Side-polished fiber as a sensor for the determination of nematic liquid crystal orientation

Han, Yanjun; Chen, Zhe; Cao, Dong; Yu, Jianhui; Li, Haozhi; He, Xiaoli; Zhang, Jun; Luo, Yunhan; Lu, Huihui; Tang, Jieyuan; Huang, Hankai

doi:10.1016/j.snb.2014.02.076

Cited by 28 publications

(13 citation statements)

References 22 publications

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“…SPFs often exhibit longer operating distances or larger surfaces, and thus they tend to have relatively higher sensitivity. According to the findings of previous experiments, we hypothesize that the orientational changes in nematic liquid crystals can be characterized by SPF-transmitted optical power [23].…”

Section: Introductionsupporting

confidence: 58%

Sensing Characteristics of Side-Polished Fiber Based on the Alterations in Helical Structure of Thermo-Sensitive Cholesteric Liquid Crystals

Han

Jiang

Guo³

2019

Crystals

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Cholesteric liquid crystals (CLCs) are sensitive to environmental temperature changes, and have been employed as a specific intermediary for biosensors. Considering the temperature-dependent structural changes of CLCs, this study aimed to determine the sensing properties of side-polished fibers (SPFs) after coating with CLCs. The experimental results demonstrated that, with regard to the transmitted spectrum, the loss peak of CLC-coated SPFs exhibited a positive linear relationship with temperature changes over a range of 20 to 50 °C. The linear correlation coefficient achieved 97.8% when the temperature increased by 10 °C, and the loss peak drifted by 12.72 nm. The reflectance spectrum of CLCs coated on the polished surface were obtained using optical fiber sensors. The feasibility of measuring the helical structure of CLCs was further verified using SPF transmission spectroscopy. The findings indicated that the transmitted spectrum of SPFs could be adopted to characterize the helical structure of CLCs, which lays a solid foundation for further study on SPF-based biosensors.

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Section: Introductionsupporting

confidence: 58%

Sensing Characteristics of Side-Polished Fiber Based on the Alterations in Helical Structure of Thermo-Sensitive Cholesteric Liquid Crystals

Han

Jiang

Guo³

2019

Crystals

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“…Optical fiber sensors, especially the ones based on evanescent fields, have been gradually applied for sensing in the biological and medical fields due to their small size, low cost, resistance to electromagnetic interference, simple networking, and reuse, among other advantages. In our previous study, it has been reported that the power of the light transmitted in the side-polished optical fiber can be used to characterize the changes in the orientation of the nematic liquid crystals [8]. Furthermore, it has also 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].…”

Section: Introductionmentioning

confidence: 99%

Optical Response Associated with the Orientation and Structure of Liquid Crystals with Respect to Phosphatidylcholine Concentration

Han

Jiang

Guo³

et al. 2021

Crystals

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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.

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“…Chemically functionalized surfaces can be combined with well-defined structures to create even more advanced devices. LCfunctionalized fibers have been investigated by Lagerwall [45] as well as Chen and coworkers [46,47] to serve as vapor sensors with a macroscopic optical response. Alternatively, substrates functionalized with gold nanoparticles were exploited by Haick et al to develop medical sensors that ascertain complex mixtures of volatile organic compounds in breath samples by monitoring, for example, changes in resistivity.…”

Section: Introductionmentioning

confidence: 99%

A Zero‐Power Optical, ppt‐ to ppm‐Level Toxic Gas and Vapor Sensor with Image, Text, and Analytical Capabilities

Prévôt

Nemati

Cull

et al. 2020

Adv Materials Technologies

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Side-polished fiber as a sensor for the determination of nematic liquid crystal orientation

Cited by 28 publications

References 22 publications

Sensing Characteristics of Side-Polished Fiber Based on the Alterations in Helical Structure of Thermo-Sensitive Cholesteric Liquid Crystals

Sensing Characteristics of Side-Polished Fiber Based on the Alterations in Helical Structure of Thermo-Sensitive Cholesteric Liquid Crystals

Optical Response Associated with the Orientation and Structure of Liquid Crystals with Respect to Phosphatidylcholine Concentration

A Zero‐Power Optical, ppt‐ to ppm‐Level Toxic Gas and Vapor Sensor with Image, Text, and Analytical Capabilities

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