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Multiphoton photosensitization system

A multi-photon and photosensitizer technology, which is applied to photosensitive materials, optics, and optical components used in optomechanical equipment, can solve problems such as low photosensitivity, slow writing speed, and high laser power, and achieve enhanced multi-photon photosensitivity Effect

Inactive Publication Date: 2006-12-06
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But such work is limited by slow writing speeds and high laser powers due to the low photosensitivity of existing multiphoton-activatable photoreactive compositions.

Method used

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  • Multiphoton photosensitization system

Examples

Experimental program
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Effect test

Embodiment 1

[0172] Multiphoton-Initiated Free Radical Polymerization

[0173] An up-converting inorganic phosphor ((Y 0.86 Yb 0.08 Er 0.06 )O 2 S, Green UC-3 (purchased from AlliedSignal Inc., Seeize, Germany) was used as a multiphoton photosensitizer to polymerize pentaerythritol tetraacrylate (purchased from Sartomer Co., Exton, PA as SR295) to form a hydrogel. Light output from a 980 nm continuous wave laser diode (80 mW on a 9 mm head with feedback photodiode, purchased from Semiconductor Laser International of Binghamton, NY, with an average operating power of 50 mW) was passed through a focusing lens and used to initiate polymerization. The diameter of the focused spot was measured to be 50 micrometers. Therefore, the energy density used to initiate polymerization with the phosphor is only 2×10 3 W / cm 2 . 20 g of SR295 was dissolved in a mixture of 100 g of acrylonitrile and 25 g of water to form a stock solution of the tetraacrylate. To 8 g of the stock solution of the tetr...

Embodiment 2

[0181] Multiphoton-Initiated Cationic Polymerization

[0182] will Epon TM SU-8 (104.25 g, bisphenol A novolac epoxy resin, available from Resolution Performance Products, Houston, TX) was dissolved in propylene glycol methyl ether acrylate (PGMEA) (48.5 g, available from Aldrich, Milwaukee, WI). 5,7-Diiodo-3-butoxy-6-fluorone (H-Nu 470B, purchased from Spectra Group, Ltd. Maumee, OH) (68 mg), 69 mg hexafluoroantimonic acid (4-(2- Hydroxytetradecyloxy)phenyl)phenyliodonium (available as CD1012 from Sartomer Co., Exton, PA) and 5 mg ethyl 4-dimethylaminobenzoate (EDDMAB, available from Aldrich, Milwaukee, WI) were dissolved In a minimal amount of tetrahydrofuran (ca. 1 g) and adding this to 10 g of the above SU-8 / PGMEA solution with stirring, to the resulting mixture was added the up-converting inorganic phosphor (Y 0.8 Yb 0.2 T m 0.00075 )F 3 (34 mg) (an up-converting phosphor of this type is commercially available from Allied Signal Inc., Seeize, Germany) and stirred to...

Embodiment 3

[0185] Writing images via multiphoton-induced radical polymerization

[0186] 90 g of polymethyl methacrylate (PMMA, molecular weight 120,000, purchased from Aldrich, Milwaukee, WI) and 368 g of 1,2-dichloroethane were mixed, and the mixture was stirred overnight to obtain polymethyl methacrylate ( PMMA) stock solution in dichloroethane. The resulting stock solution (15 g) was mixed with 3.5 g of tris(2-hydroxyethyl)isocyanurate triacrylate (available as SR368 from Sartomer Co., Exton, PA) and 3.5 g of alkoxylated trifunctional Acrylates (available as SR 9008 from Sartomer Co., Exton, PA) were mixed, and the resulting mixture was heated and stirred to obtain an acrylate stock solution. 13 mg rose bengal, 13.6 mg 4-(2-hydroxytetradecyloxy)phenylphenyliodonium hexafluoroantimonate (available as CD1012 from Sartomer Co., Exton, PA) and 14.3 mg n-butyltriphenyl Tetramethylammonium borate (available as CGI 437 from Ciba Specialties Chemicals Corp., Tarrytown, NY) was mixed with 0...

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Abstract

A multiphoton-activatable, photoreactive composition comprises: (a) at least one reactive species that is capable of undergoing an acid- or radical-initiated chemical reaction; (b) a photochemically-effective amount of a multiphoton photosensitizer comprising at least one multiphoton up-converting inorganic phosphor; and (c) a photochemically-effective amount of a one-photon photoinitiator system that is capable of being photosensitized by the multiphoton photosensitizer.

Description

technical field [0001] The invention relates to a multiphoton-activatable photoreactive composition, and to a multiphoton method for photon-induced chemical reactions. Background technique [0002] Goppert-Mayer predicted molecular two-photon absorption in 1931. After the invention of the pulsed ruby ​​laser in 1960, experimental observation of two-photon absorption became a reality. Two-photon excitation subsequently found applications in biology, optical data storage, and other fields. [0003] There are two key differences between two-photon-induced photoprocesses and one-photon-induced processes. The magnitude of one-photon absorption is linearly related to the intensity of the incident light, while the magnitude of two-photon absorption is related quadratically to the intensity of the incident light. Higher power absorption is related to higher powers of the incident light intensity. As a result, it is possible to realize multiphoton processes with three-dimensional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/004G03F7/029C08F2/46G02B5/22G03F7/00G03F7/027G03F7/028G03F7/038G03F7/039
CPCG03F7/0037G03F7/0042G03F7/0043G03F7/029G03F7/038G03F7/0385G03F7/039G02B5/22
Inventor J·G·本特森R·J·德沃M·C·帕拉佐洛
Owner 3M INNOVATIVE PROPERTIES CO
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