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Thermally promoted addition of undecylenic acid on thermally hydrocarbonized porous silicon optical reflectors

Tero Jalkanen12*, Ermei Mäkilä2, Tetsuo Sakka1, Jarno Salonen23 and Yukio H Ogata1

Author Affiliations

1 Institute of Advanced Energy, Kyoto University, Uji, Kyoto, 611-0011, Japan

2 Department of Physics and Astronomy, University of Turku, Turku, FI-20014, Finland

3 Turku University Centre for Materials and Surfaces, University of Turku, Turku, FI-20014, Finland

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Nanoscale Research Letters 2012, 7:311  doi:10.1186/1556-276X-7-311

Published: 19 June 2012


Thermally promoted addition of undecylenic acid is studied as a method for modifying porous silicon optical reflectors that have been pre-treated with thermal hydrocarbonization. Successful derivatization of undecylenic acid is demonstrated and confirmed with Fourier transform infrared and X-ray photoelectron spectroscopies. The results indicate that the hydrocarbonization pre-treatment considerably improves stability against oxidation and chemical dissolution in basic environments. The two-step treatment also does not cause an appreciable change on sample reflectance spectra, which enables the use of the functionalized structures in optical sensing applications.

Porous silicon; Interference filter; Optical microcavity; Chemical stability