Cascaded distributed multichannel fiber SPR sensor based on gold film thickness adjustment approach

Zhang, Yu; Pan, Liang; Wang, Yushan; Liu, Zhihai; Wei, Yong; Zhu, Zongda; Zhao, Enming; Yang, Jun

doi:10.1016/j.sna.2017.09.038

Cited by 38 publications

(15 citation statements)

References 23 publications

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“…In an SPR-based fiber optic sensor, because all the guided rays are launched, the detector obtains the accumulation of all transmission modes corresponding to each angle. Figure 2 b shows normalized spectrums of the sensor in different RIs; the sensor shows a clear resonance which shifts towards the red wavelength range when the RI increases in the surrounding liquid, which is consistent with the reported SPR sensors based on Au coatings [ 17 ]. We changed the liquid RIs by using different sodium chloride solutions which were calibrated by an Abbe refractometer (WAY-2S).…”

Section: Methodssupporting

confidence: 86%

A Low-Cost and Portable Dual-Channel Fiber Optic Surface Plasmon Resonance System

Liu

Chen

et al. 2017

Sensors

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A miniaturization and integration dual-channel fiber optic surface plasmon resonance (SPR) system was proposed and demonstrated in this paper. We used a yellow light-emitting diode (LED, peak wavelength 595 nm) and built-in web camera as a light source and detector, respectively. Except for the detection channel, one of the sensors was used as a reference channel to compensate nonspecific binding and physical absorption. We packaged the LED and surface plasmon resonance (SPR) sensors together, which are flexible enough to be applied to mobile devices as a compact and portable system. Experimental results show that the normalized intensity shift and refractive index (RI) of the sample have a good linear relationship in the RI range from 1.328 to 1.348. We used this sensor to monitor the reversible, specific interaction between lectin concanavalin A (Con A) and glycoprotein ribonuclease B (RNase B), which demonstrate its capabilities of specific identification and biochemical samples concentration detection. This sensor system has potential applications in various fields, such as medical diagnosis, public health, food safety, and environment monitoring.

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Section: Methodssupporting

confidence: 86%

A Low-Cost and Portable Dual-Channel Fiber Optic Surface Plasmon Resonance System

Liu

Chen

et al. 2017

Sensors

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“…It is necessary to plate a 300 nm gold film as the reflected film on the inclined plane of the step-index multi-mode fiber with the same grinding angle. According to the research of Zhang et al (2017), the most suitable thickness of the sensing gold film is 50 nm. Besides, the sensing effects are also affected by metal nanoparticles.…”

Section: Design Of the Sensor Structure And Theoretical Modelingmentioning

confidence: 99%

Enhanced sensitivity of fiber SPR sensor by metal nanoparticle

Liu

Gao

et al. 2020

Self Cite

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Purpose This paper aims to clarify the relationship between the performance of the metal nanoparticles and the sensitivity of the fiber surface plasma resonance (SPR) sensor. It proposes modeling the sensing effects of a single-mode fiber SPR sensor with a cone angle structure decorated with metal nanoparticles. This study uses the metal nanoparticles to the realize enhanced sensitivity of refractive index sensing. Design/methodology/approach This paper opted for an exploratory study using a simulation approach of finite-difference time-domain (FDTD). Specifically, the effect of size, the material and the shape of the metal nanoparticle on sensing performance are investigated theoretically. Findings In conclusion, it is evident that the localized SPR (LSPR) effect weakens as the diameter of the gold nanosphere increases, the SPR effect enhances and the SPR sensitivity increases first and then decreases. The metal nanoparticle with the different materials and different shapes also have different LSPR and SPR sensitivity and wavelength length dynamic range. The investigation shows that, by changing parameters, the reflection spectra of the fiber SPR sensor exhibit an obvious transition from LSPR to SPR characteristics, and enhanced sensitivity of the refractive index is realized. Originality/value This paper fulfills an identified need to study how the sensitivity of the fiber SPR sensor can be enhanced by the metal nanoparticle. After the optimization of parameters, the sensitivity of 5,140 nm/RIU is achieved, which provides a new research direction for sensitivity enhancement of fiber SPR sensor.

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“…The sensitivities of the two channels are 1712 and 3038 nm RIU −1 , respectively. [80] Particularly worth mentioning is that when the two channels are working at the same time, the sensitivity and the moving range of each channel remain unchanged, which shows that the two sensing channels independently respond to the analytes to be measured.…”

Section: Changing the Thickness Of The Metal Layermentioning

confidence: 99%

Multichannel Fiber Optic SPR Sensors: Realization Methods, Application Status, and Future Prospects

Zhang

Han

Zhang

et al. 2022

Laser & Photonics Reviews

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Fiber optic sensors based on surface plasmon resonance (SPR) have demonstrated outstanding performance in biomedical, environmental monitoring, public safety, and other aspects, which provide powerful platforms for qualitative detection and quantitative analysis of molecular interactions. Among them, multichannel fiber optic SPR sensor has become a core tool in parallel detection scenarios due to the superiorities of compensating for nonspecific binding and environmental fluctuations and implementing multianalyte determination. The realization methods of multichannel sensing revolve around fiber microstructures, enhancement by materials, and hybrid fiber. The applications of multichannel fiber optic SPR sensors are demonstrated in sensing of liquid refractive index (RI), RI and temperature, biochemical molecules, and physical parameters. This review thoroughly analyzes and compares the structure, excitation effect, sensing performance, and the advantages and disadvantages of each type of multichannel fiber optic SPR sensor. Even though there are still some challenges, such as insufficient sensing channels and difficulty in fabrication, in their advancement, efforts in multidiscipline including developing high-performance sensitive films and innovating micro-nano fabrication processes will overcome these bottlenecks. Lastly, the future development directions of multichannel fiber optic SPR sensors from principle, structure, and material aspects are discussed.

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Cascaded distributed multichannel fiber SPR sensor based on gold film thickness adjustment approach

Cited by 38 publications

References 23 publications

A Low-Cost and Portable Dual-Channel Fiber Optic Surface Plasmon Resonance System

A Low-Cost and Portable Dual-Channel Fiber Optic Surface Plasmon Resonance System

Enhanced sensitivity of fiber SPR sensor by metal nanoparticle

Multichannel Fiber Optic SPR Sensors: Realization Methods, Application Status, and Future Prospects

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