Emerging 2D hybrid nanomaterials: towards enhanced sensitive and selective conductometric gas sensors at room temperature

Hashtroudi, Hanie; Mackinnon, Ian D.R.; Shafiei, Mahnaz

doi:10.1039/d0tc01968b

Cited by 61 publications

(48 citation statements)

References 120 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently developed nanomaterials provide distinctive characteristics, such as small size, large surface area, and unique physical/optical properties for versatile applications, including biomarkers detection. Amongst the nanomaterials harnessed as biosensors, twodimensional (2D) nanocomposites are promising platforms as nanosensors for probing viruses due to their high surface area, good biocompatibility, and simple structure, and, more importantly, the unique electronic/optoelectronic/electrochemical properties for easy functionalization [54]. Hence, these excellent properties render them a prominent position in the next-generation nanotechnologies for viral recognition.…”

Section: Recently Advanced Biosensors As Alternative Viral Detection Methodsmentioning

confidence: 99%

Recent Advances in Two-Dimensional Transition Metal Dichalcogenide Nanocomposites Biosensors for Virus Detection before and during COVID-19 Outbreak

et al. 2021

View full text Add to dashboard Cite

The deadly Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) outbreak has become one of the most challenging pandemics in the last century. Clinical diagnosis reports a high infection rate within a large population and a rapid mutation rate upon every individual infection. The polymerase chain reaction has been a powerful and gold standard molecular diagnostic technique over the past few decades and hence a promising tool to detect the SARS-CoV-2 nucleic acid sequences. However, it can be costly and involved in complicated processes with a high demand for on-site tests. This pandemic emphasizes the critical need for designing cost-effective and fast diagnosis strategies to prevent a potential viral source by ultrasensitive and selective biosensors. Two-dimensional (2D) transition metal dichalcogenide (TMD) nanocomposites have been developed with unique physical and chemical properties crucial for building up nucleic acid and protein biosensors. In this review, we cover various types of 2D TMD biosensors available for virus detection via the mechanisms of photoluminescence/optical, field-effect transistor, surface plasmon resonance, and electrochemical signals. We summarize the current state-of-the-art applications of 2D TMD nanocomposite systems for sensing proteins/nucleic acid from different types of lethal viruses. Finally, we identify and discuss the advantages and limitations of TMD-based nanocomposites biosensors for viral recognition.

show abstract

Section: Recently Advanced Biosensors As Alternative Viral Detection Methodsmentioning

confidence: 99%

Recent Advances in Two-Dimensional Transition Metal Dichalcogenide Nanocomposites Biosensors for Virus Detection before and during COVID-19 Outbreak

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Furthermore, various innovative nanostructured materials and their composites have been tested. Among them, noteworthy are the 2D semiconductors (e.g., transition metal dichalcogenides and graphene), which highlight very interesting sensing performances due to their high area-to-volume ratio, high number of active sites and excellent electrical properties [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Low-Power Chemoresistive Gas Sensor: Predictive Thermal Modelling and Mechanical Failure Analysis

Gaiardo

Novel

Scattolo

et al. 2021

Sensors

View full text Add to dashboard Cite

The substrate plays a key role in chemoresistive gas sensors. It acts as mechanical support for the sensing material, hosts the heating element and, also, aids the sensing material in signal transduction. In recent years, a significant improvement in the substrate production process has been achieved, thanks to the advances in micro- and nanofabrication for micro-electro-mechanical system (MEMS) technologies. In addition, the use of innovative materials and smaller low-power consumption silicon microheaters led to the development of high-performance gas sensors. Various heater layouts were investigated to optimize the temperature distribution on the membrane, and a suspended membrane configuration was exploited to avoid heat loss by conduction through the silicon bulk. However, there is a lack of comprehensive studies focused on predictive models for the optimization of the thermal and mechanical properties of a microheater. In this work, three microheater layouts in three membrane sizes were developed using the microfabrication process. The performance of these devices was evaluated to predict their thermal and mechanical behaviors by using both experimental and theoretical approaches. Finally, a statistical method was employed to cross-correlate the thermal predictive model and the mechanical failure analysis, aiming at microheater design optimization for gas-sensing applications.

show abstract

“…Hence, designing and researching novel gas-sensor materials with high sensitivity and selectivity has paramount importance in the detection and monitoring of polluting gases in the modern era. 1 − 7 In the past decades, a tremendous amount of two-dimensional (2D) nanomaterials, 6 − 16 such as graphene and related 2D crystals, phosphorene, transition metal dichalcogenides, and MXenes, have been extensively used as gas-sensing materials owing to their ultrahigh specific surface area, strong surface activities, high mobility, excellent thermal and electrical conductivities, and high chemical and thermodynamic stability.…”

Section: Introductionmentioning

confidence: 99%

Adsorption, Gas-Sensing, and Optical Properties of Molecules on a Diazine Monolayer: A First-Principles Study

et al. 2021

View full text Add to dashboard Cite

Using first-principles calculations, the structural, electronic, and optical properties of CO 2 , CO, N 2 O, CH 4 , H 2 , N 2 , O 2 , NH 3 , acetone, and ethanol molecules adsorbed on a diazine monolayer were studied to develop the application potential of the diazine monolayer as a room-temperature gas sensor for detecting acetone, ethanol, and NH 3 . We found that these molecules are all physically adsorbed on the diazine monolayer with weak adsorption strength and charge transfer between the molecules and the monolayer, but the physisorption of only NH 3 , acetone, and ethanol remarkably modified the electronic properties of the diazine monolayer, especially for the obvious change in electric conductivity, showing that the diazine monolayer is highly sensitive to acetone, NH 3 , and ethanol. Further, the adsorption of NH 3 , acetone, and ethanol molecules remarkably modifies, in varying degrees, the optical properties of the diazine monolayer, such as work function, absorption coefficient, and the reflectivity, whereas adsorption of other molecules has infinitesimal influence. The different adsorption behaviors and influences of the electronic and optical properties of molecules on the monolayer show that the diazine monolayer has high selectivity to NH 3 , acetone, and ethanol. The recovery time of NH 3 , acetone, and ethanol molecules is, respectively, 1.2 μs, 7.7 μs, and 0.11 ms at 300 K. Thus, the diazine monolayer has a high application potential as a room-temperature acetone, ethanol, and NH 3 sensor with high performance (high selectivity and sensitivity, and rapid recovery time).

show abstract

Emerging 2D hybrid nanomaterials: towards enhanced sensitive and selective conductometric gas sensors at room temperature

Abstract: Gas sensing performance of conductometric devices based on 2D hybrid nanomaterials operating at room temperature.

Cited by 61 publications

References 120 publications

Recent Advances in Two-Dimensional Transition Metal Dichalcogenide Nanocomposites Biosensors for Virus Detection before and during COVID-19 Outbreak

Recent Advances in Two-Dimensional Transition Metal Dichalcogenide Nanocomposites Biosensors for Virus Detection before and during COVID-19 Outbreak

Optimization of a Low-Power Chemoresistive Gas Sensor: Predictive Thermal Modelling and Mechanical Failure Analysis

Adsorption, Gas-Sensing, and Optical Properties of Molecules on a Diazine Monolayer: A First-Principles Study

Contact Info

Product

Resources

About