Sol-gel based optical chemical sensors

Aleksandra Lobnik; Špela Korent Urek; Matejka Turel; Nina Frančič

doi:10.1117/12.886819

6 May 2011 Sol-gel based optical chemical sensors

Aleksandra Lobnik, Špela Korent Urek, Matejka Turel, Nina Frančič

Proceedings Volume 8073, Optical Sensors 2011; and Photonic Crystal Fibers V; 80730V (2011) https://doi.org/10.1117/12.886819
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

Abstract

The growing activity in the field of optical chemical sensors has resulted in numerous sensing schemes, new indicator dyes, various polymeric matrix, size and shapes and highly diversified methods of immobilization. The sensor characteristics are dependent upon the choice of indicator, polymer, immobilization technique, and also size. Sol-gel technology provides a low-temperature method for obtaining porous silicate glass matrices. It enables to obtain material in the form of films, powders, monoliths, fibres or nanoparticles. Organic reagents and molecular receptors can be easily immobilized in the matrices. Moreover, one of the unique features of the sol-gel process is that the properties of the final network structure, such as hydrophobicity, thickness, porosity, flexibility, reactivity and stability can be easily tailored by controlling the process conditions, the type and the size of the precursors and catalysis. Here we will report about several sensor designed over the years based on sol-gel materials for monitoring and controlling different parameters, such as heavy metals, amines, phosphates, organophosphates.

Citation Download Citation

Aleksandra Lobnik, Špela Korent Urek, Matejka Turel, and Nina Frančič "Sol-gel based optical chemical sensors", Proc. SPIE 8073, Optical Sensors 2011; and Photonic Crystal Fibers V, 80730V (6 May 2011); https://doi.org/10.1117/12.886819

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