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Boosted interfacial charge transfer in SnO2/SnSe2 …

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The gas sensor based on SnO 2 /SnSe 2 exhibited an ultrahigh response toward 10 ppm H 2 S at room temperature (resistance ratio = 32), roughly and 16 times higher than that of pure SnO 2 and SnSe 2, respectively. Moreover, the sensor exhibited an

Solution‐Processed p‐SnSe/n‐SnSe2 Hetero‐Structure Layers for …

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28/1/2020· This was mainly attributed to the formation of p–n junctions that allowed for gasinduced modification of the junction barriers. Under 405 nm laser illumination, the sensor performance was further enhanced, exhibiting a times increased response toward ppm

Design of hierarchical SnSe2 for efficient detection of trace NO2 at …

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Layered tin diselenide (SnSe2) has aroused widespread scientific interest by virtue of its exceptional chemical, physical, and electrical characteristics. The distinctive features of SnSe2 enable it to be an ideal candidate for efficient detection of NO2 at room ...

Applied Sciences | Free FullText | FirstPrinciples Study for Gas Sensing of Defective SnSe2 …

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We report the interaction between gas molecules (NO2 and NH3) and the SnSe2 monolayers with vacancy and dopants (O and N) for potential applications as gas sensors. Compared with the gas molecular adsorbed on pristine SnSe2 monolayer, the Sevacancy SnSe2 monolayer obviously enhances sensitivity to NO2 adsorption. The Odoped SnSe2 monolayer shows …

Layered amorphous aSnO2 gas sensors by controlled oxidation of …

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2Dlayered amorphous a SnO 2 is utilized for the first time to detect NO 2, H 2 and NH 3 gases at 100°C operating temperature opening new perspectives for the exploitation of amorphous metaloxides interfaces for gas sensing applications. Liquidphase exfoliated 2DSnSe 2 flakes have been subjected to controlled oxidation in air (from 1 h to ...

Layered SnSe2 microflakes and SnSe2/SnO2 heterojunctions for …

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Layered SnSe2 flakes and SnSe2/SnO2 heterojunctionbased chemiresistivetype sensors demonstrate good gas sensing properties at low temperatures. The pure SnSe2based chemiresistivetype sensor exhibited good response and recovery to both NO2 and NH3 while also showing a moderate response to hydrogen, CO, C3

SelfAssembled SnO2/SnSe2 Heterostructures: A Suitable Platform …

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By means of experiments and theory, the gassensing properties of tin diselenide (SnSe2) were elucidated. We discover that, while the stoichiometric single crystal is chemically inert even in air, the nonstoichiometric sample assumes a subnanometric SnO2 surface oxide layer once exposed to ambient atmosphere. The presence of Se vacancies induces the formation of a metastable …

Structural, morphological, optical and sensing properties of SnSe …

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1/1/2020· The gas sensing properties of the SnSe films deposited onto alumina were tested as a sensor material for detection of methane gas. This sensing capability has been reported previously ( Popescu et al., 2007 ), although, the sensing layer was, in fact, a mixture on SnSe 2 and SnO 2 , since the sensor was operated over 500 °C, which produces the oxidation of the …

Layered Amorphous aSnO2 gas sensors by controlled oxidation of 2DSnSe2 …

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27/10/2021· Request PDF | Layered Amorphous aSnO2 gas sensors by controlled oxidation of 2DSnSe2 | 2Dlayered amorphous aSnO2 is utilized for the first time to detect NO2, H2 and ...

Low cost, flexible and disposable SnSe2 based photoresponsive ammonia sensor …

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The SnSe2 based sensor, when irradiated with Near Infra Red (NIR) light exhibited excellent responsivity, detectivity and external quantum efficiency of 70 mA/W, 11 × …

Chemosensors | Free FullText | SnSe2ZnPorphyrin Nanocomposite Thin Films for Threshold Methane Concentration Detection at Room Temperature

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18/12/2020· Nanocomposite thin films, sensitive to methane at the room temperature (25ndash;30 deg;C), have been prepared, starting from SnSe2 powder and Zn(II)5,10,15,20tetrakis(4aminophenyl) porphyrin (ZnTAPP) powder, that were fully characterized by XRD, UVVIS, FTIR, Nuclear Magnetic Resonance (1HNMR and 13CNMR), Atomic Force Microscopy …

SelfAssembled SnO2/SnSe2 Heterostructures: A Suitable Platform for Ultrasensitive NO2 and H2 Sensing…

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By means of experiments and theory, the gassensing properties of tin diselenide (SnSe2) were elucidated. We discover that, while the stoichiometric single crystal is chemically inert even in air, the nonstoichiometric sample assumes a subnanometric SnO2 ...

