Bovine Serum Albumin Detection by Graphene Oxide Coated Long-Period Fiber Grating

Wang, Ruiduo; Wu, Hao; Qi, Mei; Han, Jing; Ren, Zhaoyu

doi:10.1007/s13320-022-0649-6

Cited by 15 publications

(4 citation statements)

References 35 publications

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“…Graphene and its derivatives, as a two-dimensional material to be exfoliated, has been widely researched in the LPFGs sensing applications owing to its superior optical and optoelectronic properties [28][29][30]. In our trial, the humidity sensing capability of side-polished LPFG is achieved by applying a GO nano-film material coating [31].…”

Section: Humidity Sensing Performancementioning

confidence: 97%

Long-Period Fiber Grating Based on Side-Polished Optical Fiber and Its Sensing Application

Liu

et al. 2023

IEEE Trans. Instrum. Meas.

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A novel side-polished long-period fiber grating (LPFG) sensor was proposed and experimentally validated. Side-polished can provide a stronger evanescent field than traditional grating and bring superior sensitivity. The greater the side-polished depth, the higher the refractive index (RI) sensitivity. When d = 44 μm, the refractive index sensitivity reached 466.85 nm/RIU in the range of 1.3330 -1.3580, which is four-fold higher than LPFG prepared by electric-arc discharge (EAD) method. A graphene oxide (GO) nano-film is coated on the LPFG to make it realize high sensitivity relative humidity (RH) sensing. Humidity sensitivity reached -0.193 nm/%RH in the range of 40 -80% RH. In addition, sidepolished breaks the symmetry of the distribution of the crosssectional light field, which determines the ability to achieve vector curvature measurement. It shows good sensing performance in the same/opposite bending direction as the side polished surface. When the input light polarization is 90°, the average sensitivity reaches 5.03 and -5.9 nm/m -1 in the range of 0 -19.67 m -1 , respectively. This strongly indicates that the fabricated sensors show high sensitivity, low-cost materials, and robust performance and break the limitations of the EDA method to prepare gratings, which have good application potential for biomedicine and the field of construction.

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Section: Humidity Sensing Performancementioning

confidence: 97%

Long-Period Fiber Grating Based on Side-Polished Optical Fiber and Its Sensing Application

Liu

et al. 2023

IEEE Trans. Instrum. Meas.

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“…Compared with the FBG, the LPFG exhibits a forward-propagation cladding mode [124]. The resonance wavelength drift of the LPFG is caused by changes in the surface RI resulting from variations in the gas concentration.…”

Section: Lpfg Gas Sensorsmentioning

confidence: 99%

Recent Advances in Fiber-Optic Sensors for the Detection of Inorganic Acidic Gases

Kong,

Gong,

Zhong

et al. 2024

Photonic Sens

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An acidic gas is an important basic chemical raw material used for synthesizing fertilizers, insecticides, explosives, dyes, and salts. Alternatively, inorganic acidic gases that leak into the air have harmful effects on the human health, infrastructure, and cultural relics. Therefore, the demand for inorganic acidic gas sensors for air quality monitoring and management has continuously increased, enabling the development of various sensing technologies. Among them, fiber-optic sensors are promising for acidic gas detection because of their excellent in-situ measurement, resistance to corrosion, anti-electromagnetic interference, long service life, and smart structure. In particular, fiber-optic sensors have proven to be very useful for the in-situ detection and distributed monitoring of multiple gas parameters. However, the sensitivity, selectivity, repeatability, and limits of detection of these sensors can be improved to achieve acceptable performance levels for practical applications. In this review, we introduce fiber-optic sensors based on structured optical fibers and fiber gratings for detecting H2S, SO2, NO2, CO2, and N2O. The structures of the sensing regions, gas-sensitive materials, and measurement principles of these sensors are presented. The sensitivity, selectivity, limit of detection, and response time of the sensors are summarized. Finally, the future of fiber-optic sensors for the detection of inorganic acidic gases is discussed.

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“…The LOD of 0.02 mg/mL in various interfering compounds was obtained. More recently, the same group developed a biosensor with the same structure for bovine serum albumin (BSA) detection [ 87 ]. The sensing mechanism relies on measuring the wavelength shift caused by the covalent bonding between the GO and BSA.…”

Section: The Functionalization Of Lpfg-based Biosensorsmentioning

confidence: 99%

Long-Period Fiber Grating Sensors for Chemical and Biomedical Applications

Cai

Liu

Shu

2023

Sensors

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Optical fiber biosensors (OFBS) are being increasingly proposed due to their intrinsic advantages over conventional sensors, including their compactness, potential remote control and immunity to electromagnetic interference. This review systematically introduces the advances of OFBS based on long-period fiber gratings (LPFGs) for chemical and biomedical applications from the perspective of design and functionalization. The sensitivity of such a sensor can be enhanced by designing the device working at or near the dispersion turning point, or working around the mode transition, or their combination. In addition, several common functionalization methods are summarized in detail, such as the covalent immobilization of 3-aminopropyltriethoxysilane (APTES) silanization and graphene oxide (GO) functionalization, and the noncovalent immobilization of the layer-by-layer assembly method. Moreover, reflective LPFG-based sensors with different configurations have also been introduced. This work aims to provide a comprehensive understanding of LPFG-based biosensors and to suggest some future directions for exploration.

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Bovine Serum Albumin Detection by Graphene Oxide Coated Long-Period Fiber Grating

Cited by 15 publications

References 35 publications

Long-Period Fiber Grating Based on Side-Polished Optical Fiber and Its Sensing Application

Long-Period Fiber Grating Based on Side-Polished Optical Fiber and Its Sensing Application

Recent Advances in Fiber-Optic Sensors for the Detection of Inorganic Acidic Gases

Long-Period Fiber Grating Sensors for Chemical and Biomedical Applications

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