2D and a limited range of 3D...

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Section: Templating Overviewmentioning

confidence: 99%

Section: Templating Overviewmentioning

confidence: 99%

Template‐Directed Solidification of Eutectic Optical Materials

Kulkarni

Kohanek

Tyler

et al. 2018

Advanced Optical Materials

View full text Add to dashboard Cite

show abstract

“…The porosity may also create additional functionality. For example, the infiltration of colloidal crystals provides a method to create ordered dielectric materials with tuneable optical band gaps . For the preparation of nanostructured materials with macroscopic dimensions, e.g., for structural materials, longer infiltration times might be required or pressure might be needed to achieve pore filling in a shorter amount of time.…”

Section: Practical Aspectsmentioning

confidence: 99%

“…Alternatively, a reactive metal is added to the infiltrate, such as Mg or Li, to improve wetting by reaction with the template surface and thereby lowering the solid–liquid interface tension . This principle has been applied for example by Kurdyukov et al, where infiltration of a colloidal silica crystal with InSb alloy only took place after Sb reacted with the silica surface . It should be noted that some metals have an appreciable vapour pressure at the melting point, therefore active material is lost if melt infiltration is performed in an open atmosphere.…”

Section: Practical Aspectsmentioning

confidence: 99%

Melt Infiltration: an Emerging Technique for the Preparation of Novel Functional Nanostructured Materials

2013

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The rapidly expanding toolbox for design and preparation is a major driving force for the advances in nanomaterials science and technology. Melt infiltration originates from the field of ceramic nanomaterials and is based on the infiltration of porous matrices with the melt of an active phase or precursor. In recent years, it has become a technique for the preparation of advanced materials: nanocomposites, pore-confined nanoparticles, ordered mesoporous and nanostructured materials. Although certain restrictions apply, mostly related to the melting behavior of the infiltrate and its interaction with the matrix, this review illustrates that it is applicable to a wide range of materials, including metals, polymers, ceramics, and metal hydrides and oxides. Melt infiltration provides an alternative to classical gas-phase and solution-based preparation methods, facilitating in several cases extended control over the nanostructure of the materials. This review starts with a concise discussion on the physical and chemical principles for melt infiltration, and the practical aspects. In the second part of this contribution, specific examples are discussed of nanostructured functional materials with applications in energy storage and conversion, catalysis, and as optical and structural materials and emerging materials with interesting new physical and chemical properties. Melt infiltration is a useful preparation route for material scientists from different fields, and we hope this review may inspire the search and discovery of novel nanostructured materials.

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“…For preparing colloidal crystals, vertical deposition (abbreviated as VD) method introduced by Colvin et al [24] has gained considerable attentions [25,26]. Monodisperse colloidal sphere dispersions are left to evaporate naturally to deposit high-quality thin films on a vertically held substrate by the meniscus of an evaporating solvent.…”

Section: Introductionmentioning

confidence: 99%