Smart hydrogel-based optical fiber SPR sensor for pH measurements

Zhao, Yong; Lei, Ming; Liu, Shi-Xuan; Zhao, Qiang

doi:10.1016/j.snb.2018.01.120

Cited by 155 publications

(80 citation statements)

References 21 publications

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“…The surface plasmon resonance (SPR) phenomenon has been widely studied and applied in medical diagnostics, environmental monitoring, and biochemical research due to its high sensitivity, real-time and label-free monitoring [1][2][3][4][5][6]. Most commercial SPR sensors are based on a prism structure.…”

Section: Introductionmentioning

confidence: 99%

“…Using optical fiber-based SPR instead of a bulky prism can improve the integration degree. In these fiber-based designs, the fiber jacket is physically or chemically removed to expose the core to the sensing region in order to enhance the coupling between the core mode and the surface plasmon polariton (SPP) modes [1][2][3][4][5][6]. The laborious process will make the sensor more fragile.…”

Section: Introductionmentioning

confidence: 99%

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A Large Detection-Range Plasmonic Sensor Based on An H-Shaped Photonic Crystal Fiber

Han

Hou

Zhao

et al. 2020

Sensors

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An H-shaped photonic crystal fiber (PCF)-based surface plasmon resonance (SPR) sensor is proposed for detecting large refractive index (RI) range which can either be higher or lower than the RI of the fiber material used. The grooves of the H-shaped PCF as the sensing channels are coated with gold film and then brought into direct contact with the analyte, which not only reduces the complexity of the fabrication but also provides reusable capacity compared with other designs. The sensing performance of the proposed sensor is investigated by using the finite element method. Numerical results show that the sensor can work normally in the large analyte RI (n a ) range from 1.33 to 1.49, and reach the maximum sensitivity of 25,900 nm/RIU (RI units) at the n a range 1.47-1.48. Moreover, the sensor shows good stability in the tolerances of ±10% of the gold-film thickness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Large Detection-Range Plasmonic Sensor Based on An H-Shaped Photonic Crystal Fiber

Han

Hou

Zhao

et al. 2020

Sensors

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“…Surface plasmon resonance (SPR) is considered one of the most promising sensing technologies in environmental protection [1,2], chemical reaction monitiring [3], biomedical sensing [4] and other photonic devices [5,6] due to its advantages being of label-free, accurate and of high sensitivity. SPR occurs when an evanescent wave matches free electrons on a metal surface.…”

Section: Introductionmentioning

confidence: 99%

A Refractive Index Sensor Based on H-Shaped Photonic Crystal Fibers Coated with Ag-Graphene Layers

Zhu

Yang

et al. 2020

Sensors

111

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An Ag-graphene layers-coated H-shaped photonic crystal fiber (PCF) surface plasmon resonance (SPR) sensor with a U-shaped grooves open structure for refractive index (RI) sensing is proposed and numerically simulated by the finite element method (FEM). The designed sensor could solve the problems of air-holes material coating and analyte filling in PCF. Two big air-holes in the x-axis produce a birefringence phenomenon leading to the confinement loss and sensitivity of x-polarized light being much stronger than y-polarized. Graphene is deposited on the layer of silver in the grooves; its high surface to volume ratio and rich π conjugation make it a suitable dielectric layer for sensing. The effect of structure parameters such as air-holes size, U-shaped grooves depth, thickness of the silver layer and number of graphene layers on the sensing performance of the proposed sensor are numerical simulated. A large analyte RI range from 1.33 to 1.41 is calculated and the highest wavelength sensitivity is 12,600 nm/RIU. In the linear RI sensing region of 1.33 to 1.36; the average wavelength sensitivity we obtained can reach 2770 nm/RIU with a resolution of 3.61 × 10−5 RIU. This work provides a reference for developing a high-sensitivity; multi-parameter measurement sensor potentially useful for water pollution monitoring and biosensing in the future.

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“…There has recently been an essential need to develop new kinds of sensors [26]. Molecular imprinting technology which is an emerging technique has been used in sensing area [27][28][29][30][31][32][33]. This technology is an approach to create a polymer matrix containing molecular recognition sites which are characteristic in shape/functional groups of target molecule [34].…”

Section: Introductionmentioning

confidence: 99%

Molecularly imprinted biomimetic surface plasmon resonance sensor for hormone detection

Türkoğlu¹,

Bakhshpour²,

Deni̇zli̇³

2019

Biointerface Res Appl Chem

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In this study, 17β-estradiol (E2) was performed by surface plasmon resonance (SPR) based on molecularly imprinted technique. In the first, SPR sensor was prepared by the formation of E2 imprinted poly(2-hydroxyetyl methacrylate) / (N-methacryloyl-(L)- leucine methyl esters) (PHEMALM) on the modified gold surface of SPR chip. Also, non-imprinted SPR chip was prepared by the same method at the E2 imprinted PHEMALM (E2-MIPHEMALM-SPR) chip without E2. E2-MIPHEMALM-SPR and non-imprinted (NIPHEMALM-SPR) chips were characterized with Fourier transform infrared spectrophotometry (FTIR), ellipsometry, atomic force microscopy (AFM) and contact angle measurements. After that, SPR chips were completed to SPR system to investigate kinetic properties for E2. The sensing ability of E2-MIPHEMALM-SPR chip was investigated with 20-10000 ng/mL concentrations of 17βestradiol solutions. The E2-MIPHEMALM-SPR chip was showed more selectivity for 17β-estradiol than NIPHEMALM-SPR chip. To show the selectivity of E2-MIPHEMALM-SPR chip competitive adsorption of 17β-estradiol, cholesterol and stigmasterol were investigated. E2-MIPHEMALM-SPR chip was investigated ten times with same concentrations of 17β-estradiol solution to show reuse of the chip. The results showed that the E2-MIPHEMALM-SPR chip has high selectivity for 17β-estradiol.

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Smart hydrogel-based optical fiber SPR sensor for pH measurements

Cited by 155 publications

References 21 publications

A Large Detection-Range Plasmonic Sensor Based on An H-Shaped Photonic Crystal Fiber

A Large Detection-Range Plasmonic Sensor Based on An H-Shaped Photonic Crystal Fiber

A Refractive Index Sensor Based on H-Shaped Photonic Crystal Fibers Coated with Ag-Graphene Layers

Molecularly imprinted biomimetic surface plasmon resonance sensor for hormone detection

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