Contactless Optical Fiber Interferometric Sensor to Monitor Water Content in Ethanol

Moreno-Hernández, Carlos; Quiroz, Osvaldo Rodriguez; Monzón-Hernández, David; Villatoro, Joel

doi:10.1109/jsen.2018.2808683

Cited by 11 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This proposed alcohol sensor exhibited a very low LOD of near 0.5 vol % for DMSO and 1 vol % for all alcohols; that is, isopropanol, methanol, and ethanol (Figure ). Compared to other hydrogel-based alcohol sensors, the developed fiber sensor has the lowest LOD, to the best of our knowledge. ,− The low LOD and quick response time could be due to the high surface area provided by the nano-stepped Aztec structures, which were imprinted into the responsive hydrogel. This allowed for quick exposure and interaction between the hydrogel matrix and the solutions.…”

Section: Resultsmentioning

confidence: 92%

Nanostructured Photonic Hydrogels for Real-Time Alcohol Detection

Ahmed

Elsherif

Park

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Rapid, reliable, and reusable sensors with a low limit of detection can play a vital role in alcohol detection, which is vital in a myriad of industries. Herein, hydrogel-based fiber optic probes were developed for alcohol sensing by a simple, rapid, and facile process. Aztec microstructures with a periodicity of 3 μm were imprinted onto alcohol-sensitive hydrogels for fabricating stand-alone and fiber optic sensors. The hydrogel matrix undergoes swelling in response to alcohol solutions, altering its diffraction efficiency. The real-time sensing capability of the developed sensors was demonstrated in response to various concentrations of ethanol, isopropanol, methanol, and dimethyl sulfoxide in the concentration range of 0 to 50 vol %. For the stand-alone sensors, sensitivities of 23, 21, and 15 μW/vol % were recorded for dimethyl sulfoxide (DMSO), isopropanol, and ethanol, respectively. For the optical fiber probes, sensitivities of 2.3, 2.2, 1.94, and 1.14 μW/vol % were recorded for DMSO, isopropanol, ethanol, and methanol, respectively. A fast response time of 20 s was recorded for both stand-alone and optical fiber sensors. Higher sensitivity toward DMSO was observed, with a low limit of detection of 0.5 vol %. The developed optical fiber sensors may have applications in remote and real-time alcohol sensing in forensics, medicine, food, and beverage manufacturing industries.

show abstract

Section: Resultsmentioning

confidence: 92%

Nanostructured Photonic Hydrogels for Real-Time Alcohol Detection

Ahmed

Elsherif

Park

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The d spacing of the synthesized RC-CDs was calculated using Bragg’s equation () according to the position of the peak. Based on the equation, n is a positive integer, λ shows the wavelength of the incident X-ray (λ = 1.54 Å), and θ ascribes the position of the peak n λ = 2 d sin θ …”

Section: Resultsmentioning

confidence: 99%

One-Step Solvothermal Synthesis of Red Chiral Carbon Dots for Multioptical Detection of Water in Organic Solvents

Hallaji

Bagheri

Ranjbar

2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Water is a typical impurity in organic solvents, so it is significant to determine its presence quantitatively and qualitatively. Herein, we developed UV−visible, fluorescence, and circular dichroism methods for water detection based on red-emitting chiral carbon dots (RC-CDs). Chiral CDs are generating much interest because of their remarkable optical characteristics, but synthesizing RC-CDs and maintaining their chiral structures remain challenging in terms of precursors and synthesis methods. In this work, we reported a new approach for synthesizing RC-CDs via simple solvothermal processing of the common precursors L-tyrosine (L-Tyr) and ophenylenediamine (o-PDA) utilizing H 2 O/H 2 SO 4 as the solvent. The asprepared RC-CDs exhibit an ultranarrow full width at half-maximum (fwhm = ∼27 nm) emission at 627 nm with a quantum yield of 16.2%. Moreover, the prepared RC-CDs were applied to evaluate their multioptical response to detect water from 10 to 100% (v/v) in ethanol. RC-CDs demonstrate remarkable linearity in UV−visible, fluorescence, and circular dichroism spectroscopy to the water content changes in ethanol. Notably, the use of chiral CDs in optical detection through circular dichroism has not been reported before. In summary, we believe that this work can expand the synthetic routes of RC-CDs and provide an early step for exciting opportunities for the design of functional chiroptical materials.

show abstract

“…A contactless optical fiber sensor for monitoring water content in ethanol was also described. 183 It consisted of a multicavity Fabry−Peŕot interferometer at the fiber tip and a quartz cell. The increment of water content in ethanol induced a change in RI of the cell cavity, which further increased the light absorption.…”

Section: Analytical Chemistrymentioning

confidence: 99%

“…Operated in the SPR mode at 1550 nm, the signal increases linearly with increasing concentration of water in the range of 1–10%. A contactless optical fiber sensor for monitoring water content in ethanol was also described . It consisted of a multicavity Fabry–Pérot interferometer at the fiber tip and a quartz cell.…”

Section: Sensors For Humidity and Water Fractionmentioning

confidence: 99%