Modification of porous silicon rugate filters through thiol-yne photochemistry

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Abstract

Porous silicon (PSi) has a considerable potential as biosensor platform. In particular, the ability to modify the surface chemistry of porous silicon is of interest. Here we present a generic method to modify the surface of porous silicon through thiol-yne photochemistry initiated by a radical initiator. Firstly, a freshly etched porous silicon substrate is modified through thermal hydrosilylation with 1,8-nonadiyne to passivate the surface and introduce alkyne functionalities. The alkyne functional surface could then be further reacted with thiol species in the presence of a radical initiator and UV light. Functionalization of the PSi rugate filter is followed with optical reflectivity measurements as well as high resolution X-ray photoelectron spectroscopy (XPS). © 2014 AIP Publishing LLC.

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Soeriyadi, A. H., Zhu, Y., Reece, P., & Gooding, J. J. (2014). Modification of porous silicon rugate filters through thiol-yne photochemistry. In AIP Conference Proceedings (Vol. 1586, pp. 35–38). American Institute of Physics Inc. https://doi.org/10.1063/1.4866725

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