Structural, morphological, optical and sensing properties of SnSe and SnSe2 thin films as a gas sensing …

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1/1/2020· The gas sensing properties of the SnSe films deposited onto alumina were tested as a sensor material for detection of methane gas. This sensing capability has been reported previously ( Popescu et al., 2007 ), although, the sensing layer was, in fact, a mixture on SnSe 2 and SnO 2 , since the sensor was operated over 500 °C, which produces the oxidation of the layer.

SnO2/SnSe2 Heterostructures for NO2 and H2 Sensing IOPscience

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1/5/2020· SnSe2 crystals have been ground to obtain SnSe2 powder and gas sensing measurements have been performed using a voltamperometric technique. SnSe2 thin films have been prepared by drop casting 10μl of ground powder suspended in Ethanol in the concentration of 1 mg/ml on Si 3 N 4 substrates provided with 30 μmspaced Pt interdigitated electrodes on …

Largescale synthesis of singlecrystalline selfstanding SnSe2 …

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14/9/2018· The sensor drift is shown in figure S5(b), indicating the good reproducibility of the sensor. More importantly, the fabricated PI/SnSe 2 sensors exhibit reliable resistance responses with good repeatability, as shown in figure 4(f) (20 PI/SnSe 2 gas sensors), which 2

Ammonia gas sensing properties and density functional theory investigation of corallike AuSnSe2 …

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1/4/2021· Fig. 2 shows the schematic diagram of the sensing experimental device for NH 3 gas detection. A certain concentration (∼10 ppm) of NH 3 gas was prepared by mixing a certain volume of standard NH 3 gas (10 ppm) and pure air in a 750 mL sealed chamber, in which the standard NH 3 gas was fabricated by evaporating NH 3 ·H 2 O with a concentration of 25 …

Structure, properties and gas sensing effect of SnSe2 films …

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The gas sensing properties of the SnSe films deposited onto alumina were tested as a sensor material for detection of methane gas. This sensing …

2DSnSe 2 Nanosheet Functionalized Piezoresistive Flexible Sensor …

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For wearable gas sensing, twodimensional materials, such as SnSe2, are particularly favorable because of their high surfacetovolume ratio and strong adsorption of gas molecules.

Ammonia gas sensing properties and density functional theory …

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1/4/2021· Fig. 2 shows the schematic diagram of the sensing experimental device for NH 3 gas detection. A certain concentration (∼10 ppm) of NH 3 gas was prepared by mixing a certain volume of standard NH 3 gas (10 ppm) and pure air in a 750 mL sealed chamber, in which the standard NH 3 gas was fabricated by evaporating NH 3 ·H 2 O with a concentration of 25 …

NO₂ Gas Sensor Based on SnSe/SnSe₂ pn Hetrojunction. …

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1/9/2021· NO₂ Gas Sensor Based on SnSe/SnSe ₂pn Hetrojunction. Rani S 1, Kumar M 1, Singh Y 1, Tomar M 2, Sharma A 3, Gupta V 4, Singh VN 1 Author information ...

Layered SnSe2 microflakes and SnSe2/SnO2 heterojunctions for lowtemperature chemiresistivetype gas sensing …

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Layered SnSe 2 flakes and SnSe 2 /SnO 2 heterojunctionbased chemiresistivetype sensors demonstrate good gas sensing properties at low temperatures. The pure SnSe 2based chemiresistivetype sensor exhibited good response and recovery to both NO 2 and NH 3 while also showing a moderate response to hydrogen, CO, C 3 H 6 and several typical volatile organic vapors, such as …

Structural, morphological, optical and sensing properties of SnSe and SnSe2 thin films as a gas sensing …

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1/1/2020· The gas sensing properties of the SnSe films deposited onto alumina were tested as a sensor material for detection of methane gas. This sensing capability has been reported previously ( Popescu et al., 2007 ), although, the sensing layer was, in fact, a mixture on SnSe 2 and SnO 2 , since the sensor was operated over 500 °C, which produces the oxidation of the …

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