Investigation of spectral characteristics of cholesteric liquid crystals at carbohydrates influence

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.65481

Keywords:

spectral studies, cholesteric liquid crystals, carbohydrates, primary converter, optical sensor

Abstract

The concept of cholesteric liquid crystal interaction with carbohydrates to create the active medium of the primary sensor converter is considered. It is proposed to use the cholesteric liquid crystal with the reflection band in the visible spectrum as the sensing element of optical carbohydrate sensors. The information signal in such sensors is formed by selective reflection (transmission) of light in the sensitive medium of primary converters of optical sensors. The analysis of the data shows that the reason for the areas of abnormal behavior of the pitch at high concentrations of the aqueous carbohydrate solution is the interface. It is shown that there is a general tendency to reduce the pitch of the supramolecular helical structure with increasing concentration of aqueous solutions in all investigated carbohydrates. Furthermore, the maximum sensitivity of the cholesteric matrix is observed at low concentrations of the solution used for their detection. The highest spectral sensitivity is observed in aqueous fructose solutions.

Author Biographies

Mariya Vistak, Danylo Halytsky Lviv National Medical University 69 Pekarska str., Lviv, Ukraine, 79010

Candidate of physics and mathematical science, Associate professor

Department of Biophysics 

Vasyl Dmytrakh, Danylo Halytsky Lviv National Medical University 69 Pekarska str., Lviv, Ukraine, 79010

Teacher

Department of Biophysics 

Yulia Horbenko, Ivan Franko National University of Lviv 8 Kyrylo and Mefodiya str., Lviv, Ukraine, 79005

Junior Researcher

Department of Physical and Colloid Chemistry

Orest Sushynskyi, Lviv Polytechnic National University 13 Bandery str., Lviv, Ukraine, 79013

Doctor of technical science, Associate professor

Department of electronic devices 

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Published

2016-04-27

How to Cite

Vistak, M., Dmytrakh, V., Horbenko, Y., & Sushynskyi, O. (2016). Investigation of spectral characteristics of cholesteric liquid crystals at carbohydrates influence. Eastern-European Journal of Enterprise Technologies, 2(6(80), 18–22. https://doi.org/10.15587/1729-4061.2016.65481

Issue

Vol. 2 No. 6(80) (2016): Technology organic and inorganic substances

Section

Technology organic and inorganic substances

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Copyright (c) 2016 Mariya Vistak, Vasyl Dmytrakh, Yulia Horbenko, Orest Sushynskyi

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