Abstract
Based on the anchoring effect due to the self-assembling behavior of the phospholipid molecules at the interface between the liquid crystal and water phases on the orientation of liquid crystals, the optical response associated with the orientation and structure of liquid crystals with respect to the concentration of 1,2-didodecanoyl-sn-glycero-3-phosphocholine solution has been investigated. The optical response owing to changes in the orientation and structure of the mixed cholesteric liquid crystals with respect to the change in the concentration of phosphatidylcholine has been obtained. Moreover, the feasibility of using as-prepared mixed cholesteric liquid crystals to measure the phosphatidylcholine concentration has been verified. A methodology to measure the reflectance spectrum by using mixed cholesteric liquid crystals to sensitize the phosphatidylcholine concentration has been further realized. The sensitization effect of the mixed cholesteric liquid crystals on the measurement of phosphatidylcholine concentration was also verified.
Highlights
Plenty of liquid-crystal-state biological tissue primitives, such as proteins, lipids, polysaccharides, etc., are available in the biological systems
It can be observed from the experimental findings that the wavelength of the selective reflected light of the 100% cholesteryl ester liquid crystals hardly shifts with the concentration of the 1,2-didodecanoyl-sn-glycero-3-phosphocholine solution
In the wavelengths wavelengthsof ofthe thelight lightreflected reflectedbybymixed mixed cholesteric liquid crysIn this this study, the cholesteric liquid crystals tals respect the concentration of 1,2-didodecanoyl-sn-glycero-3-phosphocholine withwith respect to thetoconcentration of 1,2-didodecanoyl-sn-glycero-3-phosphocholine solution solution were basing studiedonbasing on the anchoring effect associated with the self-assembling were studied the anchoring effect associated with the self-assembling behavior of the phospholipid molecules at the interface between the liquid and the water behavior of the phospholipid molecules at the interface between the crystal liquid crystal and the phasesphases on theon orientation of the of liquid crystals
Summary
Plenty of liquid-crystal-state biological tissue primitives, such as proteins, lipids, polysaccharides, etc., are available in the biological systems. Studies on the liquid-crystal-state conformation of the biological tissue primitives have attracted significant research attention for bio-sensing. These studies include the verification of the presence of the liquid crystal phase in the biological systems via novel physical and chemical methods as well as investigation of the effect of the biochemical substances on the liquid crystal state of the phases. It has been proved that the changes in the helical structures of the cholesteric liquid crystals can be characterized by using the transmittance spectrum of the side-polished optical fiber [9]. The findings obtained in this study lay the foundation for the development of a side-polished fiber optic biosensors based on the liquid crystal media
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