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Using first-principles calculations, we perform a search for high-capacity hydrogen storage media based on individually dispersed calcium atoms on doped or defective carbon nanotubes. We find that up to six H2 molecules can bind to a Ca…

材料科学 · 物理学 2009-01-20 Hoonkyung Lee , Jisoon Ihm , Marvin L. Cohen , Steven G. Louie

The doping of lighter non-metals like boron and nitrogen into graphene represents a promising advancement in the field of nano-electronic devices, particularly in the development of field-effect transistors (FETs). These doped…

材料科学 · 物理学 2023-08-16 Vivek Kumar Yadav

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

The field emission properties of ion irradiated multiwalled carbon nanotubes (MWCNTs) and doublewalled carbon nanotubes (DWCNTs) have been studied. The carbon nanotubes synthesized by a chemical vapor deposition method were irradiated by…

材料科学 · 物理学 2014-04-28 P. M. Koinkar , A. Kumar , D. K. Avasthi , M. A. More , Ri-ichi Murakami

The possibility to control electrokinetic transport through carbon and hexagonal boron nitride (hBN) nanotubes has recently opened new avenues for nanofluidic approaches to face outstanding challenges such as energy production and…

化学物理 · 物理学 2022-02-08 Etienne Mangaud , Marie-Laure Bocquet , Lydéric Bocquet , Benjamin Rotenberg

The charge transport properties of individual, metallic nitrogen doped, single-walled carbon nanotubes are investigated. It is demonstrated that n-type conduction can be achieved by nitrogen doping. Evidence was obtained by appealing to…

材料科学 · 物理学 2009-11-11 V. Krstic , G. L. J. A. Rikken , P. Bernier , S. Roth , M. Glerup

We employ first-principles calculations based density-functional-theory (DFT) approach to study electronic properties of partially and fully edge-hydrogenated armchair boron-nitrogen-carbon (BNC) nanoribbons (ABNCNRs), with widths between…

材料科学 · 物理学 2018-05-09 Naresh Alaal , Nikhil Medhekar , Alok Shukla

Controlling doping is essential for a successful integration of semiconductor materials into device technologies. However, the assessment of doping levels and the distribution of charge carriers in carbon nanotubes or other nanoscale…

Carbon Nanotube (CNT) is one of the most significant materials for the development of faster and improved performance of nano-scaled transistors. This paper aims at analyzing a trade-off between device performance and device size of CNT…

应用物理 · 物理学 2018-11-20 Imtiaj Khan , Ovishek Morshed , Sharif Mohammad Mominuzzaman

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

We perform a first principle calculation on the electronic properties of carbon doped graphitic boron nitride graphitic BN. It was found that carbon substitution for either boron or nitrogen atom in graphitic BN can induce spontaneous…

其他凝聚态物理 · 物理学 2009-11-11 R. Wu , L. Liu , Y. P. Feng

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

We present an atomistic self-consistent study of the electronic and transport properties of semiconducting carbon nanotube in contact with metal electrodes of different work functions, which shows simultaneous electron and hole doping…

介观与纳米尺度物理 · 物理学 2009-11-11 Yongqiang Xue , Mark A. Ratner

We present a study on the mechanical configuration and the electronic properties of semiconducting carbon nanotubes supported by partially depassivated silicon substrates, as inferred from topographic and spectroscopic data acquired with a…

介观与纳米尺度物理 · 物理学 2010-01-28 Salvador Barraza-Lopez , Peter M. Albrecht , Joseph W. Lyding

We report conductance measurements on multiwall carbon nanotubes in a perpendicular magnetic field. A gate electrode with large capacitance is used to considerably vary the nanotube Fermi level. This enables us to search for signatures of…

介观与纳米尺度物理 · 物理学 2007-05-23 Bernhard Stojetz , Csilla Miko , Laszlo Forro , Christoph Strunk

Nitrogen doped carbon nanotubes have been synthesized using pyrolysis and characterized by Scanning Tunneling Spectroscopy and transmission electron microscopy. The doped nanotubes are all metallic and exhibit strong electron donor states…

Response of a single-walled carbon nanotube to external electric field, F, is calculated analytically within the classical electrostatics. Field-induced charge density distribution is approximately linear along the axis of metallic nanotube…

介观与纳米尺度物理 · 物理学 2007-05-23 E. G. Mishchenko , M. E. Raikh

We theoretically studied the electronic and electrical properties of metallic and semiconducting peapods with encapsulated C_{60} (C_{60}@CNT) as a function of the carbon nanotube (CNT) diameter. For exothermic peapods (CNT diameter > 11.8…

材料科学 · 物理学 2009-11-10 A. Rochefort

We have synthesized a large amount of boron-doped multiwalled carbon nanotubes (MWNTs) by hot-filament chemical vapor deposition. The synthesis was carried out in a flask using a methanol solution of boric acid as a source material. The…

材料科学 · 物理学 2015-05-13 S. Ishii , M. Nagao , T. Watanabe , S. Tsuda , T. Yamaguchi , Y. Takano

Low frequency 1/f noise is investigated in graphene, encapsulated between hexagonal boron nitride (hBN) substrate in dual gated geometry. The overall noise magnitude is smaller as compared to graphene on Si/SiO2 substrate. The noise…

介观与纳米尺度物理 · 物理学 2021-12-15 Chandan Kumar , Anindya Das