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Nematic phase is the most fundamental mesophase exhibited by most of the rod shaped anisotropic liquid crystalline molecules. Nematics are orientationally ordered fluids whose average orientation direction can be manipulated on application…

软凝聚态物质 · 物理学 2015-07-21 Jitendra Kumar , Raj K Gupta , Sandeep Kumar , V. Manjuladevi

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 study on the quantum transport properties of chemically functionalized metallic double-walled carbon nanotubes (DWNTs) with lengths reaching the micrometer scale. First-principles calculations evidence that, for coaxial tubes…

材料科学 · 物理学 2016-03-29 Alejandro Lopez-Bezanilla

Carboxylic functionalization (-COOH groups) of carbon nanotubes is known to improve their dispersion properties and increase the electrical conductivity of carbon-nanotube - polymer nanocomposites. We have studied experimentally the effects…

Carbon nanotube fibers are materials with an exceptional combination of properties, including higher toughness than carbon fibers, electrical conductivity above metals, large specific surface area (250 $\frac{m^2}{g}$) and high…

应用物理 · 物理学 2019-02-20 Belén Alemán , María Vila , Juan J. Vilatela

The electronic properties of boron-nitride nanoribbons (BNNRs) doped with a line of carbon atoms are investigated by using density functional calculations. Three different configurations are possible: the carbon atoms may replace a line of…

介观与纳米尺度物理 · 物理学 2015-06-04 J. Beheshtian , A. Sadeghi , M. Neek-Amal , K. H. Michel , F. M. Peeters

While it is well-known that electrode conductivity has a critical impact on rate-performance in battery electrodes, this relationship has been quantified only by computer simulations. Here we investigate the relationship between electrode…

We calculated the effects of structural distortions on the electronic structure of carbon nanotubes. The key modification of the electronic structure brought about by bending a nanotube involves an increased mixing of $\sigma$ and…

材料科学 · 物理学 2019-08-17 Alain Rochefort , Dennis R. Salahub , Phaedon Avouris

The paper aims at the development of a digital twin modelling the electrical conductivity of multi-wall carbon nanotube (MWCNT)/polymer nanocomposite. A comparative analysis is conducted for various formulations of boundary conditions in…

材料科学 · 物理学 2020-09-15 N. A. Gudkov , S. V. Lomov , I. S. Akhatov , S. G. Abaimov

A dilute suspension of carbon nanotubes (CNTs) in a nematic liquid crystal (LC) does not disturb the LC director. Due to a strong LC-CNT anchoring energy and structural symmetry matching, CNT long axis follows the director field, possessing…

介观与纳米尺度物理 · 物理学 2015-05-13 Rajratan Basu , Germano S. Iannacchione

Single walled carbon nanotubes (SWNT) have displayed a wealth of quantum transport phenomena thus far. Defect free, unperturbed SWNTs with wellbehaved or tunable metal contacts are important to probing the intrinsic electrical properties of…

介观与纳米尺度物理 · 物理学 2015-06-25 Jien Cao , Qian Wang , Hongjie Dai

Carbon nanotube (CNTs) networks embedded in polymer matrix have been extensively studied over the recent years as a flexible thermoelectric (TE) transport medium. However, their power factor has been largely limited by the relatively…

Carbon nanotubes (CNTs) are quasi-1D nanostructures that display both high thermal conductivity and intriguing low-dimensional phonon transport phenomena. In comparison to the advances made in the theoretical calculation of the lattice…

应用物理 · 物理学 2023-08-29 Qianru Jia , Yuanyuan Zhou , Xun Li , Lucas Lindsay , Li Shi

Electrostatic screening between carbon nanotubes (CNTs) in a small CNT bundle leads to a switching behavior induced by electric field perpendicular to the bundle axis. Using a first-principles method, we investigate the electronic…

介观与纳米尺度物理 · 物理学 2010-10-06 Gunn Kim , J. Bernholc , Young-Kyun Kwon

In the present study, we report a systematic study of doping/ admixing of carbon nanotubes (CNTs) in different concentrations in MgB2. The composite material corresponding to MgB2+ x at.%CNTs (35 at.% > x > 0 at.%) have been prepared by…

超导电性 · 物理学 2007-05-23 Chandra Shekhar , Rajiv Giri , S. K. Malik* , O N Srivastava

Research on conjugated polymers for thermoelectric applications has made tremendous progress in recent years, which is accompanied by surging interest in molecular doping as a means to achieve the high electrical conductivities that are…

We have characterized the conductivity of carbon nanotubes (CNT) fibers enriched in semiconducting species as a function of temperature and pulsed laser irradiation of 266 nm wavelength. While at high temperatures the response approaches an…

The electronic properties of multi-wall carbon nanotubes (MWNTs) have attracted much attention because they could lead to nano-sized electronic devices. Using chemical vapor deposition (CVD), MWNTs are produced in large quantities at a low…

材料科学 · 物理学 2007-05-23 Hisashi Kajiura , Anil Nandyala , Alexey Bezryadin

A very recent report claims that ambient-pressure high-temperature ($T_c$) superconductivity was found in boron-doped three-dimensional networks of carbon nanotubes (CNTs). Here, we systematically study the electron-phonon coupling (EPC) of…

超导电性 · 物理学 2025-11-07 Zhenfeng Ouyang , Jing Jiang , Jian-Feng Zhang , Miao Gao , Kai Liu , Zhong-Yi Lu

We have studied the energetics, electronic structure, optical excitation, and electron relaxation of dinitromethane molecules (CH$_{2}$N$_{2}$O$_{4}$) adsorbed on semiconducting carbon nanotubes (CNTs) of chiral index (n,0) (n=7, 10, 13,…

化学物理 · 物理学 2013-10-29 Iek-Heng Chu , Dmitri S. Kilin , Hai-Ping Cheng