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We report that entirely end-bonded multi-walled carbon nanotubes (MWNTs) can show superconductivity with the transition temperature Tc as high as 12K that is approximately 40-times larger than those reported in ropes of single-walled…

Superconductivity · Physics 2009-11-11 I. Takesue , J. Haruyama , N. Kobayashi , S. Chiashi , S. Maruyama , T. Sugai , H. Shinohara

We performed first principles calculations on work functions of single wall carbon nanotubes (SWNTs), which can be divided into two classes according to tube diameter (D). For class I tubes (D > 1 nm), work functions lie within a narrow…

Materials Science · Physics 2009-11-11 Bin Shan , Kyeongjae Cho

Carbon nanotube (CNT) wires approach copper's specific conductivity and surpass carbon fiber's strength, with further improvement anticipated with greater aspect ratios and incorporation of dopants with long-range structural order.…

A method is introduced to isolate and measure the electrical transport properties of individual single-walled carbon nanotubes (SWNTs) aligned on an ST-cut quartz, from room temperature down to 2 K. The diameter and chirality of the…

Mesoscale and Nanoscale Physics · Physics 2014-08-26 Tohru Watanabe , El-Hadi S. Sadki , Takahide Yamaguchi , Yoshihiko Takano

We investigate quantum transport in aligned carbon nanotube (CNT) fibers fabricated via solution spinning, focusing on the roles of structural dimensionality and quantum interference effects. The fibers exhibit metallic behavior at high…

Single-wall carbon nanotubes (SWNTs) are best known in their hollow cylindrical shapes, but the ground state of large-diameter tubes actually corresponds to a collapsed dumbbell-like structure, where the opposite sides of the nanotube wall…

Mesoscale and Nanoscale Physics · Physics 2019-12-20 Rafael R. Del Grande , Alexandre F. da Fonseca , Rodrigo B. Capaz

Carbon Nanotube (CNT) is one of the most significant materials for the development of faster and improved performance of nano-scaled transistors. This paper aims at analyzing a trade-off between device performance and device size of CNT…

Applied Physics · Physics 2018-11-20 Imtiaj Khan , Ovishek Morshed , Sharif Mohammad Mominuzzaman

The rapid progress on MgB2 superconductor since its discovery[1] has made this material a strong competitor to low and high temperature superconductors (HTS) for applications with a great potential to catch the niche market such as in…

Transparent and conductive films (TCFs) are of great technological importance. The high transmittance, electrical conductivity and mechanical strength make single-walled carbon nanotubes (SWCNTs) a good candidate for their raw material.…

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…

Materials Science · Physics 2010-01-12 Qing Cao , Minggang Xia , Coskun Kocabas , Moonsub Shim , John A. Rogers , Slava V. Rotkin

In most envisioned applications, full utilization of a graphene-carbon nanotube (CNT) construct requires maintaining the integrity of the graphene layer during the CNT growth step. In this work, we exhibit an approach towards controlled CNT…

Materials Science · Physics 2013-08-13 Kitu Kumar , Youn-Su Kim , Xin Li , Junjun Ding , Frank T. Fisher , Eui-Hyeok Yang

The mechanism of the selective dispersion of single-walled carbon nanotubes (CNTs) by polyfluorene polymers is studied in this paper. Using extensive molecular dynamics simulations, it is demonstrated that diameter selectivity is the result…

Materials Science · Physics 2015-09-02 Hongliu Yang , Viktor Bezugly , Jens Kunstmann , Arianna Filoramo , Gianaurelio Cuniberti

Transformation of carbon dioxide into carbon nanotubes, CNTs, by electrolysis in molten carbonates provides a low cost route to extract and store this greenhouse gas. CNTs are more stable, compact and valuable than fuels or other CO2…

Materials Science · Physics 2016-07-11 Stuart Licht , Matthew Lefler , Jiawen Ren , Juan Vicini

Bias-induced light emission and thermal radiation from conducting channels of carbon nanotubes (CNTs) with defects are studied theoretically within the framework of nonequilibrium Green's function method based on a tight-binding model.…

Mesoscale and Nanoscale Physics · Physics 2021-08-25 Zhang Zu-Quan , Wang Jian-Sheng

Channeling of high-energy particles in straight and bent multi-wall nanotubes (MWNT) has been studied in computer simulations and compared to the channeling properties of single-wall nanotubes (SWNT) and bent crystal lattices. It is…

Accelerator Physics · Physics 2009-11-11 S. Bellucci , V. M. Biryukov , A. Cordelli

Carbon nanotubes (CNT) have been recently proposed as stabilizers against grain growth that can happen even at low temperature inputs in nano-crystalline and ultrafine-grained materials obtained by severe plastic deformation. In this study,…

Carbon nanotubes (CNTs) are stiff, all-carbon macromolecules with diameters as small as one nanometer and few microns long. Solutions of CNTs in chlorosulfonic acid (CSA) follow the phase behavior of rigid rod polymers interacting via a…

Interface widely exists in carbon nanotube (CNT) assembly materials, taking place at different length scales. It determines severely the mechanical properties of these assembly materials. Here I assess the mechanical properties of…

Materials Science · Physics 2017-06-02 Xiaohua Zhang

Physisorption studies and transmission electron microscopy have been used to characterise multi-walled carbon nanotubes (MWNTs) made by a template-synthesis technique. Microscopic investigations revealed formation of 'branched nanotubes'…

Chemical Physics · Physics 2023-05-10 M. -R. Babaa , E. Mcrae , Sandrine Delpeux , J. Ghanbaja , F. Valsaque , F. Béguin

Carbon nanotubes (CNTs) are currently considered a successor to silicon in future nanoelectronic devices. To realize this, controlled growth of defect-free nanotubes is required. Until now, the understanding of atomic-scale CNT growth…

Materials Science · Physics 2023-03-16 Daniel Hedman , Ben McLean , Christophe Bichara , Shigeo Maruyama , J. Andreas Larsson , Feng Ding