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Proceedings Article

Optical properties of azo-chromophore attached on the surface of a silica photonic crystal

[+] Author Affiliations
Byoung-Ju Kim, Kwang-Sun Kang

Kyungil Univ. (Korea, Republic of)

Proc. SPIE 8564, Nanophotonics and Micro/Nano Optics, 85640K (November 20, 2012); doi:10.1117/12.999810
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From Conference Volume 8564

  • Nanophotonics and Micro/Nano Optics
  • Zhiping Zhou; Kazumi Wada
  • Beijing, China | November 05, 2012

abstract

Optical properties of a azo-dye attached on the surface of the monodisperse silica photonic crystal have been investigated. The azo-chromophore was covalently attached to a 3-isocyanatopropyl triethoxysilane (ICPTES) having isocynate functional group by a urethane bond formation reaction. The resulting disperse red/ICPTES (DRICP) was attached on the surface of the silica photonic crystal by hydrolysis and condensation reactions. The FTIR spectrum of the resulting product DRICP/silica sphere (DRICPSS) shows no characteristic isocynate absorption peak at 2270 cm-1 and shows a new absorption peat at 1700 cm-1 corresponding the C=O stretching vibration. This result indicates the complete reaction between –N=C=O and –OH. The DRICPSS has weak brownish color when it is dried. The color of the DRICPSS changed to intense red when it is wetted in methanol, ethanol and 2-propanol. The near infrared absorption maximum at 788 nm shifted to 718 nm for the ICPDRSS after wetting in methanol. This system can be applicable to a sensitive alcohol sensor. © (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Byoung-Ju Kim and Kwang-Sun Kang
" Optical properties of azo-chromophore attached on the surface of a silica photonic crystal ", Proc. SPIE 8564, Nanophotonics and Micro/Nano Optics, 85640K (November 20, 2012); doi:10.1117/12.999810; http://dx.doi.org/10.1117/12.999810


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