Room temperature ammonia sensing using tapered multimode fiber coated with polyaniline nanofibers

Ibrahim, Siti Azlida; Rahman, Norizah Abdul; Bakar, M. H. Abu; Girei, Saad Hayatu; Yaacob, Mohd Hanif; Ahmad, Harith; Mahdi, Mohd Adzir

doi:10.1364/oe.23.002837

Cited by 49 publications

(23 citation statements)

References 25 publications

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“…Natural NH 3 level present in the atmosphere is in low ppb (1-5 ppb) levels. NH 3 can be characterized by its colorless, pungent smell, and explosive, toxic at a high-concentration NH 3 atmosphere [20,21]. Generally, upon exposure to around 50 ppm NH 3 gas in air Modified Single Mode Optical Fiber Ammonia Sensors Deploying PANI Thin Films DOI: http://dx.doi.org/10.5772/intechopen.94001 may cause acute poisoning or life-threatening situations such as permanent blindness, lung disease, respiratory disease, skin disease.…”

Section: Etched-tapered Optical Fiber Sensorsmentioning

confidence: 99%

Modified Single Mode Optical Fiber Ammonia Sensors Deploying PANI Thin Films

Mohammed¹,

Yaacob²

2021

Application of Optical Fiber in Engineering

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Modified optical fiber sensors received increasing attention because of their superior properties over electrical sensors. These properties include their immunity towards electromagnetic interference and the ability to be deployed in corrosive and volatile environment. Several optical fiber platforms have been developed for chemical sensing applications based on modifying optical fiber cladding layer such as etched, tapered, D-shaped and etched-tapered. The modifications purpose is to extend the evanescent wave propagating out of the core physical dimensions. Thus, evanescent wave interaction with analyte is enhanced. Modified optical transducing platforms are integrated in gas sensing applications, such as ammonia. Modified optical fiber sensors coated with nanostructured thin films have been developed and gained popularity as practical devices towards gases with low concentrations. The development and characterization of the modified SMF sensing platforms including etched, tapered and etched-tapered platforms against ammonia will be presented in this chapter. These platforms were coated with PANI nanostructured thin film. The 50 μm etched-tapered SMF coated with PANI produced response, recovery times, and sensitivity of 58 s, 475 s, and 231.5%, respectively, in the C-band range. The limit of detection of the modified fiber sensor was 25 ppm. The developed sensors exhibit good repeatability, reversibility, and selectivity.

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Section: Etched-tapered Optical Fiber Sensorsmentioning

confidence: 99%

Modified Single Mode Optical Fiber Ammonia Sensors Deploying PANI Thin Films

Mohammed¹,

Yaacob²

2021

Application of Optical Fiber in Engineering

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“…One of the most important thing to obtain a good sensitivity sensor performance is the use of material coating such as ZnO [17], PANI [18], Cerium oxide [19], and ITO [20].…”

Section: Introductionmentioning

confidence: 99%

Optical Sensing Performance of Multimode Polymer Optical Fiber (POF) Coated with ZnO towards Methanol Vapour

Mulyanti

Pantjawati

Hasanah

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this work, optical sensing performance of multimode polymer optical fiber coated with ZnO towards methanol vapour with different concentrations is studied. The etching process of the POF was carried out using chemical etching method. ZnO was synthesized with sol-gel method to obtain the sensitive material coating. The etched optical fiber was then dipcoated with ZnO and dried at 70oC to enhance the binding of the materials and to remove organic residue. Scanning Electron Microscope (SEM), and X-Ray poer Difraction (XRD) analyses were performed to characterize the ZnO layer. The measurements of optical performance were taken using a spectrophotometer in the optical wavelength in the range of 500-8000nm. The absorbance response of the ZnO coated etched fiber reduced proportionally, upon exposure to methanol vapour with concentration in the range of 5%-50%.

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“…During the past decade, a number of ammonia sensors based on different operating principles were proposed, such as electro-chemical sensors [3], metal oxide semiconductor sensors [4], ratiometric fluorescence sensors [5]. Recently, the development of fiber optic sensors for the detection of ammonia has increased rapidly [6][7][8] due to the significant advantages of optical fiber sensors such as a very compact size, immunity to electromagnetic interference, remote sensing capabilities, and most importantly, their ability to operate at room temperature.…”

Section: Introductionmentioning

confidence: 99%