19.06.2023
R@D Chemical sensors based on 0D/1D/2D porous photonic crystals (“artificial tongue”)
Bragg, rugate and microcavity reflectors with coordinate-dependent spectral and colorimetric response are simulated and studied for chemical sensors. Colorimetric analysis based on colorimetric spaces CIE1931, HSV HSV allows to characterize both static and dynamic, time-varying spectral response of 0D/1D/2D sensor systems without the use of mechanical scanning systems or measuring systems with dispersed elements. The change in the spectrum during adsorption/desorption of the liquid analyte is described using 2x/3x colorimetric parameters in contrast to the traditional method, which is based on the characterization of the parameters of one main interference peak (position of the optical band gap).
The structures will be created by electrochemical etching technology of silicon, which allows to obtain nano-, macro-, meso-porous layers of silicon (porosity from 5% to 95%) and an internal surface area of up to 1000 m2/cm2, which is promising for sensors.
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Contacts:
Docent Ivan Ivanov, ivan.ivanov@knu.ua
Prof. Valeriy Skryshevsky, skryshevsky@knu.ua
Selected publications:
- Ivanov I.I.,Skryshevsky V.A.,Belarouci A. Porous Bragg reflector based sensors: Ways to increase sensitivity, Sensors and Actuators A, 315, 112234, 2020
- I.I. Ivanov., N.I. Klyui, V.A.Skryshevsky, Colorimetric analysis of optical reflection from thin porous silicon for detection of organic liquids, Sensors and Actuators B, 280,102-108, 2019.
- Ivanov I.I., Skryshevsky V.A., Belarouci A., Chemical sensor based on the colorimetric response of porous silicon photonic crystal, 2022, Sensors and Actuators A: Physical, 333, 113309