2019
DOI: 10.1080/02678292.2018.1558462
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Liquid crystal nose, chiral case: towards increased selectivity and low detection limits

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Cited by 20 publications
(11 citation statements)
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“…Schematic representation of swelling of the chiral liquid crystal system which leads to an alteration in magnitude of the chiral pitch, upon interaction with gas molecules. Redrawn from Shibaev et al [ 48 ] …”
Section: Functional Liquid Crystal Materialsmentioning
confidence: 99%
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“…Schematic representation of swelling of the chiral liquid crystal system which leads to an alteration in magnitude of the chiral pitch, upon interaction with gas molecules. Redrawn from Shibaev et al [ 48 ] …”
Section: Functional Liquid Crystal Materialsmentioning
confidence: 99%
“…Finally, a prototype olfaction system (electronic nose) was reported by Shibaev et al, [ 48 ] implementing an array of six different chiral mixtures (containing MBBA, derivatives of cholesterol and a glass forming chiral oligomer), in the form of droplets, with variable viscosities. Each droplet had a different response to VOCs (cyclohexane and acetic acid) depending on the system's viscosity.…”
Section: Functional Liquid Crystal Materialsmentioning
confidence: 99%
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“…In recent years, the detection of organic vapors has been viewed as a hotspot in the field of sensors. Particularly, LC materials have also been adopted for organic vapor sensors [ 128 , 129 , 130 , 131 ], even supramolecular H-bonded LC materials [ 132 ]. It has been reported that a H-bond-bridged cholesteric LCP network was constructed to distinguish between ethanol and methanol as an optical sensor material [ 133 ].…”
Section: Hydrogen-bonded Supramolecular Self-assemblies Of Organicmentioning
confidence: 99%
“… 9 , 10 , 11 An interesting class of such optically VOC-responsive materials is given by liquid crystals (LCs), 12 , 13 which despite their liquid nature exhibit long-range orientational order along a direction called the “director.” 14 This gives them properties normally seen only in crystalline solids, such as birefringence and, in case of chiral LCs, structural color. 15 LCs have been shown to signal exposure to toluene, 16 , 17 , 18 , 19 , 20 acetone, 19 , 21 NO 2 , 22 CO 2 , 23 , 24 , O 2 , 24 amines, 25 cyclohexane and acetic acid, 26 chloroform and ethanol, 27 , 28 isopropanol, 29 tetrahydrofuran, methanol, tetrachloroethylene, 27 pyridine, hexane, and benzene 21 and to VOCs mimicking the nerve gas sarin. 30 , 31 , 32 , 33 Apart from making selectivity to specific VOCs easier than for typical consumer-grade electronic sensors, the non-electronic response of LCs, being fundamentally a VOC-induced change of optical characteristics driven by thermal energy alone, renders them ideal for autonomous sensors that require no power source.…”
Section: Introductionmentioning
confidence: 99%