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Zare E, Rezaei G, Vaseghi B. Comment on “Computational study of H$$_{2}$$S adsorption on the pristine and transitional metal-doped phosphorene”. J Mol Model 2022; 28:263. [DOI: 10.1007/s00894-022-05255-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 07/31/2022] [Indexed: 11/29/2022]
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Nagarajan V, Chandiramouli R. CS 2 And H 2S adsorption studies on novel hex-star phosphorene nanosheet – a DFT perspective. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2066027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- V. Nagarajan
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, India
| | - R. Chandiramouli
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, India
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Krik S, Valt M, Gaiardo A, Fabbri B, Spagnoli E, Caporali M, Malagù C, Bellutti P, Guidi V. Elucidating the Ambient Stability and Gas Sensing Mechanism of Nickel-Decorated Phosphorene for NO 2 Detection: A First-Principles Study. ACS OMEGA 2022; 7:9808-9817. [PMID: 35350331 PMCID: PMC8945183 DOI: 10.1021/acsomega.2c00078] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
In the field of layered two-dimensional functional materials, black phosphorus has attracted considerable attention in many applications due to its outstanding electrical properties. It has experimentally shown superior chemical sensing performance for the room temperature detection of NO2, highlighting high sensitivity at a ppb level. Unfortunately, pristine black phosphorus demonstrated an unstable functionality due to the fast degradation of the material when exposed to the ambient atmosphere. In the present work, a deepened investigation by density functional theory was carried out to study how nickel decoration of phosphorene can improve the stability of the material. Further, an insight into the sensing mechanism of nickel-loaded phosphorene toward NO2 was given and compared to pristine phosphorene. This first-principles study proved that, by introducing nickel adatoms, the band gap of the material decreases and the positions of the conduction band minimum and the valence band maximum move toward each other, resulting in a drop in the conduction band minimum under the redox potential of O2/O2 -, which may result in a more stable material. Studying the adsorption of O2 molecules on pristine phosphorene, we also proved that all oxygen molecules coming from the surrounding atmosphere react with phosphorus atoms in the layer, resulting in the oxidation of the material forming oxidized phosphorus species (PO x ). Instead, by introducing nickel adatoms, part of the oxygen from the surrounding atmosphere reacts with nickel atoms, resulting in a decrease of the oxidation rate of the material and in subsequent long-term stability of the device. Finally, possible reaction paths for the detection of NO2 are given by charge transfer analyses, occurring at the surface during the adsorption of oxygen molecules and the interaction with the target gas.
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Affiliation(s)
- Soufiane Krik
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, 44122 Ferrara, Italy
- Sensing
Technologies Lab, Faculty of Science and Technology, Free University of Bozen-Bolzano, Piazza Università 1, 39100 Bolzano, Italy
| | - Matteo Valt
- MNF
− Micro Nano Facility Unit, Sensors and Devices Center, Bruno Kessler Foundation, Via Sommarive 18, 38123 Trento, Italy
| | - Andrea Gaiardo
- MNF
− Micro Nano Facility Unit, Sensors and Devices Center, Bruno Kessler Foundation, Via Sommarive 18, 38123 Trento, Italy
| | - Barbara Fabbri
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, 44122 Ferrara, Italy
| | - Elena Spagnoli
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, 44122 Ferrara, Italy
| | - Maria Caporali
- CNR
ICCOM − Italian National Council for Research-Institute for
the Chemistry of OrganoMetallic Compounds, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Cesare Malagù
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, 44122 Ferrara, Italy
| | - Pierluigi Bellutti
- MNF
− Micro Nano Facility Unit, Sensors and Devices Center, Bruno Kessler Foundation, Via Sommarive 18, 38123 Trento, Italy
| | - Vincenzo Guidi
- Department
of Physics and Earth Sciences, University
of Ferrara, Via G. Saragat 1/C, 44122 Ferrara, Italy
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