Electrochemical Plasmonic Fiber-optic Sensors for Ultra-Sensitive Heavy Metal Detection

Si, Ying; Lao, Jiajie; Zhang, Xuejun; Liu, Yuke; Cai, Shunshuo; González-Vila, Álvaro; Li, Kaiwei; Huang, Yunyun; Yuan, Yong; Caucheteur, Christophe; Guo, Tuan

doi:10.1109/jlt.2019.2917329

Cited by 50 publications

(22 citation statements)

References 41 publications

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“…Surface plasmon resonance (SPR) is a coupling phenomenon of a transverse magnetic (TM) mode of an electromagnetic field of an incident wave and a collective oscillation of a free electron that is located at the boundary between the dielectric and metal [26]. ese phenomena have been used in many applications, particularly, for sensing purposes [27][28][29][30]. In order to excite surface plasmons, the phase matching condition needs to be satisfied.…”

Section: Methodsmentioning

confidence: 99%

The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application

Sathukarn

Boonruang

et al. 2020

International Journal of Optics

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Nowadays, the simplicity of both designing and fabrication process of a terahertz (THz) resonator-based sensing technique leads to its ongoing development. The consumable THz resonator needs to be easily integrated into an existing terahertz time domain spectroscopy (THz TDS) measurement system. It should also be able to be fabricated in a mass scale with a low production cost. In this work, a metal-coated surface plasmon resonance- (SPR-) based sensor is simulated and designed as a low-cost refractive index sensor utilizing rigorous coupled wave analysis (RCWA). To demonstrate our methodology, we design a gold-coated grating with a polydimethylsiloxane (PDMS) as a substrate, in order to perform quantitative analysis of gasoline-toluene mixture composition, which has a refraction index variation of 0.1 at THz frequency. The grating period is tuned such that its surface plasmon resonance (SPR) frequency matches with the peak frequency of the THz TDS system. Moreover, other grating parameters, i.e., a filling factor and a grating depth, are optimized to increase the sensor sensitivity and sharpen the resonance dip. High sensitivity up to 500 GHz/RIU with a refractive index resolution up to 0.01 is numerically revealed. The H-field of the designed grating is then evaluated to indicate a strong SPR excitation. The well-developed designed grating introduces a promising, low-cost, and easily fabricated THz refractive index sensor.

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Section: Methodsmentioning

confidence: 99%

The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application

Sathukarn

Boonruang

et al. 2020

International Journal of Optics

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“…Nowadays, high research interest in the detection and sorption of heavy metal ions has been observed, including the development of novel sensors [6,7] because at relatively low concentrations, heavy metals are dangerous for soil, plants, living organisms and human health [8,9]. That is why technologies aimed at limiting the mobility of heavy metals are increasingly used [10].…”

Section: Introductionmentioning

confidence: 99%

Testing of Natural Sorbents for the Assessment of Heavy Metal Ions’ Adsorption

et al. 2021

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Nowadays, the sorption-oriented approach is on the agenda in the remediation practices of lands contaminated with heavy metals. The current growing quantity of research accounts for different sorbets. However, there is still a lack of studies utilizing the economic criteria. Therefore, to ensure a wide application of opportunities, one of the necessary requirements is their economic efficiency in use. By utilizing these criteria, this manuscript researches the generally accepted natural sorbents for the assessment of heavy metal ions’ adsorption, such as peat, diatomite, vermiculite and their mixtures in different proportions and physical shapes. The methodological base of the study consists of the volumetric (titrimetric) method, X-ray fluorescence spectrometry and atomic absorption spectrometry. Experimental tests show a certain decline in the efficiency of heavy metal ions’ adsorption from aqueous salt solutes as follows: granular peat–diatomite > large-fraction vermiculite > medium-fraction vermiculite > non-granular peat–diatomite > diatomite.

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“…On the basis of the signal modulation method, optical fiber sensors can be classified as phase modulation type, intensity modulation type, wavelength modulation type, polarization modulation type, etc. (8)(9)(10)(11)(12)(13)(14) Among them, fiber Bragg grating sensors and Fabry-Perot optical fiber sensors, whose techniques are relatively mature, have been widely used in various fields such as industry, the military, and aerospace. However, these two types of sensor have technical limitations that restrict their further application.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Monitoring System Based on Optical Fiber Acoustic Emission Sensor and Its Application in Partial Discharge Diagnosis of Gas-insulated Switchgear

Hou¹,

Qin²,

Gao³

et al. 2021

Sensors and Materials

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Gas-insulated switchgear (GIS) is widely used in high-voltage power transmission systems. There has also been increasing demand for the real-time and online detection of faults in GIS equipment. In this study, a new type of optical fiber acoustic emission (AE) sensor based on the photoelastic effect and the polarization modulation method is proposed and fabricated. Partial discharge (PD)-induced AE signals of different defects were collected by this sensor and used for back-propagation artificial neural network (BP-ANN) training and recognition after data preprocessing and feature extraction. The results of the research show that a BP-ANN with selfadaptation and self-learning combined with the proposed sensor has good performance in the recognition and prediction of PD faults in GIS equipment, and the average accuracy of the test set reached 93.7%. The detection technology for weak AE signals and the fault identification method reported in this study can provide a reference for online monitoring of GIS and other equipment, which will have appreciable economic value and social significance.

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Electrochemical Plasmonic Fiber-optic Sensors for Ultra-Sensitive Heavy Metal Detection

Cited by 50 publications

References 41 publications

The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application

The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application

Testing of Natural Sorbents for the Assessment of Heavy Metal Ions’ Adsorption

Intelligent Monitoring System Based on Optical Fiber Acoustic Emission Sensor and Its Application in Partial Discharge Diagnosis of Gas-insulated Switchgear

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