Organic Materials for Chemical Sensing

Ray, Asim K.

doi:10.1007/978-0-387-29185-7_54

Cited by 5 publications

(5 citation statements)

References 189 publications

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“…By increasing the aspect ratio through proper design of the electrode structure, it would be possible to significantly decrease the resistance. This combined with the fact that the NO 2 detection took place at room temperature and the low production costs of the layer, it could be possible to produce commercially relevant, disposable NO 2 gas-sensing devices. The idea to combine organic receptors with inorganic transducers is very appealing as organics enable the introduction of specific groups that can selectively react with certain target gases. − Here, the CQDs are stabilized with oleic acid, which is irreversibly consumed by NO 2 . Although there already exist other reports of organic materials used for NO 2 sensing, − the combination of different organics with inorganic transducers opens up a whole new world of materials for gas sensing. Even if the sensor signal to NO 2 is low at the end, it is quite remarkable that it is reversible at room temperature.…”

Section: Discussionmentioning

confidence: 99%

“…The idea to combine organic receptors with inorganic transducers is very appealing as organics enable the introduction of specific groups that can selectively react with certain target gases. − Here, the CQDs are stabilized with oleic acid, which is irreversibly consumed by NO 2 . Although there already exist other reports of organic materials used for NO 2 sensing, − the combination of different organics with inorganic transducers opens up a whole new world of materials for gas sensing.…”

Section: Discussionmentioning

confidence: 99%

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Operando Investigation of the Aging Mechanism of Lead Sulfide Colloidal Quantum Dots in an Oxidizing Background

Ruß

Junker

et al. 2021

J. Phys. Chem. C

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Lead sulfide (PbS) is a p-type semiconductor that is often applied in photodetectors and solar cells. One major problem that researchers are regularly confronted with is the loss of performance when operated in air. The sensitivity to the ambient, however, makes it an interesting material for the application in gas sensors. Although a lot of research has been focused on the aging of PbS, the influencing factors and the associated material changes are still a matter of debate. Resistance measurements of differently prepared PbS samples operated as sensors for the detection of NO2 (a strongly oxidative gas) in combination with surface-sensitive methods (diffuse reflectance infrared Fourier transform spectroscopy and X-ray photoelectron spectroscopy) enabled the investigation of the changes associated with aging and their influence on the sensing mechanism. The aging mechanism was found to be predominantly influenced by the presence of residuals of the stabilizing agent oleic acid that was adsorbed at the surface of the colloidal quantum dots. Additionally, it was found that a byproduct of the consumption of oleic acid enhanced the detected sensor signal.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Operando Investigation of the Aging Mechanism of Lead Sulfide Colloidal Quantum Dots in an Oxidizing Background

Ruß

Junker

et al. 2021

J. Phys. Chem. C

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“…In order to deal with the challenging task of monitoring the concentration levels of selected analytes-targets in complex vapour environment, a sensor array of semi-selective components is used [13,23]. Each sensor of the array will respond to a certain group of chemical elements showing in most cases a broad and accordingly an overlapping response to the individual compounds.…”

Section: Sensor Fabrication and Evaluationmentioning

confidence: 99%

Ultra miniaturized InterDigitated electrodes platform for sensing applications

Wang

Syed

Bhattacharya

et al. 2020

Microelectronic Engineering

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“…Over the recent few decades, organic semiconductors have drawn tremendous attention in the development of electronic devices such as organic light-emitting diodes (OLEDs) [ 1 ], organic photovoltaics (OPVs) [ 2 ], organic field-effect transistors (OFETs) [ 3 ], organic lasers [ 4 ], memory devices [ 5 ] and chemical sensors [ 6 ]. Some of these devices have already attained innovation maturity and have been transferred from the benches of research labs to the shelves of the market.…”

Section: Introductionmentioning

confidence: 99%

Organic Heterojunction Devices Based on Phthalocyanines: A New Approach to Gas Chemosensing

Kumar

Meunier‐Prest

Bouvet

2020

Sensors

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Organic heterostructures have emerged as highly promising transducers to realize high performance gas sensors. The key reason for such a huge interest in these devices is the associated organic heterojunction effect in which opposite free charges are accumulated at the interface making it highly conducting, which can be exploited in producing highly sensitive and faster response kinetics gas sensors. Metal phthalocyanines (MPc) have been extensively studied to fabricate organic heterostructures because of the large possibilities of structural engineering which are correlated with their bulk thin film properties. Accordingly, in this review, we have performed a comprehensive literature survey of the recent researches reported about MPc based organic heterostructures and their application in gas sensors. These heterostructures were used in Organic Field-Effect Transistor and Molecular Semiconductor—Doped Insulator sensing device configurations, in which change in their electrical properties such as field-effect mobility and saturation current in the former and current at a fixed bias in the latter under redox gases exposure were assessed to determine the chemosensing performances. These sensing devices have shown very high sensitivity to redox gases like nitrogen dioxide (NO2), ozone and ammonia (NH3), which monitoring is indispensable for implementing environmental guidelines. Some of these sensors exhibited ultrahigh sensitivity to NH3 demonstrated by a detection limit of 140 ppb and excellent signal stability under variable humidity, making them among the best NH3 sensors.

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Organic Materials for Chemical Sensing

Cited by 5 publications

References 189 publications

Operando Investigation of the Aging Mechanism of Lead Sulfide Colloidal Quantum Dots in an Oxidizing Background

Operando Investigation of the Aging Mechanism of Lead Sulfide Colloidal Quantum Dots in an Oxidizing Background

Ultra miniaturized InterDigitated electrodes platform for sensing applications

Organic Heterojunction Devices Based on Phthalocyanines: A New Approach to Gas Chemosensing

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