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Sensors (Basel)

Title:		Carbon Allotrope-Based Optical Fibers for Environmental and Biological Sensing: A Review
Author(s):		Yap SHK; Chan KK; Tjin SC; Yong KT;
Address:		"School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore"
Journal Title:		Sensors (Basel)
Year:		2020
Volume:		20200405
Issue:		7
Page Number:		-
DOI:		10.3390/s20072046
ISSN/ISBN:		1424-8220 (Electronic) 1424-8220 (Linking)
Abstract:		"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"
Keywords:		"*Biosensing Techniques Graphite/chemistry Humans Nanodiamonds/*chemistry Nanostructures/chemistry Nanotubes, Carbon/*chemistry *Optical Fibers Volatile Organic Compounds/chemistry/isolation & purification carbon dots carbon nanotubes graphene nanocoating;"
Notes:		"MedlineYap, Stephanie Hui Kit Chan, Kok Ken Tjin, Swee Chuan Yong, Ken-Tye eng Review Switzerland 2020/04/09 Sensors (Basel). 2020 Apr 5; 20(7):2046. doi: 10.3390/s20072046"