High performance ethanol and acetone gas sensor based nanocrystalline MnCo2O4 using clad-modified fiber optic gas sensor

Vadivel, S.; Balaji, G.; Rathinavel, S.

doi:10.1016/j.optmat.2018.08.067

Cited by 38 publications

(9 citation statements)

References 31 publications

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“…A nanocrystalline MnCo 2 O 4 coated optical fiber was also described as a sensitive FOCS for ethanol and acetone. 115 However, it took almost 1 h for a single measurement. Nanosheets made of MgCo 2 O 4 was also found to be ethanol and acetone sensitive.…”

Section: Analytical Chemistrymentioning

confidence: 99%

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Fiber-Optic Chemical Sensors and Biosensors (2015–2019)

2019

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Section: Analytical Chemistrymentioning

confidence: 99%

“…Working at room temperature, the sensor can detect ethanol concentrations in the range of 0–500 ppm. A nanocrystalline MnCo 2 O 4 coated optical fiber was also described as a sensitive FOCS for ethanol and acetone . However, it took almost 1 h for a single measurement.…”

Section: Sensors For (Dissolved) Gases and Vaporsmentioning

confidence: 99%

Fiber-Optic Chemical Sensors and Biosensors (2015–2019)

2019

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“…Because isophthalic acid can generally coordinate with different metal species, a series of binary and ternary metal oxide (Ni–Co, Mn–Co, Mn–Ni, Zn–Mn, and Mn–Co–Ni oxides) particles with multishell structure were synthesized based on the self-template strategy. Similar to other methods like microemulsion synthesis, hydrothermal synthesis, , coprecipitation . and hard-templating synthesis, the composition of mixed metal oxides can also be well controlled via the self-template strategy.…”

Section: Introductionmentioning

confidence: 99%

General Synthesis of Mixed Semiconducting Metal Oxide Hollow Spheres with Tunable Compositions for Low-Temperature Chemiresistive Sensing

Wang

Zhou

Qin

et al. 2019

ACS Appl. Mater. Interfaces

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Metal oxide hollow spheres (MOHSs) with multicomponent metal elements exhibit intriguing properties due to the synergistic effects of different components. However, it remains a great challenge to develop a general method to synthesize multicomponent MOHSs due to the different hydrolysis and condensation rates of precursors for different metal oxides. Herein, we demonstrate a general strategy for the controllable synthesis of MOHSs with up to five metal elements by decomposition of metal-phenolic coordination polymers (MPCPs), which are prepared by chelation of tannic acid with various metal ions. After calcination to burn out the organic component and induce heterogeneous contraction of MPCPs, a series of MOHSs with multishell structure, high specific surface area (55–171 m2/g), and crystalline mesoporous framework are synthesized, including binary (Fe–Co, Ni–Zn, and Ni–Co oxides), ternary (Ni–Co–Mn and Ni–Co–Zn oxides), and quinary (Ni–Co–Fe–Cu–Zn oxides) MOHSs. The gas sensing nanodevices based on quinary MOHSs show much higher response (10.91) than those based on single component toward 50 ppm of ethanol at 80 °C with the response/recovery time of 85/160 s. The quinary oxides sensor also displays high selectivity toward ethanol against other interfering gases (e.g., methanol, formadehyde, toluene, methane, and hydrogen) and long-term stability (∼94.0% after 4 weeks), which are extremely favorable for practical applications.

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“…This configuration offers a very attractive platform for sensing due to the miniaturisation of the sensor, the capability of remote sensing and high-temperature operation, biocompatibility, online sensing, and immunity from electromagnetic interference [3][4][5]. This kind of sensor is also of academic interest, and many novel and great ideas are continuously being developed [6][7][8][9][10][11][12]. Due to the passive nature of optical fibre sensors (i.e.…”

mentioning

confidence: 99%

Performance analysis of transmissive modified cladding optical fibre sensors

Jahromi

2021

IET Optoelectronics

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Optical fibre sensors with modified cladding have been a topic of great interest for decades. Thanks to the new techniques of fabricating nanostructured films, this interest has been renewed. Although there have been many increases in published experimental research, no comprehensive theoretical formulation of the structure is reported in the literature. In this study, a general theory for transmissive modified cladding optical fibre sensors is presented. The model is formulated based on the electromagnetic fields and optical power in the core and cladding of a step-index fibre. The model considers various parameters, especially the radius of the optical fibre core, modified cladding refractive index, and light wavelength. The sensitivity, response, and optical transmission of the sensor are analysed as a function of the parameters. The analyses show that optical transmission reduces dramatically when the modified cladding refractive index approaches the refractive index of the core of the fibre and results in higher sensor response and sensitivity. Increasing the core radius of the fibre will result in lower sensor response with higher sensitivity. Both parameters will increase for a light with a larger wavelength. The results are in good agreement with experimental evidence.

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High performance ethanol and acetone gas sensor based nanocrystalline MnCo2O4 using clad-modified fiber optic gas sensor

Cited by 38 publications

References 31 publications

Fiber-Optic Chemical Sensors and Biosensors (2015–2019)

Fiber-Optic Chemical Sensors and Biosensors (2015–2019)

General Synthesis of Mixed Semiconducting Metal Oxide Hollow Spheres with Tunable Compositions for Low-Temperature Chemiresistive Sensing

Performance analysis of transmissive modified cladding optical fibre sensors

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