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The intrinsic mechanical strength of single-walled carbon nanotubes (SWNTs) within the diameter range of 0.3-0.8 nm has been studied based on ab initio density functional theory calculations. In contrast to predicting "smaller is stronger…

材料科学 · 物理学 2016-01-06 Nguyen Tuan Hung , Do Van Truong , Vuong Van Thanh , Riichiro Saito

The controlled introduction of covalent sp$^{3}$ defects into semiconducting single-walled carbon nanotubes (SWCNTs) gives rise to exciton localization and red-shifted near-infrared luminescence. The single-photon emission characteristics…

材料科学 · 物理学 2022-06-22 Wenhao Zheng , Nicolas F. Zorn , Mischa Bonn , Jana Zaumseil , Hai I. Wang

We calculate the diameter and chirality dependences of the binding energies, sizes, and bright-dark splittings of excitons in semiconducting single-wall carbon nanotubes (SWNTs). Using results and insights from {\it ab initio} calculations,…

材料科学 · 物理学 2009-11-11 Rodrigo B. Capaz , Catalin D. Spataru , Sohrab Ismail-Beigi , Steven G. Louie

The electrostatic coupling between singled-walled carbon nanotube (SWNT) networks/arrays and planar gate electrodes in thin-film transistors (TFTs) is analyzed both in the quantum limit with an analytical model and in the classical limit…

材料科学 · 物理学 2010-01-12 Qing Cao , Minggang Xia , Coskun Kocabas , Moonsub Shim , John A. Rogers , Slava V. Rotkin

Recently experiments showed that nodal structural defects are readily formed in the synthesis of single-walled carbon nanotubes (SWNTs) and consequently, SWNTs are likely to deviate from well-defined seamless tubular structures. Here, using…

介观与纳米尺度物理 · 物理学 2014-10-02 Young I. Jhon , Woonjo Cho , Seok Lee , Young Min Jhon

This work represents the first electro-thermal study of metallic single-wall carbon nanotubes (SWNTs) for interconnect applications. Experimental data and careful modeling reveal that self-heating is of significance in short (1 < L < 10 um)…

介观与纳米尺度物理 · 物理学 2016-11-15 Eric Pop , David Mann , John Reifenberg , Kenneth Goodson , Hongjie Dai

An elongation method based on ab initio quantum chemistry approaches is presented. It allows to study electronic structures and coherent electron transportation properties of single-walled carbon nanotubes (SWCNTs) up to 22nm in length…

材料科学 · 物理学 2007-05-23 Jun Jiang , Wei Lu , Yi Luo

We present new data and a compact mobility model for single-wall carbon nanotubes, with only two adjustable parameters, the elastic and inelastic collision mean free paths at 300 K. The mobility increases with diameter, decreases with…

介观与纳米尺度物理 · 物理学 2010-03-23 Y. Zhao , A. Liao , E. Pop

Single-wall carbon nanotube (SWNT) nanofibrils were assembled onto a variety of conductive scanning probes including atomic force microscope (AFM) tips and scanning tunnelling microscope (STM) needles using positive dielectrophoresis (DEP).…

材料科学 · 物理学 2011-06-21 Haoyan Wei , Anna Craig , Bryan D Huey , Fotios Papadimitrakopoulos , Harris Marcus

Recent conductance measurements on multi-wall carbon nanotubes (CNTs) reveal an effective behavior similar to disordered single-wall CNTs. This is due to the fact that electric current flows essentially through the outermost shell and is…

介观与纳米尺度物理 · 物理学 2009-11-11 S. Krompiewski , N. Nemec , G. Cuniberti

We present a multispectroscopic structural study of various nanotube samples with different tube diameters. We determine for each sample the mean bundle and tube diameter as well as the tube diameter distribution. The possibility to work on…

其他凝聚态物理 · 物理学 2007-05-23 Nicolas Izard , Didier Riehl , Eric Anglaret

The electrical characteristics of a carbon nanotube can be significantly modified by applying elastic strain. This study focuses on exploring this phenomenon in a single-walled carbon nanotube (SWNT) using tight-binding transport…

介观与纳米尺度物理 · 物理学 2024-09-10 Naif Hadadi , Adel Belayadi , Ousmane Ly , Adel Abbout

The temperature dependence of optical excitation life-time, Gamma, and transition energies, E_ii, were measured for bucky-papers of single-wall carbon nanotubes (SWCNTs) and inner tubes in double-wall carbon nanotubes (DWCNTs) using…

材料科学 · 物理学 2009-11-11 Ferenc Simon , Rudolf Pfeiffer , Hans Kuzmany

We apply first principles calculations to study the opening of single-wall carbon nanotubes (SWNT's) by oxidation. We show that an oxygen rim can stabilize the edge of the open tube. The sublimation of CO$_2$ molecules from the rim with the…

Carbon nanotubes are quantum sources whose emission can be tuned at telecommunication wavelengths by choosing the diameter appropriately. Most applications require the smallest possible linewidth. Therefore, the study of the underlying…

Effect of contact interfaces, between metallic single-wall carbon nanotubes (SWCNT) and external electrodes made also of nanotubes, on the electrical conductance is studied. A tight-binding model with both diagonal and off-diagonal…

介观与纳米尺度物理 · 物理学 2015-06-24 S. Krompiewski

This paper is the first one of a series of two articles in which we revisit the optical properties of single-walled carbon nanotubes (SWNT). Produced by rolling up a graphene sheet, SWNT owe their intriguing properties to their cylindrical…

数学物理 · 物理学 2018-11-30 Morten Rasmussen , Benjamin Ricaud , Baptiste Savoie

Single-walled carbon nanotubes (SWNTs) have been grown via chemical vapor deposition on high-kappa dielectric SrTiO3/Si substrates, and high-performance semiconducting SWNT field-effect transistors have been fabricated using the thin SrTiO3…

介观与纳米尺度物理 · 物理学 2007-12-05 B. M. Kim , T. Brintlinger , E. Cobas , Haimei Zheng , M. S. Fuhrer , Z. Yu , R. Droopad , J. Ramdani , K. Eisenbeiser

The search or design of silicon nanostructures similar to their carbon analogues has attracted great interest recently. In this work, density functional calculations are performed to systematically study a series of finite and infinite…

介观与纳米尺度物理 · 物理学 2011-07-19 Lingju Guo , Xiaohong Zheng , Chunsheng Liu , Wanghuai Zhou , Zhi Zeng

The thermoelectric properties of two typical SiGe nanotubes are investigated using a combination of density functional theory, Boltzmann transport theory, and molecular dynamics simulations. Unlike carbon nanotubes, these SiGe nanotubes…

材料科学 · 物理学 2015-02-24 J. Wei , H. J. Liu , X. J. Tan , L. Cheng , J. Zhang , D. D. Fan , J. Shi , X. F. Tang