Sensors Around the World: Europe, Middle East, and Africa

deMello, Andrew J.

doi:10.1021/acssensors.1c02550

Cited by 4 publications

(3 citation statements)

References 32 publications

(53 reference statements)

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“…[6][7][8][9][10] These techniques offer high selectivity and sensitivity but suffer from some drawbacks, such as time-consuming procedures, laborintensiveness, expensive instruments, and highly trained personnel. Therefore, it is of urgent demand to develop rapid, noninvasive, and easy-to-operate techniques [11][12][13] for the real-time and on-site detection of L. monocytogenes.…”

Section: Introductionmentioning

confidence: 99%

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A fluorescent film sensor for high‐performance detection of Listeria monocytogenes via vapor sampling

Huang

Lin

et al. 2022

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Foodborne Listeria monocytogenes poses serious threats to public health. Fast and sensitive detection of the pathogen at the point of contamination is thus crucial to halt the spread of bacteria-related diseases. Herein, we report for the first time a fluorescent film sensor to detect the biomarker of L. monocytogenes, 3-hydroxy-2-butanone. The sensor demonstrated unprecedented sensing performance for the analyte with a detection limit lower than 0.05 mg/m 3 , response time less than 1 s, full reversibility, and excellent selectivity. Further study showed that the sensor can be used to monitor the growth of L. monocytogenes with much-improved sensitivity. The superior performance of the sensor is ascribed to the specific binding, efficient charge transfer emission, and porous adlayer structure of the specially designed sensing fluorophore-based film. Our work paves the way to develop a portable detector to meet the needs for on-site and real-time detection of foodborne pathogens.

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Section: Introductionmentioning

confidence: 99%

“…H NMR,13 C NMR, and11 B NMR spectra were obtained on a Bruker AV 600 NMR spectrometer. Mass spectra (MS) were obtained from Bruker Microflex using an APCI source.…”

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confidence: 99%

A fluorescent film sensor for high‐performance detection of Listeria monocytogenes via vapor sampling

Huang

Lin

et al. 2022

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“…This both limits measurement frequency and increases the chance that toxic species like hydrogen peroxide are generated. The optical sensor approach is suitable for high-frequency, on-line analysis and is capable of detecting both pH and DO in one measurement. , Optical nanosensors , and 2D optical sensors measuring pH and O 2 simultaneously have received great attention, − and optical dual pH and O 2 sensing platforms built upon microfluidic continuous bioreactors have been reported. − However, most of these devices are integrations of two sensing components in one chip and report pH and O 2 independently.…”

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confidence: 99%

Robust Dual Optical Sensor for pH and Dissolved Oxygen

2022

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As part of moving our optical pH and dissolved oxygen (DO) optical chemosensors toward industrial applications, we decided to explore a many-sensors-in-one principle. It was tested if physical segregation of the optical sensor components in a single sensor polymer could remove cross-talk and quenching. It was found that a design concept with an oxygen-responsive dye in polymer nanoparticles and a pH-responsive dye in an organically modified siloxane polymer resulted in a robust pH/O 2 dual optical sensor. Individually, the O 2 -sensitive nanoparticles, a known component for optical DO sensing, and the pH sensor are operational. Thus, it was decided to test if nanoparticles enclosed within the pH-sensitive responsive sol−gel (i) could work together if segregated and (ii) could operate with a single intensity signal that is without a reference signal; developments within industrial optical sensor technology indicate that this should be feasible. The prototype optode produced in this work was shown to have a negligible drift over 60 h, bulk diffusion-limited DO response, and independent response to pH and O 2 . On the individual optode, pH calibration was found to show the expected sigmoidal shape and pK a , while the complexity of the calibration function for the DO signal was significant. While the engineering of the sensor device, optics, and hardware are not robust enough to attempt generic sensor calibration, it was decided to demonstrate the design concept in simple fermentation experiments. We conclude that the dual sensor design with the physical segregation of components is viable.

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An ultra-sensitive fluorescent Aptamer sensor based on 2D MOF for detection of HER2 in serum

Li,

Zhang,

et al. 2023

Microchemical Journal

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Sensors Around the World: Europe, Middle East, and Africa

Cited by 4 publications

References 32 publications

A fluorescent film sensor for high‐performance detection of Listeria monocytogenes via vapor sampling

A fluorescent film sensor for high‐performance detection of Listeria monocytogenes via vapor sampling

Robust Dual Optical Sensor for pH and Dissolved Oxygen

An ultra-sensitive fluorescent Aptamer sensor based on 2D MOF for detection of HER2 in serum

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