NH3 and H2S real-time detection in the humid air by two-layer Langmuir-Schaefer OFETs

Trul, Askold A.; Chekusova, Victoria P.; Polinskaya, Marina S.; Киселев, А. Н.; Agina, Elena V.; Ponomarenko, Sergei A.

doi:10.1016/j.snb.2020.128609

Cited by 33 publications

(16 citation statements)

References 50 publications

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“…They have not only different metals in the coordinating centers but also various film morphologies presented in Supplementary Fig. S4, all affecting on the specific interactions with studied gases and improving the array discriminative ability 50 . However, the choice of particular receptors is not limited to these three metalloporphyrins and could be varied in accordance to the desired application.…”

Section: Introductionmentioning

confidence: 99%

Fully integrated ultra-sensitive electronic nose based on organic field-effect transistors

Anisimov

Chekusova

Trul

et al. 2021

Sci Rep

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Modern solid-state gas sensors approaching ppb-level limit of detection open new perspectives for process control, environmental monitoring and exhaled breath analysis. Organic field-effect transistors (OFETs) are especially promising for gas sensing due to their outstanding sensitivities, low cost and small power consumption. However, they suffer of poor selectivity, requiring development of cross-selective arrays to distinguish analytes, and environmental instability, especially in humid air. Here we present the first fully integrated OFET-based electronic nose with the whole sensor array located on a single substrate. It features down to 30 ppb limit of detection provided by monolayer thick active layers and operates in air with up to 95% relative humidity. By means of principal component analysis, it is able to discriminate toxic air pollutants and monitor meat product freshness. The approach presented paves the way for developing affordable air sensing networks for the Internet of Things.

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Section: Introductionmentioning

confidence: 99%

Fully integrated ultra-sensitive electronic nose based on organic field-effect transistors

Anisimov

Chekusova

Trul

et al. 2021

Sci Rep

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“…This value was used as a starting point for estimation of the OFET response on different concentrations of ethanethiol as a relative difference of the drain current caused by the analyte addition using the same algorithm as described earlier. [27] Cu-TPP receptor layer was added to the substrate in order to increase sensitivity to sulfur-containing compounds. Figure 7 demonstrates a typical response timeline and corresponding response curve (it worth to note that these data were achieved as a mean value of two measurements showed at Figure S15, Supporting Information, which indicates the response reproducibility) of an OFET with PMMA interface layer for ethanethiol sensing in the humid air with relative humidity of 95%.…”

Section: Resultsmentioning

confidence: 99%

“…According to them, changing in electrical properties of the OFET sensor device in the presence of sulfur-containing compounds like hydrogen sulfide or alkane thiols could be associated with the analyte absorption on domain boundaries of the semiconducting layer. [21b] Further investigations [27] showed that usage of the receptor layer based on Cu-TPP significantly increase the device sensitivity to hydrogen sulfide due to specific interaction of thiol-group with Cu 2+ ion and the changes observed in the layer morphology, which increases the amount of grain boundaries. We suggest that application of the receptor layer allowing effective analyte absorption as well as operational stability of the OFET device providing accurate response registration are the main reasons of high sensitivity to ethanethiol observed.…”

Section: Resultsmentioning

confidence: 99%

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Operationally Stable Ultrathin Organic Field Effect Transistors Based on Siloxane Dimers of Benzothieno[3,2‐b][1]Benzothiophene Suitable for Ethanethiol Detection

Trul

Chekusova

Anisimov

et al. 2022

Adv Elect Materials

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Ultrathin organic field effect transistors (OFETs) demonstrate great potential as highly sensitive gas sensors since its electrical performance strongly depends on the environment. However, fabrication of high performance OFETs with reliable operational stability for continuous measurements by fast, rather simple, and inexpensive technique is still a challenge. Herein, electrical and sensing properties of ultrathin OFETs based on siloxane dimers of benzothieno[3,2‐b][1]benzothiophene (BTBT) with different aliphatic spacer lengths fabricated by Langmuir–Blodgett, Langmuir–Schaefer (LS) or spin‐coating techniques are studied, compared and optimized. Investigation of the influence of interface dielectric layer on electrical performance and operational stability of the devices allowed obtaining uniform low‐defect ultrathin semiconducting layers responsible for improved electrical performance. Field‐effect mobility up to 0.47 cm2 V−1 s−1 is achieved for the devices based on the dimer with undecylenic spacer between the BTBT core and disiloxane central fragment fabricated by LS method on the top of poly(methyl methacrylate) interface layer. Promising operational stability lead to advanced sensory properties demonstrated by sensing of ethanethiol with the limit of detection of 30 ppb in the humid air, which is a record value for portable sensing technologies.

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“…The resulting low-cost SnO 2 -based sensor exhibited a better response toward H 2 S at room temperature than ZnO-based sensor. 82 Furthermore, a low power (low operating voltages and currents) and fast approach H 2 S sensor was reported by Ponomarenko et al 83 The method was on the basis of a metal-containing porphyrin receptor layer used to modify an LS monolayer active layer. The obtained sensor demonstrated high sensitivity toward H 2 S reaching 70-180 ppb under air with relative humidity up to 60%, coupled with good reproducibility.…”

Section: H 2 S Gas Sensorsmentioning

confidence: 99%

Recent progress in organic field‐effect transistor‐based chem/bio‐sensors

Luo

Liu

2022

VIEW

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Recent decades have witnessed the huge successes of organic field‐effect transistors (OFETs) and their applications. Among them, OFET‐based sensors have shown promising applications in the field of food safety, industrial security, environmental, and health monitoring. This is due to their advantages in solution processability, flexibility, light weight, and variety in molecular design. This review highlights recent progress in OFET‐based chemical and biological sensors in gas and liquid phase, especially for the past 5 years. The analytes range from small molecules to large biomolecules. The optimizations of OFET devices for sensors, including the semiconducting layers, dielectric layers, electrodes, and their interfaces etc., are illustrated. And their relationships with sensing parameters (sensitivity, selectivity, and response time) as well as the sensing mechanisms are given. Finally, the remaining challenges are discussed. We expect that this review can offer inspiration for future design of OFET‐based sensors.

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NH3 and H2S real-time detection in the humid air by two-layer Langmuir-Schaefer OFETs

Cited by 33 publications

References 50 publications

Fully integrated ultra-sensitive electronic nose based on organic field-effect transistors

Fully integrated ultra-sensitive electronic nose based on organic field-effect transistors

Operationally Stable Ultrathin Organic Field Effect Transistors Based on Siloxane Dimers of Benzothieno[3,2‐b][1]Benzothiophene Suitable for Ethanethiol Detection

Recent progress in organic field‐effect transistor‐based chem/bio‐sensors

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