Toward high selectivity of sensor arrays: Enhanced adsorption interaction and selectivity of gas detection (N2, O2, NO, CO, CO2, NO2, SO2, AlH3, NH3, and PH3) on transition metal dichalcogenides (MoS2, MoSe2, and MoTe2)

Acta Materialia, Journal Year: 2024, Volume and Issue: 274, P. 120016 - 120016

Published: May 16, 2024

Resistive gas sensors are essential for monitoring air quality, ensuring industrial safety, and controlling automotive emissions. However, conventional materials used sensing layers often suffer from poor selectivity require elevated operating temperatures, limiting their effectiveness. This study introduces a novel approach to address these challenges by utilizing the intrinsic physicochemical properties of Mo-bearing transition-metal dichalcogenides (TMDs). The findings reveal that variable charge availability on TMD surfaces leads highly selective adsorption enhancements, resulting in significant differences responses various molecules, even at room temperature. results an exceptional relative sensitivity monolayers, which case combustion products exceeds what is feasible under same conditions such as ZnO TiO2 three orders magnitude. Such unprecedented variation distinct profiles. enables effective cross-referencing responses, offering benefits sensor arrays. Consequently, relatively simple setups, TMD-based devices have potential prevent false-positive signals enable determination composition mixtures, which, if utilized, could revolutionize field with innovative lab-on-a-chip solutions.

Language: Английский

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Transition metals vs. chalcogens: The impact on NOx adsorption on MoS2, MoSe2 and WS2 transition-metal dichalcogenides

Acta Materialia, Journal Year: 2024, Volume and Issue: 272, P. 119949 - 119949

Published: April 23, 2024

The widely developed industry of today generates significant amounts harmful gases, which prompts the search for modern materials allowing their efficient and reliable detection. Transition-metal dichalcogenides (TMD) constitute well-known example such, with particularly high potential excellent sensing NO2. It is known, that adsorption this hazardous molecule varies on TMD composition, however importance transition metal chalcogen types were never previously contrasted. Moreover, other NOx compounds, namely NO N2, interact much less sheets, reason not yet well understood. This work utilizes density functional theory (DFT) approach to untangle these problems by examining processes NO2, NO, N2 monolayers WS2, MoS2, MoSe2. calculations allowed establish two important conclusions: (i) significantly more than metal, greater increase in NO2 MoSe2 as compared (ii) only molecules acting an acceptor respect sheet can benefit from enhancement coming composition latter. gained insight likely contribute informed design devices selective detection, lack a recognized problem among semiconductor sensors.

Language: Английский

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Impact of Molecule–Molecule Interactions When Discerning Low-Concentration Hazardous Gas Mixtures

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Gas sensor arrays are versatile and powerful tools for gas detection analysis, enabling a wide range of applications across numerous industries. Critically, the accuracy reliability these depend on distinct sensing behavior or selectivity individual component sensors. However, studies such often consider only overly idealized scenarios, interaction between molecules is not typically considered in studies. Here, based first-principles calculations direct experimental demonstrations, we show that interactions at surface can play significant role. We found NO2 NH3 be expected to align together form dimers due strong Fermi level, which enhances adsorption capability sensitivity MoS2. Compared with performance MoS2 either alone, faster response observed mixtures. Enhanced sensitivity, however, achieved lower carrier densities an appropriate concentration ratio NH3. These results provide evidence pronounced effect molecule but also suggest approach discerning gases.

Language: Английский

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Highly efficient room-temperature ethylene sensing with molybdenum based transition metal dichalcogenides

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162984 - 162984

Published: March 1, 2025

Language: Английский

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B-Power: Investigating the Upper Limits of Enhanced Surface Reactivity in Doped MoTe₂

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Language: Английский

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Layered MoTe2/ZnO heterojunctions for sensitive TEA sensors at room temperature

Sensors and Actuators B Chemical, Journal Year: 2025, Volume and Issue: unknown, P. 137862 - 137862

Published: April 1, 2025

Language: Английский

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Toward High Selectivity of Sensor Arrays: Enhanced Adsorption Interaction and Selectivity of Gas Detection (N2, O2, NO, CO, CO2, NO2, SO2, AlH3, NH3, and PH3) on Transition Metal Dichalcogenides (MoS2, MoSe2, and MoTe2)

Published: Feb. 22, 2024

Resistive gas sensors are essential for monitoring air quality, ensuring industrial safety, and controlling automotive emissions. However, conventional materials used sensing layers often suffer from poor selectivity require elevated operating temperatures, limiting their effectiveness. This study introduces a novel approach to address these challenges by utilizing the intrinsic physicochemical properties of Mo-bearing transition-metal dichalcogenides (TMDs). The findings reveal that variable charge availability on TMD surfaces leads highly selective adsorption enhancements, resulting in significant differences responses various molecules, even at room temperature. results an exceptional relative sensitivity monolayers, which case combustion products exceeds what is feasible under same conditions such as ZnO TiO2 three orders magnitude. Such unprecedented variation distinct profiles. enables effective cross-referencing responses, offering benefits sensor arrays. Consequently, relatively simple setups, TMD-based devices have potential prevent false-positive signals enable determination composition mixtures, which, if utilized, could revolutionize field with innovative lab-on-a-chip solutions.

Language: Английский

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Transition metals vs. chalcogens: the impact on NOx adsorption on MoS2, MoSe2 and WS2 transition-metal dichalcogenides

Published: Jan. 17, 2024

The widely developed industry of today generates significant amounts harmful gases, which prompts the search for modern materials allowing their efficient and reliable detection. Transition-metal dichalcogenides (TMD) constitute well-known example such, with particularly high potential excellent sensing NO2. It is known, that adsorption this hazardous molecule varies on TMD composition, however importance transition metal chalcogen types were never previously contrasted. Moreover, other NOx compounds, namely NO N2, interact much less sheets, reason not yet well understood. This work utilizes density functional theory (DFT) approach to untangle these problems by examining processes NO2, NO, N2 monolayers WS2, MoS2, MoSe2. calculations allowed establish two important conclusions: (i) significantly more than metal, greater increase in NO2 MoSe2 as compared (ii) only molecules acting an acceptor respect sheet can benefit from enhancement coming composition latter. gained insight likely contribute informed design devices selective detection, lack a recognized problem among semiconductor sensors.

Language: Английский

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Ir-doped MoSe2: A promising candidate for C4F7N decomposed species detection and scavenging

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 51, P. 104634 - 104634

Published: Aug. 1, 2024

Language: Английский

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Unlocking the chemistry of graphene: The impact of charge carrier concentration on molecular adsorption on graphene

Applied Surface Science, Journal Year: 2024, Volume and Issue: 679, P. 161175 - 161175

Published: Sept. 6, 2024

Language: Английский

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