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Two-Dimensional Bismuthene Nanosheets for Selective Detection of Toxic Gases
Centre for Clean Energy and Nano Convergence, Hindustan Institute of Technology and Science, Chennai 603103, India.ORCID iD: 0000-0002-4783-5772
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.ORCID iD: 0000-0003-4879-2302
School of Aeronautical Sciences, Hindustan Institute of Technology and Science, Chennai 603103, India.ORCID iD: 0000-0003-2006-6202
Department of Physics, Konkuk University, Seoul 05029, Republic of Korea.ORCID iD: 0000-0001-7276-6636
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2022 (English)In: ACS Applied Nano Materials, E-ISSN 2574-0970, Vol. 5, no 2, p. 2984-2993Article in journal (Refereed) Published
Abstract [en]

An in-depth understanding of the practical sensing mechanism of two-dimensional (2D) materials is critically important for the design of efficient nanosensors toward environmentally toxic gases. Here, we have performed van der Waals-corrected density functional theory (DFT) simulations along with nonequilibrium Green’s function (NEGF) to investigate the structural, electronic, transport, thermodynamic, and gas-sensing properties of pristine and defect-crafted bismuthene (bBi) sheets toward sulfur- (H2S, SO2) and nitrogen-rich (NH3, NO2) toxic gases. It is revealed that the electrical conductivities of pristine and defective bBi sheets are altered upon the adsorption of incident gases, which have been verified through transport calculation coupled with the work function and electronic density of states. Our calculations disclose that bBi sheets show superior and selective gas-sensing performance toward NO2 molecules among the studied gases due to a significant charge redistribution and more potent adsorption energies. We find that the mono- and divacancy-induced bBi sheets have enhanced sensitivity because the adsorption behavior is driven by a considerable change in the electrostatic potential difference between the sheets and the gas molecules. We further performed statistical thermodynamic analysis to quantify the gas adsorption abilities at the practical temperature and pressures for the studied gas samples. This work divulges the higher sensitivity and selectivity of bBi sheets toward hazard toxins such as NO2 under practical sensing conditions of temperature and pressure.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2022. Vol. 5, no 2, p. 2984-2993
Keywords [en]
DFT, Green's function, adsorption, conductivity, transport, thermodynamic analysis
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-496211DOI: 10.1021/acsanm.2c00303ISI: 000757875700001OAI: oai:DiVA.org:uu-496211DiVA, id: diva2:1735201
Funder
Swedish Research Council, VR-2016-06014Swedish Research Council, VR-2020-04410Swedish National Infrastructure for Computing (SNIC)Available from: 2023-02-08 Created: 2023-02-08 Last updated: 2023-02-10Bibliographically approved
In thesis
1. GENOME2QUNOME: Interfacing Molecules with Nanomaterials
Open this publication in new window or tab >>GENOME2QUNOME: Interfacing Molecules with Nanomaterials
2023 (English)Doctoral thesis, comprehensive summary (Other academic) [Artistic work]
Abstract [en]

The advent of technological furtherance in the biomedical sector and the renaissance of interdisciplinary science enable us to comprehend human lifestyle, and diseases at molecular and nanoscale levels. Lacking a shared theoretical foundation and terminological lexicon between various scientific domains might impede efforts to incorporate biological principles into nanoscience. In retrospect, it's possible to draw some instructive learnings from the fact that the development of contemporary nanoscience and biology was the consequence of the convergence of fields that had previously been kept separate. 

In this Ph.D. thesis, I have given the catchy moniker “GENOME2QUNOME” (an acronym for "Genetic organization of multicellular organisms and their enzymatic reaction 2 Quantum nanostructured materials for energy scavenging applications"), encompassing a combinatorial approach using computational methodologies in biophysics and nano/materials science. Structure-property correlations, a unifying paradigm based on understanding how nanomaterials behave and what qualities they exhibit at the molecular and nanoscale levels, are now widely acknowledged and are critical in the incorporation of bioinspired materials into nanoscience. Therefore, a unified framework have been elucidated in this thesis for the study of nanoscale materials ranging from 0D to 3D that may be useful in combining various strategies that characterize this interdisciplinary approach. 

This thesis is also a part of broader interdisciplinary research strategy aimed at depicting electronic transport in the nanoscale regime, elucidating interface mechanisms for contact electrification, and understanding the complex architectures of nanomaterials. The central hypothesis of this thesis is concentrated on the behavioral transition from the nanoscale regime to macromolecules, which is fascinating in real world scenario but theoretically challenging to bring it in reality or practice. To bridge this gap, I have made an attempt by integrating a wide range of computational methods, ranging from density functional theory (DFT) for systems with few atoms to classical dynamics dealing with billions of atoms. 

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2023. p. 100
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 2240
Keywords
Electronic transport, Contact electrification, Nanomaterials, Zinc Oxide, Tetrapods, 2D-materials, Density functional theory, Non-equilibrium Green's function, Molecular docking, Molecular dynamics simulation
National Category
Condensed Matter Physics Biophysics
Research subject
Materials Science; Theoretical Physics; Physics with specialization in Biophysics
Identifiers
urn:nbn:se:uu:diva-496330 (URN)978-91-513-1716-8 (ISBN)
Public defence
2023-03-31, Häggsalen, 10132, Ångström, Ångströmlaboratoriet Lägerhyddsvägen 1 752 37 Uppsala, Uppsala, 09:15 (English)
Opponent
Supervisors
Funder
Swedish Research Council, 2016-06014
Available from: 2023-03-07 Created: 2023-02-10 Last updated: 2025-02-20

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Panda, Pritam KumarAhuja, Rajeev

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