Thinned fibre Bragg grating as a fuel adulteration sensor: simulation and experimental study

Agarwal, Sajal; Prajapati, Yogendra Kumar; Mishra, Vivekanand

doi:10.1515/oere-2015-0037

Cited by 19 publications

(8 citation statements)

References 19 publications

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“…Refractive index is a fundamental quantity, intrinsic to the physical and chemical properties of a substance. Measurements of refractive indices are widely used in the pharmaceutical industry, 1 environmental monitoring, 2 adulteration detection, [3][4][5] and biosensing. [6][7][8][9][10] Several technologies for refractive index measurement have been previously described in the literature, and with the push for further miniaturization, many microfluidic technologies have emerged.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric nanofluidic grating detector for differential refractive index measurement and biosensing

et al. 2017

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Measuring small changes in refractive index can provide both sensitive and contactless information on molecule concentration or process conditions for a wide range of applications. However, refractive index measurements are easily perturbed by non-specific background signals, such as temperature changes or non-specific binding. Here, we present an optofluidic device for measuring refractive index with direct background subtraction within a single measurement. The device is comprised of two interdigitated arrays of nanofluidic channels designed to form an optical grating. Optical path differences between the two sets of channels can be measured directly via an intensity ratio within the diffraction pattern that forms when the grating is illuminated by a collimated laser beam. Our results show that no calibration or biasing is required if the unit cell of the grating is designed with an appropriate built-in asymmetry. In proof-of-concept experiments we attained a noise level equivalent to ∼10 refractive index units (30 Hz sampling rate, 4 min measurement interval). Furthermore, we show that the accumulation of biomolecules on the surface of the nanochannels can be measured in real-time. Because of its simplicity and robustness, we expect that this inherently differential measurement concept will find many applications in ultra-low volume analytical systems, biosensors, and portable devices.

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Section: Introductionmentioning

confidence: 99%

Asymmetric nanofluidic grating detector for differential refractive index measurement and biosensing

et al. 2017

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“…Different types of VOC analyzers are used in monitoring of air quality [4], detection of food adulteration [5], detection of fuel adulteration [6], detection of explosives [7], discrimination of microbial species [8], and diagnosis of plants [9] and human diseases [10,11]. The gold standard technique for VOC detection is gas chromatography coupled with mass spectrometry (GC-MS).…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid-Based Quartz Crystal Microbalance Sensors for Organic Vapors: A Tutorial Review

2021

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Organic vapor sensors are used in diverse applications ranging from environmental monitoring to biomedical diagnostics. Among a number of these sensors, quartz crystal microbalance (QCM) sensors prepared by coating ionic liquids (ILs) or their composites are promising devices for the analysis of volatile organic compounds (VOCs) in complex chemical mixtures. Ionic liquids are remarkable materials, which exhibit tunable physico-chemical properties, chemical and thermal stability, multiple interactions with diverse group of molecules, and enormous structural variability. Moreover, ILs exhibit viscoelastic properties, and hence these materials are ideal for creation of QCM virtual sensor arrays. While the scientific literature on IL-coated QCM sensors is rapidly growing, there is still much to learn. This manuscript provides a comprehensive review on the development of IL-coated QCM sensors and multi-sensor arrays as well as their applications for the analysis of VOCs in complex mixtures. Furthermore, IL-coated QCM virtual sensor arrays and their applications are presented. A short overview of some of the QCM designs, future research areas, and recommendations are also discussed. This short review is a necessary first step towards standardization and further development of QCM for the analysis of VOCs.

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“…Furthermore, some of the methods are also laborious and expensive laboratory processes. Several optical fibre and Bragg grating fibre‐based fuel adulteration sensors have been previously reported by various research groups [11–17]. These optical fibre sensors may show high sensitivity but they suffer from problems like fragility, immobility and cross‐sensitivity [16].…”

Section: Introductionmentioning

confidence: 99%

Proposal of novel photonic crystal fibre for sensing adulterated petrol and diesel with kerosene in terahertz frequencies

Yakasai

Abas

Begum

2020

IET Optoelectronics

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Thinned fibre Bragg grating as a fuel adulteration sensor: simulation and experimental study

Cited by 19 publications

References 19 publications

Asymmetric nanofluidic grating detector for differential refractive index measurement and biosensing

Asymmetric nanofluidic grating detector for differential refractive index measurement and biosensing

Ionic Liquid-Based Quartz Crystal Microbalance Sensors for Organic Vapors: A Tutorial Review

Proposal of novel photonic crystal fibre for sensing adulterated petrol and diesel with kerosene in terahertz frequencies

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