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Film forming material and preparation of surface relief and optically anisotropic structures by irradiating a film of the said material

A technology of photoisomerization and film formation, which is applied in the use of optical devices to transmit the directions of sensing components, optics, and photosensitive materials, and can solve the problems of optical orientation and photodiffusion that have not been studied.

Inactive Publication Date: 2007-09-05
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molecular photochemistry and subsequent photoinduced physical processes such as optical orientation and photodiffusion of these materials have not been investigated.

Method used

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  • Film forming material and preparation of surface relief and optically anisotropic structures by irradiating a film of the said material
  • Film forming material and preparation of surface relief and optically anisotropic structures by irradiating a film of the said material
  • Film forming material and preparation of surface relief and optically anisotropic structures by irradiating a film of the said material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1a

[0085] Example 1a "Recording"

[0086] 54 mg of Alizarin Yellow GG (5-(3-nitrophenylazo)salicylic acid sodium salt produced by Aldrich) was dissolved in 20 ml of distilled water, and 40 µl of a 30% polyethyleneimine aqueous solution was added. The precipitate was isolated by filtration (30 mg after drying) and dissolved in 1 ml THF while discarding the mother liquor. Films approximately 2 [mu]m thick were prepared by casting THF solutions on glass substrates at room temperature in a closed vessel. After drying in air at room temperature for 5 h, the films were irradiated under an interference pattern formed by two linearly cross-polarized beams with planes of polarization at ±45° from the plane of incidence. The irradiation wavelength is 488 nm, and the angle between the beams is about 12°, resulting in a period of 2.3 μm. The intensity of the interference beam is equal to 250mW / cm 2 , the irradiation time is 40min. The 1st order diffraction efficiency measured during the ...

Embodiment 1b

[0087] Example 1b "Recording"

[0088]63 mg of Brilliant Yellow (4,4'-bis(4-hydroxyphenylazo)stylbene-2,2'-disulfonic acid disodium salt produced by Aldrich) was dissolved in 5 ml of methanol and then filtered. 130 mg of 30% polyethyleneimine (Aldrich) in water were added. As some precipitate formed, the solution was left standing and decanted. The red mother liquor was used for membrane preparation. Films approximately 3 [mu]m thick were prepared by casting this solution on glass substrates at room temperature in a closed vessel. After drying in air at room temperature for 5 h, the film was irradiated for 40 min under the conditions described in Example 1a. The 1st order diffraction efficiency of the recorded SRG was measured to be 14.5%.

Embodiment 1c

[0089] Example 1c "Recording"

[0090] To a solution of 80 mg Brilliant Yellow (Aldrich) dissolved in 2 ml methanol was added 130 mg triethoxy-3-aminopropylsilane (Witco Europa SA). After addition of 10 μM concentrated HCl, the solution was allowed to stand. The clear red mother liquor was decanted. Films approximately 3 [mu]m thick were prepared by casting this solution on glass substrates at room temperature in a closed vessel. After drying in air at room temperature for 10 h, the film was irradiated for 30 min under the conditions described in Example 1a. The 1st order diffraction efficiency of the recorded SRG was measured to be 8%.

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PUM

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Abstract

The present invention is directed to a film forming, photoactive, homogeneously mixed material comprising a complex prepared from (a) at least one ionic photosensitive compound which may undergo a photoreaction, selected from photoisomerizations, photocycloadditions and photoinduced rearrangements, and / or (a') at least one photosensitive polyelectrolyte (''second polyelectrolyte'') carrying residues which may undergo said photoreaction, and (b) at least one (''first'') polyelectrolyte carrying charges which are opposite to those of the active groups of the photosensitive material. This material has unique photochemical properties in that non-scattering, optically clear films may prepared therefrom which allow light-induced generation of optical anisotropy and of topological surface structures, e.g. such as surface relief gratings (SRG).

Description

technical field [0001] The present invention generally relates to a novel film-forming material with unique photochemical properties. Non-scattering optically transparent films can be easily prepared from this new material. They enable the photogenesis of optical anisotropy (photo-induced dichroism and birefringence) and topological surface structures such as surface relief gratings (SRGs) therein. The material comprises a complex prepared from at least two components: 1) an anionic or cationic polymer electrolyte and 2) an oppositely charged cationic or anionic photosensitive low molecular weight compound or a second oppositely charged The photosensitive polymer electrolyte of the photosensitive side chain, the photosensitive side chain of the low molecular weight compound and the second polymer electrolyte has E / Z isomerization or can undergo photocycloaddition or photorearrangement reaction or the material is under irradiation. The ability to participate in reactions amon...

Claims

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Application Information

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IPC IPC(8): C08L101/02G02B5/18C08L79/00H01L31/02C08F20/06C08G73/02C08G77/04C08G85/00C08J5/18G01D5/38
CPCG03C1/73
Inventor 约阿希姆·施通佩列昂尼德·戈尔登贝格奥尔佳·库利科夫斯卡
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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