Dual Fabry–Pérot Interferometric Carbon Monoxide Sensor Based on the PANI/Co<sub>3</sub>O<sub>4</sub> Sensitive Membrane-Coated Fibre Tip

Peng, Jinlong; Feng, Wenlin; Yang, Xiaozhan; Huang, Guojia; Liu, Shaodian

doi:10.1515/zna-2018-0453

Cited by 19 publications

(6 citation statements)

References 40 publications

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“…The thickness of the film h and its material are selected based on the type of gas under test. For instance, PEI/PVA coating is used for CO2 concentration measurement [46]; polyaniline/Co3O4 -for CO [47]; LuBc2 -for NO2; PDMS/PMMA -for NH3 [48]; Сryptophane A -for СН4 and others. Humidity measurement can be performed using PVA coating [49].…”

Section: Environmental Monitoringmentioning

confidence: 99%

Addressed Fiber Bragg Structures: Principles and Applications Overview

Agliullin¹,

Il'In²,

Kuznetsov³

et al. 2022

Preprint

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Five years ago, the concept of addressed fiber Bragg structures (AFBS) was proposed, which simultaneously perform the functions of a two-frequency radiation shaper, the difference frequency of which is the AFBS address, and a sensitive element, since the value of the difference frequency is invariant to measured physical fields, and the set of difference frequencies, moreover, is orthogonal in the array of such sensors, enabling their address multiplexing. In this article, we provide an overview of the theory and technology of AFBS, including the structures with three or more spectral components with various combinations of difference frequencies, symmetrical and asymmetric, performing the functions of the address and converting information signals to the low-frequency range at the same time, along with other functions. The subjects of interrogation of these structures, their fabrication and calibration are discussed as well. We also consider a wide range of applications in which AFBS can be used, covering such areas as oil and gas production, power engineering, transport, medicine, etc. In addition, the prospects of AFBS further development are proposed.

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Section: Environmental Monitoringmentioning

confidence: 99%

Addressed Fiber Bragg Structures: Principles and Applications Overview

Agliullin¹,

Il'In²,

Kuznetsov³

et al. 2022

Preprint

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“…First, FPR is formed at the fiber end face, then a femtosecond laser is focused through a glass capillary into the core of the fiber for AFBS forming. To measure the greenhouse gas concentration, the FPR gas-sensitive layer is formed from different polymers: PEI/PVA -for CO2 [29]; polyaniline/Co3O4 -for CO [30]; LuBc2for NO2; PDMS/PMMA -for NH3 [31]; Сryptophane A -for СН4; Cellulose -for ОХ. Humidity measurement can be performed using PVA coating [32].…”

Section: Acfos Modelmentioning

confidence: 99%

Addressed Combined Fiber-Optic Sensors as Key Element of Multi-Sensor Greenhouse Gas Monitoring Systems

Morozov¹,

Tunakova²,

Hussein³

et al. 2022

Preprint

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The design and usage of the addressed combined fiber-optic sensors (ACFOS) and the multisensory control systems of the greenhouse gas concentration on their basis are investigated. The main development trend of the combined fiber-optic sensors (CFOS), consisting of the fiber Bragg grating (FBG) and the Fabry-Perot resonator (FPR), which are successively formed at the optical fiber end, is highlighted. The addressed fiber Bragg structures (AFBS) usage instead of the FBG in the CFOS leads not only to significant cheapening of the sensor system due to microwave photonics interrogating methods, but also to increasing its metrological characteristics. The structural scheme of the multisensory gas concentration monitoring system is suggested. The suggested scheme allows detecting four types of the greenhouse gases (СО2, NO2, CH4, OX) depending on the material and thickness of the polymer film, which is the FPR sensitive element. The usage of Karunen-Loeff transform (KLT), which allows separating each component contribution to the reflected spectrum according to its efficiency, is proposed. In the future, it allows determining the gas concentration at the AFBS address frequencies. The estimations have shown that the ACFOS design in the multisensory system allows measuring the environment temperature in the range of −60…+300 °C with an accuracy of 0.1–0.01 °C, and the gas concentration in the range of 10…90% with the accuracy of 0.1–0.5%.

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“…Density Functional Theory (DFT) was employed using Vienna Ab initio Simulation Package (VASP) 49,50 to obtain the adsorption energies of oxygen and nitrogen molecules on two transition metal oxides: a- [51][52][53][54] This work explores their application as membranes solely via adsorption (the parameters used in the calculations are listed in Section 2 of the ESI †). Oxygen and nitrogen molecules were placed in various initial congurations and the adsorption energy (E ads ) was calculated by using eqn (6).…”

Section: Density Functional Theorymentioning

confidence: 99%