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In this work, we investigate the electrical conductivity of carbon nanotubes (CNTs), with a particular focus on the effects of doping. Using a first-principles approach, we study the electronic structure, phonon dispersion, and…

材料科学 · 物理学 2024-08-07 Mina Yoon , German D. Samolyuk , Kai Li , James A. Hayne , Tolga Aytug

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 nanoribbons (CNRs) are graphene (planar) structures with large aspect ratio. Carbon nanobelts (CNBs) are small graphene nanoribbons rolled up into spiral-like structures, i. e., carbon nanoscrolls (CNSs) with large aspect ratio. In…

介观与纳米尺度物理 · 物理学 2015-05-18 B. V. C. Martins , D. S. Galvão

We investigate the piezoresistive effect of carbon nanotubes (CNTs) within density functional theory (DFT) aiming at application-relevant CNTs. CNTs are excellent candidates for the usage in nano-electromechanical sensors (NEMS) due to…

介观与纳米尺度物理 · 物理学 2017-06-30 C. Wagner , J. Schuster , T. Gessner

Vertically aligned carbon nanotube (CNT) forests are a particularly interesting class of nanomaterials, because they combine multifunctional properties, such as high energy absorption, compressive strength, recoverability and…

Carbon nanotubes (CNT) belong to the most promising new materials which can in the near future revolutionize the conventional electronics. When sandwiched between ferromagnetic electrodes, the CNT behaves like a spacer in conventional…

介观与纳米尺度物理 · 物理学 2009-11-10 S. Krompiewski

The material and electrical properties of the CNT single vias and array vias grown by microwave plasma-enhanced chemical vapor deposition were investigated. The diameters of multiwall carbon nanotubes (MWNTs) grown on the bottom electrode…

材料科学 · 物理学 2007-08-10 J. -H. Ting , C. -C. Chiu , F. -Y. Huang

We simulate quantum transport between a graphene nanoribbon (GNR) and a single-walled carbon nanotube (CNT) where electrons traverse vacuum gap between them. The GNR covers CNT over a nanoscale region while their relative rotation is 90…

介观与纳米尺度物理 · 物理学 2014-01-21 Kamal K. Saha , Branislav K. Nikolic

Junctionless transistors made of silicon have previously been demonstrated experimentally and by simulations. Junctionless devices do not require fabricating an abrupt source-drain junction and thus can be easier to implement in aggressive…

Single-walled carbon nanotubes (SWCNTs) in their pristine form have high thermal conductivity whose further improvement has attracted a lot of interest. Some theoretical studies have suggested that the thermal conductivity of a $(10,10)$…

材料科学 · 物理学 2020-02-11 Haikuan Dong , Zheyong Fan , Ping Qian , Tapio Ala-Nissila , Yanjing Su

Carbon nanotubes (CNT) have a very large application potential in the rapid developing field of molecular electronics. Infinite single-wall metallic CNTs have theoretically a conductance of 4e2/h because of the two electronic bands crossing…

介观与纳米尺度物理 · 物理学 2007-05-23 N. Ranjan , R. Gutierrez-Laliga , S. Krompiewski , G. Cuniberti

The apex region of a capped (5,5) carbon nanotube (CNT) has been modelled with the DFT package ONETEP, using boundary conditions provided by a classical calculation with a conducting surface in place of the CNT. Results from the DFT…

High-performance solution-processed short-channel carbon nanotube (CNT) thin film transistors (TFTs) are fabricated using densely aligned arrays of metallic CNTs (m-CNTs) as source and drain electrodes, and aligned arrays of semiconducting…

介观与纳米尺度物理 · 物理学 2015-06-18 Biddut K. Sarker , Narae Kang , Saiful I. Khondaker

Carbon fibers, especially those constructed from carbon nanotubes (CNTs), have attracted intensive interests from both scientific and engineering communities due to their outstanding physical properties. In this workHere we report, we find…

材料科学 · 物理学 2017-09-26 Haifei Zhan , Gang Zhang , Vincent B. C. Tan , Yuantong Gu

Carbon nanotubes (CNTs) are promising candidates to improve the thermal conductivity of nano-composites. The main obstacle to these applications is the extremely high thermal boundary (Kapitza) resistance between the CNTs and their matrix.…

介观与纳米尺度物理 · 物理学 2024-04-11 K. G. S. H. Gunawardana , Kieran Mullen

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) have attracted much attention for use in nanomechanical devices because of their exceptional properties, such as large resonant frequencies, low mass, and high quality factors. Here, we report the first experimental…

On the basis of the spin-polarized density functional theory calculations, we demonstrate that partially-open carbon nanotubes (CNTs) observed in recent experiments have rich electronic and magnetic properties which depend on the degree of…

材料科学 · 物理学 2009-11-16 Bing Huang , Young-Woo Son , Gunn Kim , Wenhui Duan , Jisoon Ihm

Using a tight-binding model and some well-known approaches and methods based on Green's function theory and Landauer formalism, we numerically investigate the conductance properties and I-V characteristics of zigzag single-walled BCN alloy…

介观与纳米尺度物理 · 物理学 2015-05-18 H Milani Moghaddam

The heat flux autocorrelation functions of carbon nanotubes (CNTs) with different radius and lengths is calculated using equilibrium molecular dynamics. The thermal conductance of CNTs is also calculated using the Green-Kubo relation from…

材料科学 · 物理学 2009-11-10 Zhenhua Yao , Jian-Sheng Wang , Baowen Li , Gui-Rong Liu