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Metallic one-dimensional heterostructure for gas molecule sensing
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- Bhuyan, Prabal Dev (author)
- St Xaviers Coll, Dept Phys & Elect, Computat Mat & Nanosci Grp, Ahmadabad 380009, Gujarat, India.;Gujarat Univ, Univ Sch Sci, Dept Phys, Ahmadabad 380009, Gujarat, India.
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- Gupta, Sanjeev K. (author)
- St Xaviers Coll, Dept Phys & Elect, Computat Mat & Nanosci Grp, Ahmadabad 380009, Gujarat, India.
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- Ahuja, Rajeev, 1965- (author)
- Uppsala universitet,KTH,Egenskaper,Uppsala Univ, Dept Phys & Astron, Condensed Matter Theory Grp, S-75120 Uppsala, Sweden.,Materialteori,Royal Inst Technol KTH, Dept Mat & Engn, Appl Mat Phys, S-10044 Stockholm, Sweden.
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- St Xaviers Coll, Dept Phys & Elect, Computat Mat & Nanosci Grp, Ahmadabad 380009, Gujarat, India;Gujarat Univ, Univ Sch Sci, Dept Phys, Ahmadabad 380009, Gujarat, India. St Xaviers Coll, Dept Phys & Elect, Computat Mat & Nanosci Grp, Ahmadabad 380009, Gujarat, India. (creator_code:org_t)
- 2021-01-11
- 2021
- English.
- In: Scientific Reports. - : Springer Nature. - 2045-2322. ; 11:1
- Journal article (peer-reviewed)
Abstract
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- 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 angstrom and 2.5 angstrom. The nanowires having diameter of 1.5 angstrom 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 O-2 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 O-2 gas.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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