Development of Silicon Nanoparticles for Plasmonic Sensing

Defforge, Thomas and Chaix, Arnaud and Kalas, Benjámin and Fried, Miklós and Petrik, Péter (2022) Development of Silicon Nanoparticles for Plasmonic Sensing. In: Colloidal Nanoparticles for Biomedical Applications XVII (SPIE BIOS 2022), 2022. március 3., San Francisco (CA).

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Abstract

The performances of a porous silicon nanorods/gold nanoparticle combination for high sensitivity plasmonic sensing was assessed. First, an innovative synthesis technique was developed in a view to obtain porous silicon particles (nanorods due to their elongated shape) with homogeneous size and shape. The porous silicon nanorods were then spin coated on a glass substrate covered with gold nanoparticles. The combination of the high specific surface area porous silicon nanorods and the plasmonic effect of the Au nanoparticles was tested to form a highly sensitive ellipsometric sensing device. The porous silicon nanorods could be attached to both the plane Au surface and the Au nanoparticles with a specific spectral shift in the reflected polarized light.

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