Quantum electron transport in toroidal carbon nanotubes with metallic leads

Jack, M.; Encinosa, M.

doi:10.1080/08927020801930547

Cited by 8 publications

(4 citation statements)

References 56 publications

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“…11 12 Toroidal carbon nanostructures or carbon nanotori, could play interesting roles in nanoscale device applications in areas such as nanoelectronics, quantum computing and biosensors. 13 14 In addition, these structures could have potential applications in diverse fields such as quantum electronic transport 15 and hydrogen storage materials. 16 Future studies are needed to explain these properties.…”

Section: Introductionmentioning

confidence: 99%

Electrochemistry, Reactivity and Selectivity of Toroidal C₁₂₀ Nanostructure: A Density Functional Theory Study

López-Chávez¹,

Muñoz-Vega²,

Castillo-Alvarado³

et al. 2012

j comput theor nanosci

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Although new forms of toroidal carbon nanostructures have already been proposed by researchers around the world, many physical and chemical properties are still not clearly understood. A further study of its properties is still necessary. In this work, what we done it, by methods based on density functional theory, electrochemistry, reactivity and selectivity of the C 120 nanotori cluster. We have studied it as an isolated molecular species using the GGA PW91 functional. Electron Affinity (EA) and Ionization Potential (IP) were calculated in order to study its electrochemistry. The chemical reactivity was characterized by global indicators such as, chemical potential, chemical hardness, and chemical electrophilicity index and selectivity descriptors such as Fukui indices. Since this issue has not yet been studied neither reported by others authors, the results provided us new physical insight so that they will be useful for the scientific community. The results suggest that C 120 nanotorus and C 60 fullerene roughly share the same global chemical reactivity. On the other hand, our results revealed an electrophilic reaction. The reaction will take place, preferably, at sites, of the C 120 nanotorus, localized in zones of its inner radius. Likewise, for a nucleophilic reaction, the preferred sites are localized at zones of outer radius. Negative values for Fukui functions were also obtained. However, they are found only in heptagonal rings of the molecule C 120 , where atoms tend to come very close to each other. That confirms results previously found by other authors on different organic molecules.

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Section: Introductionmentioning

confidence: 99%

Electrochemistry, Reactivity and Selectivity of Toroidal C₁₂₀ Nanostructure: A Density Functional Theory Study

López-Chávez¹,

Muñoz-Vega²,

Castillo-Alvarado³

et al. 2012

j comput theor nanosci

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“…An important geometry intensively studied in the last years is the torus surface. Curvature effects plays an important role in toroidal geometry [20]. Toroidal carbon nanotubes, also known as carbon nanotori, appears in nanoelectronics, quantum computing, and biosensors [21,22].…”

Section: Introductionmentioning

confidence: 99%

Pseudo-Hermitian Dirac operator on the torus for massless fermions under the action of external fields

Yeşiltaş,

Furtado

2021

Preprint

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The Dirac equation in (2 + 1) dimensions on the toroidal surface is studied for a massless fermion particle under the action of external fields. Using the covariant approach based in general relativity, the Dirac operator stemming from a metric related to the strain tensor is discussed within the Pseudo-Hermitian operator theory. Furthermore, analytical solutions are obtained for two cases, namely, constant and positiondependent Fermi velocity.

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“…Many studies have been conducted to investigate the structural models of tori CNTs to investigate their thermodynamic stabilities. The work of Ihara et al showed that the tori CNTs are found to be more stable than the C 60 fullerene, comparing the cohesive energies. ,− Additionally, many numerical simulations have demonstrated that the toroidal SWNTs (TSNs) exhibit quantum interference effect in charge transport under an external magnetic field or electromagnetic field, along their potential use as a macroscopic molecular toroid/coil with the molecular Aharonov–Bohm oscillator, spin-polarized current injector, detection of biopolymers, and metal–insulator transition switching. − Recently, gold nanoparticles (Au NPs) were deposited on CNT rings for theragnostic applications . Nevertheless, the experimental studies and applications of TSNs have been dilatory as the theoretical investigations .…”

Section: Introductionmentioning

confidence: 99%

Efficient Toroidal Formation of Sorted Metallic and Semiconducting Single-Walled Carbon Nanotubes via General Pickering Emulsion

Khalid

Yoo

et al. 2020

ACS Omega

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Single-walled carbon nanotubes (SWNTs) with a toroidal/coiled geometry-shaped structure sustain innovative preference to future technology material. The toroidal shape can be used in designing nanoelectronic devices for various prospective applications such as tactile sensors, electromagnetic absorbers, and energy storage devices. In this study, we demonstrate the fabrication of toroidal geometry shapes of metallic (m-) and semiconducting (s-) SWNTs, which can be revealed by simply mixing a few solutions in the correct ratio, both oil-in-water (hydrophobic) and water-in-oil (hydrophilic) emulsion processes. Herein, the letter communicates the formation of pure m- and s-SWNTs (metallic and semiconducting) by annular, obtained from gel column chromatography, via the emulsion approach. We have also studied the surfactant sodium dodecyl sulfate removal of sorted species from a gel column by a simple method named as chloroform/methanol/water extraction.

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Quantum electron transport in toroidal carbon nanotubes with metallic leads

Cited by 8 publications

References 56 publications

Electrochemistry, Reactivity and Selectivity of Toroidal C₁₂₀ Nanostructure: A Density Functional Theory Study

Electrochemistry, Reactivity and Selectivity of Toroidal C₁₂₀ Nanostructure: A Density Functional Theory Study

Pseudo-Hermitian Dirac operator on the torus for massless fermions under the action of external fields

Efficient Toroidal Formation of Sorted Metallic and Semiconducting Single-Walled Carbon Nanotubes via General Pickering Emulsion

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Quantum electron transport in toroidal carbon nanotubes with metallic leads

Cited by 8 publications

References 56 publications

Electrochemistry, Reactivity and Selectivity of Toroidal C120 Nanostructure: A Density Functional Theory Study

Electrochemistry, Reactivity and Selectivity of Toroidal C120 Nanostructure: A Density Functional Theory Study

Pseudo-Hermitian Dirac operator on the torus for massless fermions under the action of external fields

Efficient Toroidal Formation of Sorted Metallic and Semiconducting Single-Walled Carbon Nanotubes via General Pickering Emulsion

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Electrochemistry, Reactivity and Selectivity of Toroidal C₁₂₀ Nanostructure: A Density Functional Theory Study

Electrochemistry, Reactivity and Selectivity of Toroidal C₁₂₀ Nanostructure: A Density Functional Theory Study