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Carbon nanotube field-effect transistors with sub 20 nm long channels and on/off current ratios of > 1000000 are demonstrated. Individual single-walled carbon nanotubes with diameters ranging from 0.7 nm to 1.1 nm grown from structured…

Materials Science · Physics 2015-06-24 R. V. Seidel , A. P. Graham , J. Kretz , B. Rajasekharan , G. S. Duesberg , M. Liebau , E. Unger , F. Kreupl , W. Hoenlein

The interactions between carbon nanotubes (CNTs) and metal adatoms as well as metal contacts are studied by means of ab initio electronic structure calculations. We show that the electronic properties of a semiconducting (8,4) CNT can be…

Mesoscale and Nanoscale Physics · Physics 2017-07-04 F. Fuchs , A. Zienert , C. Wagner , J. Schuster , S. E. Schulz

The work here has demonstrated the use a simple microwave plasma process for welding carbon nanotubes onto solid surfaces such as plastics and glasses, it was found that due to the lower softening point and viscosity of polystyrene…

Materials Science · Physics 2015-12-02 Pejman Talemi , George Simon

The propagation of azimuthally symmetric guided waves in multiwalled carbon nanotubes (MWCNTs) was analyzed theoretically in the mid-infrared and the visible regimes. The MWCNTs were modeled as ensembles of concentric, cylindrical,…

Materials Science · Physics 2009-11-13 M. V. Shuba , G. Ya. Slepyan , S. A. Maksimenko , C. Thomsen , A. Lakhtakia

We evaluated the doping effect of two types of multiwall carbon nanotube (CNT) with different aspect ratios on MgB2/Fe monofilament wires. Relationships between microstructure, magnetic critical current density (Jc), critical temperature…

Superconductivity · Physics 2009-11-11 J. H. Kim , W. K. Yeoh , M. J. Qin , X. Xu , S. X. Dou

Vapor pressure grows rapidly above the boiling temperature, and past the critical point liquid droplets disintegrate. Our atomistic simulations show that this sequence of events is reversed inside carbon nanotubes (CNT). Droplets…

Materials Science · Physics 2012-02-07 Vitaly V. Chaban , Victor V. Prezhdo , Oleg V. Prezhdo

Structural identification of double-walled carbon nanotubes (DWNT) is presented through a robust procedure based on the latest generation of transmission electron microscope, making possible a statistical analysis based on numerous…

Atomically thin one dimensional (1D) van der Waals wires of transition metal monochalocogenides (TMMs) have been anticipated as promising building blocks for integrated nanoelectronics. While reliable production of TMM nanowires has eluded…

The intrinsic mechanical strength of single-walled carbon nanotubes (SWNTs) within the diameter range of 0.3-0.8 nm has been studied based on ab initio density functional theory calculations. In contrast to predicting "smaller is stronger…

Materials Science · Physics 2016-01-06 Nguyen Tuan Hung , Do Van Truong , Vuong Van Thanh , Riichiro Saito

Advanced supercapacitors have great potential to transform how we store and utilize energy, leading to more efficient and sustainable energy systems. This study reveals the structural features influencing the interfacial thermal transport…

Applied Physics · Physics 2024-02-20 Sobin Alosious , Shern R. Tee , Debra J. Searles

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…

Materials Science · Physics 2020-09-15 N. A. Gudkov , S. V. Lomov , I. S. Akhatov , S. G. Abaimov

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…

Materials Science · Physics 2007-05-23 Hisashi Kajiura , Anil Nandyala , Alexey Bezryadin

We present a simple and scalable technique for the fabrication of solution processed & local gated carbon nanotube field effect transistors (CNT-FETs). The approach is based on directed assembly of individual single wall carbon nanotube…

Materials Science · Physics 2009-11-13 Paul Stokes , Saiful I. Khondaker

Transistors incorporating single-wall carbon nanotubes (CNTs) as the channel material are used in a variety of electronics applications. However, a competitive CNT-based technology requires the precise placement of CNTs at predefined…

Elastic radial deformation of multiwall carbon nanotubes (MWNTs) under hydrostatic pressure is investigated within the continuum elastic approximation. The thin-shell theory, with accurate elastic constants and interwall couplings, allows…

Mesoscale and Nanoscale Physics · Physics 2015-03-17 Hiroyuki Shima , Susanta Ghosh , Marino Arroyo , Kohtaroh Iiboshi , Motohiro Sato

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…

Mesoscale and Nanoscale Physics · Physics 2017-06-30 C. Wagner , J. Schuster , T. Gessner

We experimentally demonstrate laser-driven deposition of single-walled carbon nanotubes (CNTs) in suspended core fibers (SCFs) for the first time. Two samples for each SCF type with three (SCF1) and four (SCF2) air holes are individually…

Carbon Nanotube (CNT) appears as a promising candidate to shrink field-effect transistors (FET) to the nanometer scale. Extensive experimental works have been performed recently to develop the appropriate technology and to explore DC…

Other Condensed Matter · Physics 2009-11-13 H. Cazin d'Honincthun , S. Galdin-Retailleau , A. Bournel , P. Dollfus , J. -P. Bourgoin

Electronic applications of carbon nanotubes (CNTs) require the deposition of dielectric films on the tubes while conserving their excellent electronic properties. In our density functional theory study we use the trimethylaluminum (TMA)…

Mesoscale and Nanoscale Physics · Physics 2017-07-03 A. Förster , C. Wagner , J. Schuster , J. Friedrich

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…

Materials Science · Physics 2016-03-29 Alejandro Lopez-Bezanilla