Liquid Crystal Based Label-Free Optical Sensors for Biochemical Application

Photonic Sensors, Journal Year: 2024, Volume and Issue: 14(2)

Published: April 1, 2024

Abstract Biochemical sensors have important applications in biology, chemistry, and medicine. Nevertheless, many biochemical are hampered by intricate techniques, cumbersome procedures, the need for labeling. In past two decades, it has been discovered that liquid crystals can be used to achieve optical amplification of biological interactions. By modifying recognition molecules, a variety label-free created. Consequently, based on become one most promising sensors. This paper describes detail sensing principle crystals, devices, detection technologies. Meanwhile, latest research findings elucidated. Finally, challenges future directions discussed.

Language: Английский

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Recent progress of in-fiber WGM microsphere resonator

Frontiers of Optoelectronics, Journal Year: 2023, Volume and Issue: 16(1)

Published: May 25, 2023

Abstract In-fiber whispering gallery mode (WGM) microsphere resonators have received remarkable attention due to the superiorities of compact structure, high stability and self-alignment. As an in-fiber WGM been demonstrated in various applications, such as sensors, filters lasers, which significant impacts on modern optics. Herein, we review recent progress resonators, involve fibers diverse structures microspheres different materials. First, a brief introduction is given from applications. Then, focus progresses this field, including couplers based conventional fibers, capillaries micro-structure hollow passive/active microspheres. Finally, future developments are envisioned. Graphical

Language: Английский

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MMF-SMF-MMF optic surface plasmon resonance sensor based on hexagonal plate-like Co(OH)2/TiO2/

Measurement, Journal Year: 2024, Volume and Issue: 226, P. 114007 - 114007

Published: Jan. 6, 2024

Language: Английский

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Highly sensitive fiber-optic chemical pH sensor based on surface modification of optical fiber with ZnCdSe/ZnS quantum dots

Analytica Chimica Acta, Journal Year: 2024, Volume and Issue: 1294, P. 342281 - 342281

Published: Jan. 26, 2024

Language: Английский

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Real-time visual humidity response films of interpenetrating polymer network based on cholesteric liquid crystal and poly (acrylic acid)

Liquid Crystals, Journal Year: 2023, Volume and Issue: 51(3), P. 361 - 370

Published: Dec. 29, 2023

Humidity sensors play a critical role in diverse fields such as agricultural production, medical equipment, and weather forecasting. However, the majority of existing humidity rely on batteries or are relatively costly to construct. In this study, simple, efficient, battery-free visual sensor was developed by combining cholesteric liquid crystal (CLC) with acrylic acid (AA) subsequently curing it form an interpenetrating polymer network (IPN) film. The IPN film changes colour relative (RH). Moreover, has been confirmed that exhibits excellent repeatability, its performance remains unaffected temperature fluctuations. Additionally, relationship between thickness response time is explored research. Through orthogonal experiments involving various proportions CLC, study also scrutinises influence each component films. During transition from 40% RH 90% RH, sample 3 experienced remarkable redshift 123.05 nm reflected wavelength. As for 9, demonstrated outstanding linearity 0.9986. Consequently, experimental outcomes provide strong evidence superior capabilities holds considerable promise practical applications.

Language: Английский

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Hybrid fiber–solid-state laser with 3D-printed intracavity lenses

Optics Letters, Journal Year: 2023, Volume and Issue: 48(24), P. 6549 - 6549

Published: Nov. 21, 2023

Microscale 3D-printing has revolutionized micro-optical applications ranging from endoscopy, imaging, to quantum technologies. In all these applications, miniaturization is key, and in combination with the nearly unlimited design space, it opening novel, best of our knowledge, avenues. Here, we push limits durability by realizing first fiber laser system intra-cavity on-fiber 3D-printed optics. We demonstrate stable operation at over 20 mW output power 1063.4 nm a full width half maximum (FWHM) bandwidth 0.11 37 mW. Furthermore, investigate stability degradation optics Watt levels. The intriguing possibilities afforded free-form microscale allow us combine gain solid-state crystal guidance hybrid concept. Therefore, novel ansatz enables compact integration bulk active media platforms substantial

Language: Английский

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Compact fiber sensor for rapid trypsin detection based on the whispering gallery mode with a liquid crystal microdroplet

Sensors and Actuators B Chemical, Journal Year: 2023, Volume and Issue: 402, P. 135125 - 135125

Published: Dec. 12, 2023

Language: Английский

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UUltra-sensitive liquid crystal-coated microbubble resonator based on whispering gallery mode for penicillin G detection

Optics Letters, Journal Year: 2024, Volume and Issue: 49(24), P. 7230 - 7230

Published: Dec. 2, 2024

Penicillin G detection is of great significance in medical research and disease diagnosis. Liquid crystal (LC), as a branch sensitive materials, has broad application prospect the field biosensing. Herein, liquid crystal-coated silica microbubble resonator (LC-MBR), with high sensitivity for penicillin detection, been proposed demonstrated. Whispering gallery mode (WGM) spectra Q factor exceeding 10 6 were excited through coupling between tapered fiber LC-MBR. The orientation transition LC molecules, combined WGM resonance, amplified target information triggered wavelength blueshifts. LC-MBR was then applied pH achieving 2.51 nm/pH within range 3.8–8.5. This also successfully employed to detect enzymatic reactions penicillinase, limit × 3 U/mL. fabricated sensor offers significant advantages, including simple structure, improved stability, higher across wide range, making it promising candidate future biomedical applications.

Language: Английский

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An interferometric optical fiber sensor based on ion-imprinted sodium alginate for Pb(II) detection

Optical Fiber Technology, Journal Year: 2024, Volume and Issue: 90, P. 104053 - 104053

Published: Dec. 6, 2024

Language: Английский

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Direct Response of Liquid Crystal to pH Changes for Wide Range pH Sensing Via Whispering Gallery Mode

Optics Letters, Journal Year: 2024, Volume and Issue: 49(19), P. 5627 - 5627

Published: Aug. 14, 2024

pH sensing is essential in various fields including healthcare, environmental monitoring, food safety, and agriculture. In this Letter, we propose a method for wide-range measurement based on the direct response of liquid crystal (LC) to variations via whispering gallery mode (WGM). The 4-cyano-4'-pentylbiphenyl (5CB) selected its excellent optoelectronic properties birefringence 5CB microdroplets serving as spherical resonators. This sensor achieves without any intermediaries. Polarized optical microscopy (POM) WGM provide qualitative morphological analysis accurate quantitative spectral measurements. Under alkaline conditions (pH 7.6 13.3), POM images show complete transition from bipolar radial structures, with an average sensitivity 1.78 nm/pH redshift spectra. acidic 6.65 1.5), structural changes observed by are minor, 1.06 blueshift difference attributed varying refractive indices HCl NaOH solutions. offers reference theoretical studies LC interactions holds promise development LC-based sensors.

Language: Английский

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