Opaline effect pigments by spray induced self‐assembly on porous substrates

Allard, Dirk; Lange, Birger; Fleischhaker, Friederike; Zentel, Rudolf; Wulf, M.

doi:10.1080/15394450500459358

Cited by 31 publications

(28 citation statements)

References 16 publications

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“…After heating for 90 min at 90 8C they have formed a macroscopic network and their mechanical behaviour was dramatically enhanced, which allows for many possible applications: opals are often used as effect pigments, they can e.g., be applied by ink jet printing. [28] Here a stabilization can either be achieved by coating with a protective layer, or by stabilization of the structure by stabilizing reactions of a functional core-shell opal. It is also possible to crystallize stable artificial bulk opals with a volume of several cubic centimetres (see figure in abstract, upper left).…”

Section: Resultsmentioning

confidence: 99%

Functional Polymer‐Opals from Core–Shell Colloids

Lange

Metz

Tahir

et al. 2007

Macromol. Rapid Commun.

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Colloidal photonic crystals were prepared from monodisperse core–shell particles. The shell is hereby formed from a functional monomer, such as glycidylmethacrylate or different reactive ester monomers, which can perform chemical reactions and the core from a standard monomer, which yields highly monodisperse colloids. It was possible to crystallize the core–shell particles into artificial opals with excellent optical properties. Reactions on the functional surface of the colloids were carried out, which lead to a dramatic rise in the mechanical stability or to a functionalization of His‐tagged silicatein, which acts as nanoreactor to synthesize and immobilize gold nanoparticles from auric acid onto the core–shell colloids.magnified image

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Section: Resultsmentioning

confidence: 99%

Functional Polymer‐Opals from Core–Shell Colloids

Lange

Metz

Tahir

et al. 2007

Macromol. Rapid Commun.

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“…The main reason for the opal-based crystals in comparison to other photonic crystals is that opals may be produced on large areas with comparably little effort with a self organization process. 8 An opal consists of touching dielectric nanospheres ordered in a closest package while an inverted opal is a structure formed by touching air nanospheres in a dielectric matrix with a regular filling factor (dielectric material in the unity cell) of 26%. When the inverted opal is produced by a conformal coating method, the filling factor is reduced down to 24%.…”

Section: Optical Properties Of Opals and Inverted Opalsmentioning

confidence: 99%

3D photonic crystals for photon management in solar cells

et al. 2010

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Light management in single and tandem solar cells is becoming increasingly important to optimize the optical and electro-optical properties of solar cells. After a short introduction to state-of-the-art light management approaches, different applications of photonic crystals for photon management in solar cells are reviewed and discussed concerning their applicability. Results on direction- and energy-selective filters for ultra-lighttrapping, intermediate reflectors for optimal current matching in tandem cells, and photonic crystal coating for fluorescence collectors will be presented and discussed

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“…Suitable substrates are especially porous materials such as paper. [55] New Chemistry for Functional Opals While the packing of monodisperse colloids hardly depends on the material they consist of, new chemical approaches are needed to realize functional opals and their functional inverted structures. The research is especially focused on four topics:…”

Section: State Of the Artmentioning

confidence: 99%

Chemical Approach to Functional Artificial Opals

Lange

Fleischhaker

Zentel

2007

Macromol. Rapid Commun.

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Artificial opals are self‐assembled colloidal crystals, which consist of a cubic dense packing (fcc) of hard (not film‐forming) colloids with diameters ranging from 200 to 900 nm. Because of their periodic nanostructure the assemblies are able to reflect light that matches their periodicity, i.e., UV‐ to IR‐radiation depending on the size of the colloids. Thus, they present a subgroup of ‘photonic crystals’. While, originally, the chemistry inside the colloids and the resulting opals was of minor significance, nowadays the chemical variation of opals is becoming more and more important for the preparation of functional and patterned opals. The search for functional opals is, therefore, especially focused on four topics: I) coloring agents, II) incorporation of fluorescent materials, III) replication, and IV) the controlled incorporation of defects.magnified image

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Opaline effect pigments by spray induced self‐assembly on porous substrates

Cited by 31 publications

References 16 publications

Functional Polymer‐Opals from Core–Shell Colloids

Functional Polymer‐Opals from Core–Shell Colloids

3D photonic crystals for photon management in solar cells

Chemical Approach to Functional Artificial Opals

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