Metallic one-dimensional heterostructure for gas molecule sensing

Abstract We have investigated a new metallic core–shell nanowire (NW) geometry of that could be obtained experimentally, that is silicon (Si) and germanium (Ge) NWs with cores constituted by group-10 elements palladium (Pd) and platinum (Pt). These NWs are optimized with two different diameters of 1...

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Autores principales:	Prabal Dev Bhuyan, Sanjeev K. Gupta, Rajeev Ahuja, P. N. Gajjar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/103011942d9f4a8cbc524b9b9c5959b3
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spelling	oai:doaj.org-article:103011942d9f4a8cbc524b9b9c5959b32021-12-02T14:12:45ZMetallic one-dimensional heterostructure for gas molecule sensing10.1038/s41598-020-79921-82045-2322https://doaj.org/article/103011942d9f4a8cbc524b9b9c5959b32021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79921-8https://doaj.org/toc/2045-2322Abstract We have investigated a new metallic core–shell nanowire (NW) geometry of that could be obtained experimentally, that is silicon (Si) and germanium (Ge) NWs with cores constituted by group-10 elements palladium (Pd) and platinum (Pt). These NWs are optimized with two different diameters of 1.5 Å and 2.5 Å. The nanowires having diameter of 1.5 Å show semi-metallic nature with GGA-PBE calculation and metallic nature while spin orbit interaction (SOC) is included. The quantum conductance of the NWs increases with the diameter of the nanowire. We have investigated current–voltage (IV) characteristics for the considered NWs. It has been found that current values in accordance with applied voltage show strong dependence on the diameter of the NWs. The optical study of the NWs shows that absorption co-efficient peak moves to lower energies; due to quantum confinement effect. Furthermore, we have extensively studied optical response of Pd and Pt based core–shell NWs in O2 and CO2 environment. Our study on Si and Ge based metallic core/shell NW show a comprehensive picture as possible electron connector in future nano-electronic devices as well as nano gas detector for detecting O2 gas.Prabal Dev BhuyanSanjeev K. GuptaRajeev AhujaP. N. GajjarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Prabal Dev Bhuyan Sanjeev K. Gupta Rajeev Ahuja P. N. Gajjar Metallic one-dimensional heterostructure for gas molecule sensing
description	Abstract We have investigated a new metallic core–shell nanowire (NW) geometry of that could be obtained experimentally, that is silicon (Si) and germanium (Ge) NWs with cores constituted by group-10 elements palladium (Pd) and platinum (Pt). These NWs are optimized with two different diameters of 1.5 Å and 2.5 Å. The nanowires having diameter of 1.5 Å show semi-metallic nature with GGA-PBE calculation and metallic nature while spin orbit interaction (SOC) is included. The quantum conductance of the NWs increases with the diameter of the nanowire. We have investigated current–voltage (IV) characteristics for the considered NWs. It has been found that current values in accordance with applied voltage show strong dependence on the diameter of the NWs. The optical study of the NWs shows that absorption co-efficient peak moves to lower energies; due to quantum confinement effect. Furthermore, we have extensively studied optical response of Pd and Pt based core–shell NWs in O2 and CO2 environment. Our study on Si and Ge based metallic core/shell NW show a comprehensive picture as possible electron connector in future nano-electronic devices as well as nano gas detector for detecting O2 gas.
format	article
author	Prabal Dev Bhuyan Sanjeev K. Gupta Rajeev Ahuja P. N. Gajjar
author_facet	Prabal Dev Bhuyan Sanjeev K. Gupta Rajeev Ahuja P. N. Gajjar
author_sort	Prabal Dev Bhuyan
title	Metallic one-dimensional heterostructure for gas molecule sensing
title_short	Metallic one-dimensional heterostructure for gas molecule sensing
title_full	Metallic one-dimensional heterostructure for gas molecule sensing
title_fullStr	Metallic one-dimensional heterostructure for gas molecule sensing
title_full_unstemmed	Metallic one-dimensional heterostructure for gas molecule sensing
title_sort	metallic one-dimensional heterostructure for gas molecule sensing
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/103011942d9f4a8cbc524b9b9c5959b3
work_keys_str_mv	AT prabaldevbhuyan metalliconedimensionalheterostructureforgasmoleculesensing AT sanjeevkgupta metalliconedimensionalheterostructureforgasmoleculesensing AT rajeevahuja metalliconedimensionalheterostructureforgasmoleculesensing AT pngajjar metalliconedimensionalheterostructureforgasmoleculesensing
_version_	1718391767858937856

Metallic one-dimensional heterostructure for gas molecule sensing

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