Carbon Nanotubes and Graphene Oxide Applications in Optochemical Sensors

Khalaf, Ahmed Lateef; Shabaneh, A. A.; Yaacob, Mohd Hanif

doi:10.1016/b978-0-12-815757-2.00010-3

Cited by 3 publications

(2 citation statements)

References 59 publications

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“…Azad et al [132], by coating tapered optical fibers with ZnO nanorods, shortened the sensor response time to 0.6 s and increased linearity to 97%, as shown in Figure 24. Similarly, Khalaf et al [133] coated tapered optical fibers with carbon nanotubes and GO films, simplifying sensor implementation and ensuring sensitivity. Simultaneously, the sensors exhibited excellent selectivity for ethanol across various organic compounds.…”

Section: Detection Of Ethanol Concentration In Watermentioning

confidence: 99%

The Structure and Applications of Fused Tapered Fiber Optic Sensing: A Review

Ban,

Lian

2024

Photonics

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Tapered optical fibers have continuously evolved in areas such as distributed sensing and laser generation in recent years. Their high sensitivity, ease of integration, and real-time monitoring capabilities have positioned them as a focal point in optical fiber sensing. This paper systematically introduces the structures and characteristics of various tapered optical fiber sensors, providing a comprehensive overview of their applications in biosensing, environmental monitoring, and industrial surveillance. Furthermore, it offers insights into the developmental trends of tapered optical fiber sensing, providing valuable references for future related research and suggesting potential directions for the further advancement of optical fiber sensing.

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Section: Detection Of Ethanol Concentration In Watermentioning

confidence: 99%

The Structure and Applications of Fused Tapered Fiber Optic Sensing: A Review

Ban,

Lian

2024

Photonics

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“…The response and recovery time of the sensor was measured as 50 and 53 s, respectively. In summary, Table 6 collates information on all carbon nanomaterial-based optical fiber ethanol sensors and their respective sensing performance [197].…”

Section: Alcoholmentioning

confidence: 99%

Carbon Allotrope-Based Optical Fibers for Environmental and Biological Sensing: A Review

Yap

Chan

Tjin

et al. 2020

Sensors

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Recently, carbon allotropes have received tremendous research interest and paved a new avenue for optical fiber sensing technology. Carbon allotropes exhibit unique sensing properties such as large surface to volume ratios, biocompatibility, and they can serve as molecule enrichers. Meanwhile, optical fibers possess a high degree of surface modification versatility that enables the incorporation of carbon allotropes as the functional coating for a wide range of detection tasks. Moreover, the combination of carbon allotropes and optical fibers also yields high sensitivity and specificity to monitor target molecules in the vicinity of the nanocoating surface. In this review, the development of carbon allotropes-based optical fiber sensors is studied. The first section provides an overview of four different types of carbon allotropes, including carbon nanotubes, carbon dots, graphene, and nanodiamonds. The second section discusses the synthesis approaches used to prepare these carbon allotropes, followed by some deposition techniques to functionalize the surface of the optical fiber, and the associated sensing mechanisms. Numerous applications that have benefitted from carbon allotrope-based optical fiber sensors such as temperature, strain, volatile organic compounds and biosensing applications are reviewed and summarized. Finally, a concluding section highlighting the technological deficiencies, challenges, and suggestions to overcome them is presented.2 of 43 of target molecules or physical parameters. In some instances, surface-modified carbon allotropes also permit multi-parameter detection capabilities of carbon allotrope-based OFS [7]. As such, an insight into the recent advances of carbon allotrope-based OFS can serve as a guideline to develop an effective detection approach for emerging real-world applications. Many review articles on carbon allotrope-based OFS mainly focus on a single type of carbon allotrope and the fundamental theory of carbon allotrope-based OFS [8,9]. Thus, this comprehensive review article encompasses the properties, preparation, sensing mechanisms, nanocoating deposition techniques, physical and biochemical sensing applications. This review aims to highlight the recent research work on carbon allotrope-based OFS that will serve as a reference guide for researchers to develop optimal detection approaches for physical parameters or trace level monitoring of chemical and biomolecules. Four groups of carbon allotropes, including carbon nanotubes (CNT), carbon dots (CDs), graphene, and nanodiamonds (NDs), will be studied. Commonly adopted synthesis approaches, classification of various deposition techniques for the integration of carbon allotropes as the thin film coating of OFS as well as numerous examples of these carbon allotrope-based OFS will also be outlined.

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