Electron transport through double-walled carbon nanotube quantum dots

Srivastava, Saurabh; Mishra, Brijesh Kumar

doi:10.1007/s11051-018-4398-9

Cited by 4 publications

(2 citation statements)

References 54 publications

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“…However, a detailed analysis of DOS in the band gap of the semiconductor tube (due to the presence of a metallic tube) was not investigated by them. It is to be noted that the semiconductor tube utilized in their study is of chiral type, whereas Srivastava et al have considered zigzag systems. In our study we have considered two possibilities (labels C and D) and we have predicted a metallic nature for both.…”

Section: Resultsmentioning

confidence: 99%

“…Both approaches appeared to be in reasonable agreement and allowed to predict the behavior of DWCNT of different sizes. Srivastava and Mishra performed a theoretical study based on the extended Huckel molecular orbital (EHMO) semi‐empirical approximation on a series of DWCNT systems, to elucidate the electron transport through the DWCNT interphase. The configurations used for the study included semiconductor (S) inside a metallic (M) (S@M), metallic inside a semiconductor (M@S), and semiconductor inside a semiconductor (S@S).…”

Section: Introductionmentioning

confidence: 99%

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Theoretical study on the electronic structure nature of single and double walled carbon nanotubes and its role on the electron transport

Espinosa‐Torres

Guillén‐López

Martínez-Juárez

et al. 2019

Int J of Quantum Chemistry

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Density functional theory and molecular dynamics (MD) calculations were used to evaluate electronic structure properties in a series of nanotubes with smallest possible diameters (both types: armchair and zigzag), and the corresponding chiral nanotubes (8,m) for 0 ≤ m ≤ 8. The calculations were performed considering a length of 16.5 Å. We evaluated a set of 26 combinations of dual nanotubes (armchair/armchair, zigzag/zigzag, armchair/zigzag, and zigzag/armchair), where the first label corresponds to the outer tube. We extended our study with nine additional systems of double-walled carbon nanotubes (DWCNT) with semiconductor nature. In this regard, we gave insight into the semiconductive or metallic nature inherited to the dual tubes. DWCNT systems were possible to construct by maintaining a radial distance of 3.392 Å for the armchair/armchair arrangement and 3.526 Å for the zigzag/zigzag type. It was considered as a reference, the interplanar distance of graphite (3.350 Å). Electronic transport calculations were also performed on selected DWCNT systems in order to understand the role played by the different symmetries under study. It was evidenced that the electronic structure nature of the systems rules the ability to transport electrons through the DWCNT interface. K E Y W O R D S DFT, DWCNT, electron transmission, energy storage, molecular dynamics 1 | INTRODUCTION Although some experimental efforts have been performed to understand the influence of shells in the electronic structure and electronic transport properties of double-walled carbon nanotubes (DWCNT), a systematic theoretical study to elucidate the relations among the morphology of the single-walled carbon nanotubes (SWCNT) components of DWCNT systems and the electronic transport through the assembled shells are not available in open literature.The study of SWCNT and multi-walled carbon nanotubes (MWCNT) has experienced an outstanding growth in the last decades as possible candidates for a wide range of applications due to their unique electrical, mechanical, and thermal properties. The electronic properties of carbon nanotubes (CNT) are remarkable and they have received great attention. For instance, due to the quantum confinement of the electrons in the circumferential direction, a SWCNT can be either metallic or semiconducting, depending on its geometry, which strongly depends on its chiral

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical study on the electronic structure nature of single and double walled carbon nanotubes and its role on the electron transport

Espinosa‐Torres

Guillén‐López

Martínez-Juárez

et al. 2019

Int J of Quantum Chemistry

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Oil/water separation and functionality of smart carbon nanotube–titania nanotube composite

et al. 2022

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Water treatment applications are in high demand recently. In this work, the titania nanotube (TNT) was successfully grown onto the outer surface of the carbon nanotubes (CNTs) via the hydrothermal method. The resultant prepared composite was doped with different ratios of nitrogen. The structural and morphological merits of the composites displayed the successful composition of the matrices, as well as the particle size of the composite within the nanoscale. The optical specifications of the composites demonstrate successful direct and indirect transitions with a high energy gap (> 3 eV). The testing of different oils in the water/oil separation exhibited a high rate of success to split oil and water (> 95%). In this regard, CNT-TNT 1.0 sample reflects the highest efficiency. Compared to other researchers that demonstrate the highest efficiency of their proposed structure, our membrane offers a decent separation efficiency. The proposed composite might provide a feasible and cost-effective method for water/oil separation application in the nanotechnological fields. Graphical abstract

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A cucurbit[6]uril-based carbon dot for recognizing metal ions and anions in solutions

Yuan,

Yu,

et al. 2024

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Electron transport through double-walled carbon nanotube quantum dots

Cited by 4 publications

References 54 publications

Theoretical study on the electronic structure nature of single and double walled carbon nanotubes and its role on the electron transport

Theoretical study on the electronic structure nature of single and double walled carbon nanotubes and its role on the electron transport

Oil/water separation and functionality of smart carbon nanotube–titania nanotube composite

A cucurbit[6]uril-based carbon dot for recognizing metal ions and anions in solutions

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