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We investigate how the dynamic polarization of the carbon atoms valence electrons affects the spatial distributions of protons channeled in the (11, 9) single-wall carbon nanotubes placed in vacuum and embedded in various dielectric media.…

原子物理 · 物理学 2009-11-13 D. Borka , D. J. Mowbray , Z. L. Mišković , S. Petrović , N. Nešković

We report the transmission over a wide frequency range (far infrared - visible) of pristine and hole-doped, free-standing carbon nanotube films at temperatures between 50 K and 300 K. Optical constants are estimated by Kramers-Kronig…

材料科学 · 物理学 2013-05-29 F. Borondics , K. Kamaras , M. Nikolou , D. B. Tanner , Z. H. Chen , A. G. Rinzler

Gases adsorbed within bundles of carbon nanotubes (inside of the nanotubes or in the interstitial channels between the tubes) exhibit a variety of phase transitions with the help of interactions between molecules in neighboring channels or…

软凝聚态物质 · 物理学 2007-05-23 Silvina M. Gatica , M. Mercedes Calbi , Milton W. Cole

The B-doped monatomic carbon chain has fine molecular capture ability to H2O and especially to NO2, better than other doped monatomic carbon chains.At 300 K and 1 atm, the capture probability of the B-doped monatomic carbon chain is…

介观与纳米尺度物理 · 物理学 2013-11-12 Zheng-Zhe Lin , Xi Chen

Deformations of single-wall carbon nanotubes are investigated within the tight-binding model with deformation-dependent hopping energies. We show that the nanotubes tend to twist and shrink spontaneously at zero temperature. The explicit…

介观与纳米尺度物理 · 物理学 2017-07-05 Vít Jakubský , Axel Pérez-Obiol

We present simulations of particle beam channeling in carbon nanotubes and evaluate the possibilities for experimental observation of channeling effect in straight and bent nanotubes at IHEP and LNF. Different particle species are…

加速器物理 · 物理学 2008-11-26 S. Bellucci , V. M. Biryukov , Yu. A. Chesnokov , V. Guidi , W. Scandale

Multiwalled carbon nanotubes are shown to be ballistic conductors at room temperature, with mean free paths of the order of tens of microns. These experiments follow and extend the original experiments by Frank et al (Science, 280 1744…

材料科学 · 物理学 2007-05-23 Philippe Poncharal , Claire Berger , Yan Yi , Z. L. Wang , Walt A. de Heer

A complex approach phonon quantum discrete model (PQDM) was developed to describe dynamics, kinetics and statistics of phonons in carbon nanostructures with zero-chirality of both zig-zag and armchair geometry. The model allows include into…

介观与纳米尺度物理 · 物理学 2007-05-23 E. Ya. Glushko , V. N. Evteev , M. V. Moiseenko , N. A. Slusarenko , A. A. Zakhidov

Recently Zheng and Jiang [PRL 88, 045503 (2002)], based on static models, have proposed that multiwalled carbon nanotubes could be the basis for a new generation of nanooscilators in the several gigahertz range. In this work we present the…

材料科学 · 物理学 2009-11-07 S. B. Legoas , V. R. Coluci , S. F. Braga , P. Z. Coura , S. O. Dantas , D. S. Galvao

Current-voltage characteristics of suspended single-wall carbon nanotube quantum dots show a series of steps equally spaced in voltage. The energy scale of this harmonic, low-energy excitation spectrum is consistent with that of the…

介观与纳米尺度物理 · 物理学 2007-05-23 S. Sapmaz , P. Jarillo-Herrero , Ya. M. Blanter , C. Dekker , H. S. J. van der Zant

We study a ferromagnetic suspension or a suspension of magnetic nanoparticles in an anisotropic nematic medium, in three different one-dimensional variational settings, ordered in terms of increasing complexity. The three models are…

软凝聚态物质 · 物理学 2019-07-17 Konark Bisht , Varsha Banerjee , Paul Milewski , Apala Majumdar

Experiments and computer simulations demonstrate that water spontaneously fills the hydrophobic cavity of a carbon nanotube. To gain a quantitative thermody- namic understanding of this phenomenon, we use the recently developed Two Phase…

介观与纳米尺度物理 · 物理学 2011-08-22 Hemant Kumar , Biswaroop Mukherjee , Shiang-Tai Lin Chandan Dasgupta , A. K. Sood , Prabal K. Maiti

We present Monte Carlo simulations of a coarse-grained model for Langmuir monolayers of amphiphile molecules on a polar substrate. The molecules are modelled as chains of Lennard-Jones beads, with one slightly larger end bead confined in a…

软凝聚态物质 · 物理学 2009-10-31 Christoph Stadler , Harald Lange , Friederike Schmid

Heat conduction of a real quasi-one dimensional material, the finite length carbon nanowire (CNW), inserted into the single-walled carbon nanotube (SWNT) has been studied by the molecular dynamical (MD) method, in which both of the…

介观与纳米尺度物理 · 物理学 2007-07-31 Gang Wu , Jinming Dong

The configurations of the molecules nearest to a single vacancy in solid CO2 were studied by the Metropolis Monte Carlo (MC) simulation at temperatures T = 0, 100, and 200 K. It was found that distorted orientational configurations at T = 0…

材料科学 · 物理学 2018-09-13 Koji Kobashi

Combining equilibrium and non-equilibrium molecular dynamics simulations with accurate carbon potentials, we determine the thermal conductivity $\lambda$ of carbon nanotubes and its dependence on temperature. Our results suggest an…

材料科学 · 物理学 2009-10-31 Savas Berber , Young-Kyun Kwon , David Tomanek

The objective of the present paper is to investigate the mechanical properties of carbon nanotubes. We use classical molecular dynamics simulation in order to study the effect of external compression, bending and torsion to nanotubes. We…

介观与纳米尺度物理 · 物理学 2014-11-27 N. Stefanakis

Three typical one-dimensional (1D)/quasi-1D nanocarbons, linear carbon chains, carbon nanotubes, and graphene nanoribbons have been proven to grow inside single-wall carbon nanotubes. This gives rise to three types of hybrid materials whose…

材料科学 · 物理学 2021-01-29 Weili Cui , Takeshi Saito , Paola Ayala , Thomas Pichler , Lei Shi

Carbon nanotubes are one-dimensional and very narrow. These obvious facts imply that under doping with boron and nitrogen, microscopic doping inhomogeneity is much more important than for bulk semiconductors. We consider the possibility of…

材料科学 · 物理学 2009-11-07 Paul E. Lammert , Vincent H. Crespi , Angel Rubio

A finite-dimensional chemistry model with two two-level artificial atoms on quantum dots positioned in optical cavities, called the association-dissociation model of neutral hydrogen molecule, is described. The initial circumstances that…

量子物理 · 物理学 2024-06-08 Hui-hui Miao , Ozhigov Yuri Igorevich