A Molecularly Imprinted Fluoral-P/Polyaniline Double Layer Sensor System for Selective Sensing of Formaldehyde

Antwi-Boampong, Sadik; Peng, James S.; Carlan, Jean; BelBruno, Joseph J.

doi:10.1109/jsen.2014.2298872

Cited by 21 publications

(7 citation statements)

References 36 publications

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“…The ability to sense NH 3 in a low-ppb range can be transferred to the indirect detection of other toxic gases, where NH 3 is a by-product of a certain chemical reaction triggered by an applied organic compound or catalyst. For example, formaldehyde gas was detected by using polyaniline (PANI) as a sensing material for NH 3 produced as a by-product of an organic reaction between formaldehyde and Fluoral-P [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Korent

Soderžnik

Šturm

et al. 2020

Sensors

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Polyaniline (PANI) is a conducting polymer, widely used in gas-sensing applications. Due to its classification as a semiconductor, PANI is also used to detect reducing ammonia gas (NH3), which is a well-known and studied topic. However, easier, cheaper and more straightforward procedures for sensor fabrication are still the subject of much research. In the presented work, we describe a novel, more controllable, synthesis approach to creating NH3 PANI-based receptor elements. The PANI was electrochemically deposited via cyclic voltammetry (CV) on screen-printed electrodes (SPEs). The morphology, composition and surface of the deposited PANI layer on the Au electrode were characterised with electron microscopy, Fourier-transform infrared spectroscopy and profilometry. Prior to the gas-chamber measurement, the SPE was suitably modified by Au sputtering the individual connections between the three-electrode system, thus showing a feasible way of converting a conventional three-electrode electrochemical SPE system into a two-electrode NH3-gas detecting system. The feasibility of the gas measurements’ characterisation was improved using the gas analyser. The gas-sensing ability of the PANI-Au-SPE was studied in the range 32–1100 ppb of NH3, and the sensor performed well in terms of repeatability, reproducibility and sensitivity.

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Section: Introductionmentioning

confidence: 99%

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Korent

Soderžnik

Šturm

et al. 2020

Sensors

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“…These optical sensors generally function by fluorescence quenching and rely on quantum dots as the active element. The quantum dot is activated by a coating that is then used in the reaction that leads to the imprinted polymer layer; adding the specificity of the MIP does not detract from the 230 16 aldehydes 247 0.3 SPR α-pinene 232 0.9 formaldehyde 233 33 chemiresistor nitrobenzene 228 16 ethanol 229 11 formaldehyde 248,249 1 toluene 250 8.7 hydrogen cyanide 251 6.5 acetone, chloroform, isopropyl alcohol, toluene 252 74 mango ripeness 227 intrinsic fluorescence of the quantum dot. The binding efficiency is monitored by the decrease in signal, and reports of as much as 93% quenching have been reported.…”

Section: Other Sensors/sensitivitymentioning

confidence: 99%

Molecularly Imprinted Polymers

2018

Self Cite

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Molecularly imprinted polymers are synthetic receptors for a targeted molecule. As such, they are analogues of the natural antibody–antigen systems. In this review, after a recounting of the early history of the general field, we specifically focus on the application of these polymers as sensors. In these applications, the polymers are paired with a reporting system, which may be electrical, electrochemical, optical, or gravimetric. The presence of the targeted molecule effects a change in the reporting agent, and a calibrated quantity of the target is recorded. In this review, we describe the imprinted polymer production processes, the techniques used for reporting, and the applications of the reported sensors. A brief survey of recent applications to gas-phase sensing is included, but the focus is primarily on the development of sensors for targets in solution. Included among the applications are those designed to detect toxic chemicals, toxins in foods, drugs, explosives, and pathogens. The application of computational chemistry to the development of new imprinted polymers is included as is a brief assessment of future developments.

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“…Detection of formaldehyde is usually done by using different techniques such as spectrophotometry [ 5 ], HPLC [ 6 ], laser induced fluorescence spectroscopy [ 7 ] capillary electrophoresis [ 8 ], conductometry [ 9 , 10 , 11 ] and enzyme-based biosensors [ 12 , 13 , 14 ]. However, these methods still show certain limitations such as limited selectivity and reliability in the presence of interferents, operational complexity, non-portability or difficulties in real-time monitoring.…”

Section: Introductionmentioning

confidence: 99%

A New Environmentally-Friendly Colorimetric Probe for Formaldehyde Gas Detection under Real Conditions

et al. 2018

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A new environmentally-friendly, simple, selective and sensitive probe for detecting formaldehyde, based on naturally-occurring compounds, through either colorimetric or fluorescence changes, is described. The probe is able to detect formaldehyde in both solution and the gas phase with limits of detection of 0.24 mM and 0.7 ppm, respectively. The probe has been tested to study formaldehyde emission in contaminated real atmospheres. The supported probe is easy to use and to dispose, and is safe and suitable as an individual chemodosimeter.

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A Molecularly Imprinted Fluoral-P/Polyaniline Double Layer Sensor System for Selective Sensing of Formaldehyde

Cited by 21 publications

References 36 publications

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Molecularly Imprinted Polymers

A New Environmentally-Friendly Colorimetric Probe for Formaldehyde Gas Detection under Real Conditions

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