Hybrid Diamond-Glass Optical Fibres for Magnetic Sensing

Bai, Dongbi; Capelli, Marco; Huynh, Hoa; Ebendorff‐Heidepriem, Heike; Foster, Scott; Greentree, Andrew D.

doi:10.1364/ofs.2018.wd3

Cited by 6 publications

(6 citation statements)

References 18 publications

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“…The collected fluorescence signal was detected by avalanche photodiodes (SPCM-AQRH-14) for imaging and temperature sensing. The spectral analysis was implemented through a commercial spectrometer (Princeton Instruments, SpectraPro with a PIXIS CCD camera). MW radiation for spin manipulation was generated using a MW generator (Rohde & Schwarz) and amplifier and sent to an omega-shape resonator. A Peltier stage was used to induce temperature changes in the hybrid membrane within the window of 20–50 °C.…”

Section: Methodsmentioning

confidence: 99%

Electrospun Nanodiamond–Silk Fibroin Membranes: A Multifunctional Platform for Biosensing and Wound-Healing Applications

Khalid

Bai

Abraham

et al. 2020

ACS Appl. Mater. Interfaces

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Next generation wound care technology capable of diagnosing wound parameters, promoting healthy cell growth and reducing pathogenic infections noninvasively would provide patients with an improved standard of care and an accelerated wound repair mechanism. Temperature is one of the indicating biomarkers specific to chronic wounds. This work reports a hybrid, multifunctional optical material platform -nanodiamond-silk membranes as bioinspired dressings capable of temperature sensing and wound healing. The hybrid structure was fabricated through electrospinning and formed 3D sub-micron fibrous membranes with high porosity. The silk fibres are capable of compensating for the lack of extracellular matrix at the wound site, supporting the wound healing process. The negatively charged nitrogen vacancy (NV -) color centres in nanodiamonds (NDs) exhibit optically detected magnetic resonance (ODMR) properties and act as fluorescent nanoscale thermometers, capable of sensing temperature variations associated to the presence of infection or inflammation in a wound, without physically removing the dressing. Our results show that the presence of NDs in the hybrid ND-silk membranes improve the thermal stability of silk fibres. The NVcolor centres in NDs embedded in silk fibres exhibit well-retained fluorescent and ODMR properties. Using the NVcentres as fluorescent nanoscale thermometers, we achieved temperature sensing at a range of temperatures, including the biologically relevant temperature window, on cellcultured ND-silk membranes. An enhancement in the temperature sensitivity of the NVcentres was observed for the hybrid materials. The hybrid membranes were further tested in vivo in a murine wound healing model and demonstrated biocompatibility and equivalent wound closure rates as the control wounds. Additionally, the hybrid ND-silk membranes showed selective antifouling and biocidal propensity toward Gram-negative Pseudomonas aeruginosa and Escherichia coli, while no effect was observed on Gram-positive Staphylococcus aureus.

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Section: Methodsmentioning

confidence: 99%

Electrospun Nanodiamond–Silk Fibroin Membranes: A Multifunctional Platform for Biosensing and Wound-Healing Applications

Khalid

Bai

Abraham

et al. 2020

ACS Appl. Mater. Interfaces

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“…The presented sensor demonstrated an inherently magnetic field sensitivity of 10 T/Hz 1/2 . Bai et al [186] recently published a novel NDdoped lead silicate glass fiber that not only yielded an improved magnetic field sensitivity of 350 nT/Hz 1/2 , but also introduce a new avenue of coupling fluorescence emission from ND to guided modes of conventional step-index optical fiber. intensity versus magnetic field [182].…”

Section: Other Physical Parameter Sensing Applicationsmentioning

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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“…The presented sensor demonstrated an inherently magnetic field sensitivity of 10 μT/Hz 1/2 . Bai et al [186] recently published a novel ND-doped lead silicate glass fiber that not only yielded an improved magnetic field sensitivity of 350 nT/Hz 1/2 , but also introduce a new avenue of coupling fluorescence emission from ND to guided modes of conventional step-index optical fiber.…”

Section: Other Physical Parameter Sensing Applicationsmentioning

confidence: 99%

Fiber Optic Sensors and Applications

Asokan¹

2020

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Hybrid Diamond-Glass Optical Fibres for Magnetic Sensing

Cited by 6 publications

References 18 publications

Electrospun Nanodiamond–Silk Fibroin Membranes: A Multifunctional Platform for Biosensing and Wound-Healing Applications

Electrospun Nanodiamond–Silk Fibroin Membranes: A Multifunctional Platform for Biosensing and Wound-Healing Applications

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

Fiber Optic Sensors and Applications

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