Calibration of Nonstationary Gas Sensors Based on Two-Dimensional Materials

Ricciardella, Filiberto; Lee, Kangho; Stelz, Tobias; Hartwig, Oliver; Prechtl, Maximilian; McCrystall, Mark; McEvoy, Niall; Duesberg, Georg S.

doi:10.1021/acsomega.9b04325

Cited by 21 publications

(15 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The real-time behavior is comparable with the results reported in previous works [46][47][48][49][50][65][66][67][68][69][70], especially in terms of the kinetics of interaction between the sensing layers and the after the exposure to NO 2 . For the sake of clarity, the band structure of graphene was designed similar as that of a single layer of graphene.…”

Section: Resultssupporting

confidence: 88%

Investigation of multi-layered graphene/silicon Schottky junction in oxidizing atmosphere

Ricciardella

Nigro²,

Miscioscia

et al. 2021

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

In this study, we investigate a Schottky junction based on solution-processed multilayered graphene (MLG). We present a rectifying device obtained with a straightforward approach, that is drop-casting a few microliters of MLG solution simultaneously onto Si, Si-SiO 2 and Si-SiO 2 -Cr/Au surface. Monitoring the modulation of Schottky barrier height while operating in reverse bias, we study the behavior of such prepared MLG-Si/junction (MLG-Si/J) when exposed to oxidizing atmosphere, especially to nitrogen oxide (NO 2 ). We finally compare the sensing behavior of MLG-Si/J at 1 ppm of NO 2 with that of a chemiresistor-based on similarly prepared solution-processed MLG. Our study thus opens the path towards low-cost highly sensitive graphene-based heterojunctions advantageously fabricated without any complexity in the technological process.

show abstract

Section: Resultssupporting

confidence: 88%

Investigation of multi-layered graphene/silicon Schottky junction in oxidizing atmosphere

Ricciardella

Nigro²,

Miscioscia

et al. 2021

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although the derivative-based model is simpler, it enables a real-time readout of the concentration only in the special case when the concentration is zero and increasing rapidly, whereas our model enables continuous real-time monitoring of the concentration. The time derivative of the signal during a concentration change, described in [57], is visible in our data as well, depicted by the sharp peaks on the theoretical curve in Figure 7 during concentration changes. In Figure 8, we show the relationship between the product C × β and the actual concentration of CO2.…”

Section: Real-time Concentration Measurementsupporting

confidence: 72%

“…From a practical standpoint, the theoretical model can be used to monitor gas concentration in real time, which is not the case when the experimental data are directly read out. We note that a simpler model, based on the time derivative of the measured signal, has been proposed to relate the measured signal to the gas concentration in 2D materials [57]. Although the derivative-based model is simpler, it enables a real-time readout of the concentration only in the special case when the concentration is zero and increasing rapidly, whereas our model enables continuous real-time monitoring of the concentration.…”

Section: Real-time Concentration Measurementmentioning

confidence: 99%

“…signal, has been proposed to relate the measured signal to the gas concentration in 2D materials [57]. Although the derivative-based model is simpler, it enables a real-time readout of the concentration only in the special case when the concentration is zero and increasing rapidly, whereas our model enables continuous real-time monitoring of the concentration.…”

Section: Real-time Concentration Measurementmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Dioxide Sensing with Langmuir–Blodgett Graphene Films

et al. 2021

View full text Add to dashboard Cite

Graphene has become a material of choice for an increasing number of scientific and industrial applications. It has been used for gas sensing due to its favorable properties, such as a large specific surface area, as well as the sensitivity of its electrical parameters to adsorption processes occurring on its surface. Efforts are ongoing to produce graphene gas sensors by using methods that are compatible with scaling, simple deposition techniques on arbitrary substrates, and ease of use. In this paper, we demonstrate the fabrication of carbon dioxide gas sensors from Langmuir–Blodgett thin films of sulfonated polyaniline-functionalized graphene that was obtained by using electrochemical exfoliation. The sensor was tested within the highly relevant concentration range of 150 to 10,000 ppm and 0% to 100% at room temperature (15 to 35 °C). The results show that the sensor has both high sensitivity to low analyte concentrations and high dynamic range. The sensor response times are approximately 15 s. The fabrication method is simple, scalable, and compatible with arbitrary substrates, which makes it potentially interesting for many practical applications. The sensor is used for real-time carbon dioxide concentration monitoring based on a theoretical model matched to our experimental data. The sensor performance was unchanged over a period of several months.

show abstract

“…However, two dimensional nanomaterials, when compared to 0D, 1D, and 3D counterparts, are more preferable while devising a compact sensor due to the ease with which they form electrical contacts, a larger lateral size and diversity in configuration, flexibility in morphological properties, and their compatibility with thin films. Accordingly, a novel platform for multiplexed in vitro recognition of DNA in a virus causing hepatitis A & B through tracking of dispersal of K+ ions, reported by Yuanyuan Tian et al [ 14 ], and 2D nanomaterial synthesized by thermal assistance [ 15 ] capable of resolving the issues associated with steady-state signals in gas sensors, emphasizes the significance of 2D nanomaterial.…”

Section: Properties Of Nanomaterials In Sensorsmentioning

confidence: 99%

Sensing beyond Senses: An Overview of Outstanding Strides in Architecting Nanopolymer-Enabled Sensors for Biomedical Applications

Malini¹,

Roy

Raj³

et al. 2022

Polymers

View full text Add to dashboard Cite

Nano-enabled sensing is an expanding interdisciplinary field of emerging science with dynamic multifunctional detecting capabilities, equipped with a wide range of multi-faceted nanomaterial having diverse dimensions and composition. They have proven to be highly robust, sensitive, and useful diagnostic tools ranging from advanced industrial processes to ordinary consumer products. As no single nanomaterial has proved to be unparalleled, recent years has witnessed a large number of nanomaterial-based sensing strategies for rapid detection and quantification of processes and substances with a high degree of reliability. Nano-furnished platforms, because of easy fabrication methods and chemical versatility, can serve as ideal sensing means through different transduction mechanisms. This article, through a unified experimental-theoretical approach, uses literature of recent years to introduce, evaluate, and analyze significant developments in the area of nanotechnology-aided sensors incorporating the various classes of nanomaterial. Addressing the broad interests, the work also summarizes the sensing mechanisms using schematic illustrations, attempts to integrate the performance of different categories of nanomaterials in the design of sensors, knowledge gaps, regulatory aspects, future research directions, and challenges of implementing such techniques in standalone devices. In view of a dependency of analysis and testing on sustained growth of sensor-supported platforms, this article inspires the scientific community for more attention in this field.

show abstract

Calibration of Nonstationary Gas Sensors Based on Two-Dimensional Materials

Cited by 21 publications

References 36 publications

Investigation of multi-layered graphene/silicon Schottky junction in oxidizing atmosphere

Investigation of multi-layered graphene/silicon Schottky junction in oxidizing atmosphere

Carbon Dioxide Sensing with Langmuir–Blodgett Graphene Films

Sensing beyond Senses: An Overview of Outstanding Strides in Architecting Nanopolymer-Enabled Sensors for Biomedical Applications

Contact Info

Product

Resources

About