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Graphene-based nanostructures exhibit a vast range of exciting electronic properties that are absent in extended graphene. For example, quantum confinement in carbon nanotubes and armchair graphene nanoribbons (AGNRs) leads to the opening…

Using density functional tight-binding method, we studied the mechanical properties, deformation and failure of armchair (AC) and zigzag (ZZ) phosphorene nanotubes (PNTs) with monovacancies and divacancies subjected to uniaxial tensile…

材料科学 · 物理学 2018-05-09 V. Sorkin , Y. W. Zhang

Recently unusual properties of water in single-walled carbon nanotubes (CNT) with diameters ranging from 1.05 nm to 1.52 nm were observed. It was found that water in the CNT remains in an ice-like phase even when the temperature ranges…

介观与纳米尺度物理 · 物理学 2017-03-23 Siddhartha Sen , Kumar S. Gupta

Recently (PRL 96, 106804 (2006)) it was suggested that cobaltocene(CC) molecules encapsulated into (7,7) carbon nanotubes (CNT@(7,7)) could be the basis for new spintronic devices. We show here based on impact molecular dynamics and DFT…

The present paper investigates the cross-sectional morphology of Multiwalled Carbon Nanotubes (MWNTs) restrained radially and circumferentially by an infinite surrounding elastic medium, subjected to uniform external hydrostatic pressure.…

材料科学 · 物理学 2015-05-13 Motohiro Sato , Hiroyuki Shima , Kohtaroh Iiboshi

Structural and thermal characteristics of crystalline ropes of single-wall carbon nanotubes (SWCNTs) are investigated. Novel crystalline ropes of polygonized SWCNTs produced by laser irradiation exhibit rounded-hexagonal cross sections in…

材料科学 · 物理学 2015-10-28 M. J. Lopez , A. Rubio , J. A. Alonsos

We have studied the electronic structure and charge-carrier dynamics of individual single-wall carbon nanotubes (SWNTs) and nanotube ropes using optical and electron-spectroscopic techniques. The electronic structure of semiconducting SWNTs…

材料科学 · 物理学 2009-11-10 A. Hagen , G. Moos , V. Talalaev , J. W. Tomm , T. Hertel

By means of pseudopotential calculations based on density functional theory (DFT) we studied the effect of hydrogenation on electronic properties of armchair single-wall carbon nanotubes. The calculations demonstrate strong preference for…

材料科学 · 物理学 2015-05-30 Željko Šljivančanin

Graphene has been reported with record-breaking properties which have opened up huge potential applications. Considerable amount of researches have been devoted to manipulating or modify the properties of graphene to target a more smart…

材料科学 · 物理学 2018-03-20 Kang Xia , Haifei Zhan , Yuantong Gu

A new mesoscale mechanical model, describing elastic interactions in carbon nanotubes (CNT) and other nanofilaments, is proposed. Functional form of the developed model is based on enhanced vector model (EVM) that describes basic types of…

介观与纳米尺度物理 · 物理学 2019-05-14 Vitaliy Petrov , Igor Ostanin , Petr Zhilyaev

Graphene, a thinnest material in the world, can form moire structures on different substrates, including graphite, h-BN, or metal surfaces. In such systems the structure of graphene, i. e. its corrugation, as well as its electronic and…

介观与纳米尺度物理 · 物理学 2016-07-12 Elena Voloshina , Yuriy Dedkov

Proposing new ways to organize carbon in 2D nanomaterials has been a relevant strategy in the search for systems with targeted properties for different applications. One focus is the study of fully sp$^2$ non-graphitic networks, with…

Various unique physical, chemical, mechanical and electronic properties of carbon nanotube (CNT) make it very useful materials for diverse potential application in many fields. Experimentally synthesized CNTs are generally found in bundle…

软凝聚态物质 · 物理学 2016-11-14 Debabrata Pramanik , Prabal K Maiti

Allotropes of carbon, including one-dimensional carbon nanotubes and two-dimensional graphene sheets, continue to draw attention as promising platforms for probing the physics of electrons in lower dimensions. Recent research has shown that…

介观与纳米尺度物理 · 物理学 2020-05-20 Benedetta Flebus , Allan H. MacDonald

Graphene nanoribbons (GNRs) are one-dimensional nanostructures predicted to display a rich variety of electronic behaviors. Depending on their structure, GNRs realize metallic and semiconducting electronic structures with band gaps that can…

介观与纳米尺度物理 · 物理学 2013-10-16 Oleg V. Yazyev

Carbon nanotubes (CNTs) are nonlinear high-Q resonators with strong coupling to single-electron tunneling. We begin by describing several methods to detect the flexural motion of a CNT resonator. Next, we illustrate how single-electron…

介观与纳米尺度物理 · 物理学 2012-05-23 Harold B. Meerwaldt , Gary A. Steele , Herre S. J. van der Zant

Three kinds of the response mechanisms to the external pressure have been found for double-walled carbon nanotube (DWNT) bundle, depending strongly on their average radius and symmetry. The small-diameter DWNT bundle undergoes a small…

材料科学 · 物理学 2015-05-13 Xiaoping Yang , Gang Wu , Jinming Dong

Carbon nanotube (CNT) is expected for much more important and broader applications in the future, because of its amazing electrical and mechanical properties. However, today, the prospect is detained by the fact that the growth of CNTs…

材料科学 · 物理学 2007-05-23 Shuang Zhang , Takeo Hoshi , Takeo Fujiwara

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.…

The validity of the DFT models implemented by FIREBALL for CNT electronic device modeling is assessed. The effective masses, band gaps, and transmission coefficients of semi-conducting, zigzag, (n,0) carbon nanotubes (CNTs) resulting from…

介观与纳米尺度物理 · 物理学 2007-05-23 Deep Shah , Nicolas A. Bruque , Khairul Alam , Roger K. Lake , Rajeev R. Pandey