CO2 sensing at room temperature using carbon nanotubes coated core fiber Bragg grating

Shivananju, Bannur Nanjunda; Yamdagni, Sumeet; Fazuldeen, R.; Kumar, A. K. Sarin; Hegde, G. M.; Varma, Manoj M.; Asokan, S.

doi:10.1063/1.4810016

Cited by 63 publications

(29 citation statements)

References 30 publications

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“…The functional material also imparts selectivity to the sensor if it reacts only to the target analyte. One of the key contributions of this work is to demonstrate that the polymer Polyhexamethylene Biguanide (PHMB) functions effectively as a refractometric sensing layer for CO 2 gas without requiring the addition of water vapor, as is the case for previously reported functional materials [8,9]. PHMB belongs to a class of guanidine derivatives which have been known to function in both solution and solid states to reversibly bind with CO 2 gas molecules.…”

Section: Microring Refractometric Co 2 Gas Sensormentioning

confidence: 99%

“…However, while several refractometric CO 2 sensors using different functionalization materials have been reported, they typically require a humidified gas environment to operate. For example, a fiber Bragg grating sensor was reported in [8] which employs polyallylamine-amino-carbon nanotubes for detecting CO 2 at fairly large concentrations, in the 1000 -4000 ppm range, under a constant relative humidity of 47%. A surface plasmon resonance sensor functionalized with a polymer blend was also reported in [9] for detecting dissolved and humidified gaseous CO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Silicon microring refractometric sensor for atmospheric CO_2 gas monitoring

Mi¹,

Horvath²,

Aktary³

et al. 2016

Opt. Express

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We report a silicon photonic refractometric CO(2) gas sensor operating at room temperature and capable of detecting CO(2) gas at atmospheric concentrations. The sensor uses a novel functional material layer based on a guanidine polymer derivative, which is shown to exhibit reversible refractive index change upon absorption and release of CO(2) gas molecules, and does not require the presence of humidity to operate. By functionalizing a silicon microring resonator with a thin layer of the polymer, we could detect CO(2) gas concentrations in the 0-500ppm range with a sensitivity of 6 × 10(-9) RIU/ppm and a detection limit of 20ppm. The microring transducer provides a potential integrated solution in the development of low-cost and compact CO(2) sensors that can be deployed as part of a sensor network for accurate environmental monitoring of greenhouse gases.

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Section: Microring Refractometric Co 2 Gas Sensormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silicon microring refractometric sensor for atmospheric CO_2 gas monitoring

Mi¹,

Horvath²,

Aktary³

et al. 2016

Opt. Express

View full text Add to dashboard Cite

show abstract

“…The maximum photosensitivity of graphene‐FBG device was found to be 95 pm mW −1 with the limit of detection (LoD) of 210 µW (LoD = resolution of the OSA (20 pm)/sensitivity (95 pm mW −1 )). The LoD can be further reduced to nW by using high resolution interrogator system, using micro or etched FBG devices and by increasing the absorption of graphene by constructing heterostructures with other 2D materials.…”

Section: Resultsmentioning

confidence: 99%

Graphene Heterostructure Integrated Optical Fiber Bragg Grating for Light Motion Tracking and Ultrabroadband Photodetection from 400 nm to 10.768 µm

Shivananju

Bao

Yu³

et al. 2019

Adv Funct Materials

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Integrated photonics and optoelectronics devices based on graphene and related 2D materials are at the core of the future industrial revolution, facilitating compact and flexible nanophotonic devices. Tracking and detecting the motion of broadband light in millimeter to nanometer scale is an unfold science which has not been fully explored. In this work, tracking and detecting the motion of light (millimeter precision) is first demonstrated by integrating graphene with an optical fiber Bragg grating device (graphene-FBG). When the incident light moves toward and away from the graphene-FBG device, the Bragg wavelength red-shifts and blue-shifts, indicating its light motion tracking ability. Such light tracking capability can be further extended to an ultrabroad wavelength range as all-optical photodetectors show the robust response from 400 nm to 10.768 µm with a linear optical response. Interestingly, it is found that graphene-Bi 2 Te 3 heterostructure on FBG shows 87% higher photoresponse than graphene-FBG at both visible and telecom wavelengths, due to stronger phonon-electron coupling and photo-thermal conversion in the heterostructure. The device also shows superior stability even after 100 d. This work may open up amazing integrated nanophotonics applications such as astrophysics, optical communication, optical computing, optical logic gating, spectroscopy, and laser biology.

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“…One recent method to increase the mechanical properties of adhesives is through the addition of carbonnanotubes (CNTs). Previous authors have demonstrated CNT coatings on optical fibers, to create nonlinear optical interactions, however not at sufficient densities to significantly change their mechanical properties [10][11][12][13][14][15][16]. Typically, adding CNTs to bulk polymers or coatings results in a maximum performance gain at around a few percent weight addition [17,18].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Lamb wave measurement sensitivity of aligned carbon nanotube coated fiber Bragg grating

et al. 2019

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Fiber Bragg grating (FBG) sensors are typically bonded on the surface of a structure using an adhesive to collect ultrasonic waves for damage detection in structural health monitoring applications. However, the ultrasonic wave transfer from structure to optical fiber suffers signal attenuation due to the adhesive bond layer, which has a significantly different acoustic impedance than the optical fiber. Therefore, this paper develops a systematic procedure to fabricate an aligned carbon nanotube (CNT)-wrapped FBGs for acoustic impedance matching. Specifically, we first develop an automated CNT winding system to fabricate CNT-wrapped FBGs with varying CNT layer thickness, which are bonded to an aluminum plate for ultrasonic sensitivity testing. We demonstrate that CNT wrapped FBGs do not necessarily produce an increased sensitivity as compared to a reference polyimide-coated FBG, however some outliers are observed with a significant improvement. Using a scanning electron microscopy we examine the cross-section of CNT/adhesive layers, identifying a unique CNT/ adhesive bonding morphology with a stiff exterior shell and a relatively compliant inner layer. Finite element simulation validates that this two-layered bonding geometry is most likely the source of the increased FBG ultrasonic sensitivity for the outliers.

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CO2 sensing at room temperature using carbon nanotubes coated core fiber Bragg grating

Cited by 63 publications

References 30 publications

Silicon microring refractometric sensor for atmospheric CO_2 gas monitoring

Silicon microring refractometric sensor for atmospheric CO_2 gas monitoring

Graphene Heterostructure Integrated Optical Fiber Bragg Grating for Light Motion Tracking and Ultrabroadband Photodetection from 400 nm to 10.768 µm

Ultrasonic Lamb wave measurement sensitivity of aligned carbon nanotube coated fiber Bragg grating

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