Influence of Geometrical Parameters on the Transport Characteristics of Gated Core-Multishell Nanowires

Palutkiewicz, T.; Wołoszyn, M.; Wójcik, P.; Adamowski, J.; Spisak, B. J.

doi:10.12693/aphyspola.129.a-111

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…For this purpose, we solve the threedimensional Schrödinger-Poisson problem and we determine the current-voltage characteristics of the CMS-NW via the Landauer-Büttiker theory. In contrast to the previous report [4], the radius of the core and thicknesses of shells are much smaller, which follows recent examples of experimental research [3].…”

Section: Introductionsupporting

confidence: 56%

“…In the present study of a semiconductor CMS-NW we apply a theoretical model given in detail in our previous report [4], but with modified geometric parameters. The core and the outer shell of the nanowire are made of InGaAs, with the InP inner shell placed between them.…”

Section: Methods Of Calculationsmentioning

confidence: 99%

“…This allows to construct the vertical transistor with all-around gate on the basis of the considered nanostructures [3]. However, the properties of such nanodevices strongly depend on materials and the geometric parameters, as we have shown in our previous report where we have investigated the influence of the gate voltage on the coherent propagation of the conduction electrons through the CMS-NW [4].…”

Section: Introductionmentioning

confidence: 99%

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Transport Characteristics of Gated Core-Multishell Nanowires: Self-Consistent Approach

et al. 2016

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The influence of the applied gate voltage on the coherent propagation of the conduction electrons through the InGaAs/InP core-multishell nanowires with the surrounding gate is considered. The solution of the threedimensional Schrödinger equation within the effective mass approximation is found using the adiabatic method. The electrostatic potential distribution generated by the all-around gate is determined from the self-consistent procedure applied to the Schrödinger-Poisson problem. The Landauer-Büttiker formalism and quantum transmission boundary method are applied to calculate the transport properties of the considered nanosystem.

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Section: Introductionsupporting

confidence: 56%

Section: Methods Of Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transport Characteristics of Gated Core-Multishell Nanowires: Self-Consistent Approach

et al. 2016

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“…As examples, there are relatively few reports, centered on creating viable core@shell architectures, incorporating either 2D nanosheets or complex 3D hierarchical motifs. 43 Moreover, from a theoretical perspective, reports have surfaced on the influence and effects of shell strain and geometric parameters (such as shell thickness) on the valence band structure and transport properties of not only semiconducting III−V systems 44 but also related alloyed materials. 45 The dependence of the effective gap on variables, such as the core radius and NW shell identity, has been postulated within semiconducting core−shell NWs.…”

Section: Summary and Future Directionsmentioning

confidence: 99%

Exploring Strategies toward Synthetic Precision Control within Core–Shell Nanowires

Salvatore

Wong

2021

Acc. Chem. Res.

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Metrics & MoreArticle Recommendations CONSPECTUS: Achieving precision and reproducibility in terms of physical structure and chemical composition within arbitrary nanoscale systems remains a "holy grail" challenge for nanochemistry. Because nanomaterials possess fundamentally distinctive size-dependent electronic, optical, and magnetic properties with wide-ranging applicability, the ability to produce homogeneous and monodisperse nanostructures with precise size and shape control, while maintaining a high degree of sample quality, purity, and crystallinity, remains a key synthetic objective. Moreover, it is anticipated that the methodologies developed to address this challenge ought to be reasonably simple, scalable, mild, nontoxic, high-yield, and cost-effective, while minimizing reagent use, reaction steps, byproduct generation, and energy consumption. The focus of this Account revolves around the study of various types of nanoscale onedimensional core−shell motifs, prepared by our group. These offer a compact structural design, characterized by atom economy, to bring together two chemically distinctive (and potentially sharply contrasting) material systems into contact within the structural context of an extended, anisotropic configuration. Herein, we describe complementary strategies aimed at resolving the aforementioned concerns about precise structure and compositional control through the infusion of careful "quantification" and systematicity into customized, reasonably sustainable nanoscale synthetic protocols, developed by our group. Our multipronged approach involved the application of (a) electrodeposition, (b) electrospinning, (c) a combination of underpotential deposition and galvanic displacement reactions, and (d) microwave-assisted chemistry to diverse core−shell model systems, such as (i) carbon nanotube−SiO 2 composites, (ii) SnO 2 /TiO 2 motifs, (iii) ultrathin Pt-monolayer shell-coated alloyed metal core nanowires, and (iv) Cu@TiO 2 nanowires, for applications spanning optoelectronics, photocatalysis, electrocatalysis, and thermal CO 2 hydrogenation, respectively. In so doing, over the years, we have reported on a number of different characterization tools involving spectroscopy (e.g., extended X-ray absorption fine structure (EXAFS) spectroscopy) and microscopy (e.g., high-resolution transmission electron microscopy (HRTEM) and atomic force microscopy (AFM)) for gaining valuable insights into the qualitative and quantitative nature of not only the inner core and outer shell themselves but also their intervening interface. While probing the functional catalytic behavior of a few of these core−shell structures under realistic operando conditions, using dynamic, in situ characterization techniques, we found that local and subtle changes in chemical composition and physical structure often occur during the reaction process itself. As such, nuanced differences in atomic packing, facet exposure, degree of derivatization, defect content, and/or extent of crystallinity can impact upon observed propert...

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Simulations of Transport Characteristics of Core-Shell Nanowire Transistors with Electrostatic All-Around Gate

Palutkiewicz

Wołoszyn

Spisak

2017

Advances in Intelligent Systems and Computing

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Influence of Geometrical Parameters on the Transport Characteristics of Gated Core-Multishell Nanowires

Abstract: Calculations of the current-voltage characteristics of the core-multishell nanowires for different radii of the core and various thicknesses of the shells are presented. A role of the conducting core and shells in the coherent transport under the influence of the gate voltage is discussed.

Cited by 3 publications

References 6 publications

Transport Characteristics of Gated Core-Multishell Nanowires: Self-Consistent Approach

Transport Characteristics of Gated Core-Multishell Nanowires: Self-Consistent Approach

Exploring Strategies toward Synthetic Precision Control within Core–Shell Nanowires

Simulations of Transport Characteristics of Core-Shell Nanowire Transistors with Electrostatic All-Around Gate

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