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| Title: | Design of high-performance holographic gratings using siloxane-containing mesogenic compounds |
| Authors: | Kawakami, Yusuke
He, Man
Cho, Yeong Hee |
| Keywords: | holography
siloxane
phase separation
atomic force microscopy
scanning electron microscopy |
| Issue Date: | 2006 |
| Publisher: | International Union of Pure and Applied Chemistry |
| Magazine name: | Pure and Applied Chemistry |
| Volume: | 78 |
| Number: | 10 |
| Start page: | 1835 |
| End page: | 1842 |
| DOI: | 10.1351/pac200678101835 |
| Abstract: | Fine holographic gratings were fabricated using siloxane- and mesogen-containing compounds. A grating with 40 % diffraction efficiency was formed with 10 wt % non-liquid-crystalline 4-methoxyphenyl 4-[4-(pentamethyldisiloxanyl)butoxy]benzoate and trimethylolpropane triacrylate. 4-Methoxyphenyl 4-[4-(1,1,3,3,5,5,5-heptamethyltrisiloxan-1-yl)butoxy]-benzoate gave 50 % diffraction efficiency and angular selectivity of 5°. Siloxane-containing liquid-crystalline compounds were also effective in fabricating fine gratings. These compounds induced distinct phase separation over a concentration range from 6 to 20 wt % in the formation of holographic gratings. The use of ring-opening polymerizable bifunctional epoxides as one of the reactive cross-linking matrix components, together with penta- or tetra-acrylate initiated by 3,3'-carbonylbis(7-diethylaminocoumarin)diphenyliodonium hexafluorophosphate, greatly improved the diffraction efficiency. Fine gratings with 70 and 78 % diffraction efficiency and angular selectivity of 5° were formed with 10 wt % 4-cyano-4'-[(5-heptamethyltrisiloxan-1-yl)pentyloxy]-biphenyl and 4-cyanophenyl 4-[(5-heptamethyltrisiloxan-1-yl)pentyloxy]benzoate using pentaerythritol pentaacrylate-neopentylglycol diglycidyl ether-tripropylene glycol diacrylate (4:5:1) as the polymer matrix component. |
| Rights: | Copyright (C) 2006 International Union of Pure and Applied Chemistry. Yusuke Kawakami, Man He, and Yeong Hee Cho, Pure and Applied Chemistry, 78(10), 2006, 1835-1842. |
| URI: | https://hdl.handle.net/10119/7900 |
| Material Type: | publisher |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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| B9537.pdf | | 353Kb | Adobe PDF | View/Open |
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