Silk fibroin thin films for optical humidity sensing

Marcin Procek; Zbigniew Opilski; Augusto Márquez Maqueda; Xavier Muñoz Berbel; Salvador D. Aznar-Cervantes; Jose Luis Cenis; Carlos Domínguez Horna

doi:10.1117/12.2536659

13 September 2019 Silk fibroin thin films for optical humidity sensing

Marcin Procek, Zbigniew Opilski, Augusto Márquez Maqueda, Xavier Muñoz Berbel, Salvador D. Aznar-Cervantes, Jose Luis Cenis, Carlos Domínguez Horna

Author Affiliations +

Proceedings Volume 11204, 14th Conference on Integrated Optics: Sensors, Sensing Structures, and Methods; 1120409 (2019) https://doi.org/10.1117/12.2536659
Event: Fourteenth Integrated Optics-Sensors, Sensing Structures and Methods Conference, 2019, Szcyrk-Gliwice, Poland

Abstract

In this paper optical properties of silk fibroin (SF) thin films obtained via spin coating method are investigated. Work concentrates on the experimental examination of influence of relative humidity (RH) in the range of 7-90% in air on the changes of SF refractive index, thickness and optical path at room temperature. Spectral ellipsometry and interference methods are used for the SF thin films optical properties measurements. The sensing structure response value, response time and recovery time are presented. The results shows that RH significantly influenced the SF thin films thickness and refractive index what should be taken into account during the designing of optical devices based on SF. It also shows that SF thin films are promising material for room temperature RH sensors.

Citation Download Citation

Marcin Procek, Zbigniew Opilski, Augusto Márquez Maqueda, Xavier Muñoz Berbel, Salvador D. Aznar-Cervantes, Jose Luis Cenis, and Carlos Domínguez Horna "Silk fibroin thin films for optical humidity sensing", Proc. SPIE 11204, 14th Conference on Integrated Optics: Sensors, Sensing Structures, and Methods, 1120409 (13 September 2019); https://doi.org/10.1117/12.2536659

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