scholarly journals Octagonal Defects at Carbon Nanotube Junctions

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
W. Jaskólski ◽  
M. Pelc ◽  
Leonor Chico ◽  
A. Ayuela
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Coulomb Interaction ◽  
Fermi Energy ◽  
Localized States ◽  
Carbon Nanotube Junctions

We investigate knee-shaped junctions of semiconductor zigzag carbon nanotubes. Two dissimilar octagons appear at such junctions; one of them can reconstruct into a pair of pentagons. The junction with two octagons presents two degenerate localized states at Fermi energy (EF). The reconstructed junction has only one state nearEF, indicating that these localized states are related to the octagonal defects. The inclusion of Coulomb interaction splits the localized states in the junction with two octagons, yielding an antiferromagnetic system.

Photochemical generation of bis-hexahapto chromium interconnects between the graphene surfaces of single-walled carbon nanotubes

2015 ◽  
Vol 2 (1) ◽  
pp. 81-85 ◽  
Author(s):  
Aron Pekker ◽  
Mingguang Chen ◽  
Elena Bekyarova ◽  
Robert C. Haddon
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Photochemical Generation ◽  
Carbon Nanotube Junctions ◽  
Walled Carbon Nanotubes

The linkage of single-walled carbon nanotube junctions by the photochemistry of organometallic chromium reagents produces dramatic increases in network conductivity.

scholarly journals Carbon Nanotube Junctions: Multibranched Junctions of Carbon Nanotubes via Cobalt Particles (Adv. Mater. 44/2009)

2009 ◽  
Vol 21 (44) ◽  
pp. NA-NA
Author(s):  
Julio A. Rodríguez-Manzo ◽  
Ming-Sheng Wang ◽  
Florian Banhart ◽  
Yoshio Bando ◽  
Dmitri Golberg
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Carbon Nanotube Junctions

A THEORETICAL ANALYSIS ON THE FERMI LEVEL IN MULTIWALLED CARBON NANOTUBES

2004 ◽  
Vol 18 (11) ◽  
pp. 501-503 ◽  
Author(s):  
M. A. GRADO-CAFFARO ◽  
M. GRADO-CAFFARO
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Theoretical Analysis ◽  
Fermi Level ◽  
Multiwalled Carbon Nanotubes ◽  
Quantum Number ◽  
Fermi Energy ◽  
Classical Limit ◽  
Fermi Velocity ◽  
Multiwalled Carbon

The Fermi level for a multiwalled carbon nanotube is determined analytically by using the Fermi velocity obtained from the particle-in-a-box model. Fermi energy is found to be quantized so that the corresponding quantum number coincides with the wall number. In addition, the classical limit is discussed.

Molecular Dynamics Study on the Generation of Single-Walled Carbon Nanotubes Junction by Direct C60 Bombardment

2015 ◽  
Vol 1089 ◽  
pp. 109-112
Author(s):  
Xue Ming Yang ◽  
Yan Hui Huang ◽  
Long Jie Wang
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Carbon Nanotube ◽  
Single Walled Carbon Nanotubes ◽  
Building Blocks ◽  
Covalent Bonds ◽  
Single Walled Carbon ◽  
Carbon Nanotube Junctions ◽  
Walled Carbon Nanotubes

Carbon nanotubes have been considered as promising materials for applications of nanodevices. As building blocks, carbon nanotube junctions formed by carbon-carbon covalent bonds are desired nanostructures for carbon nanotube based materials, however the formation of the junctions made of C-C bonds is still quite challenging. In this paper, a molecular dynamics study on the generation of single-walled carbon nanotubes junction by direct C60bombardment is conducted. Results show that carbon nanotube junctions can be formed by direct C60bombardment, however the structure of the formed junction is similar as the riveted structure in some case and the C60bombardment may lead to uncontrollable bonding disorder in the joints.

scholarly journals A One‐Step Chemical Strategy for the Formation of Carbon Nanotube Junctions in Aqueous Solution: Reaction of DNA‐Wrapped Carbon Nanotubes with Diazonium Salts

ChemPlusChem ◽  
2019 ◽  
Vol 84 (9) ◽  
pp. 1235-1238 ◽  
Author(s):  
Pierrick Clément ◽  
Piera Trinchera ◽  
Keitel Cervantes‐Salguero ◽  
Qingyu Ye ◽  
Christopher R. Jones ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Carbon Nanotube ◽  
Diazonium Salts ◽  
Carbon Nanotube Junctions ◽  
One Step ◽  
Solution Reaction ◽  
Chemical Strategy

Electronic Properties of Potassium-Doped Carbon Nanotube Lattice

1999 ◽  
Vol 593 ◽  
Author(s):  
Susumu Saito
Keyword(s):  
Carbon Nanotubes ◽  
Electronic Structure ◽  
Charge Transfer ◽  
Carbon Nanotube ◽  
Density Of States ◽  
Fermi Energy ◽  
Level Density ◽  
Crystalline Lattice ◽  
Electronic Band ◽  
Tile Size

ABSTRACTWe study the electronic structure of potassium-doped crystalline lattice of so-called (10.10) carbon nanotubes in the framework of the density-finctional theory. Tie stoichiometrv of the material studied is K2C80 which was originally proposed in designing the superconducting doped nanotube material based on tile size of dopants and the charge transfer being favorable for superconductivity. Electronic band dispersions obtained are actually found to be very similar to those of the pristine (10,10) nanotube lattice with the upward shift of the Fermi energy by 1 eV above the second conduction-band miinimum. Tie system therefore possesses higher Fermi-level density of states than the pristine material with rather sinmple charge transfer from K to C sites, and is confirned to be a good candidate for a naxiotube superconductor.

Fabrication of Carbon Nanotube Triode Using Helicon Plasma Cvd with Electroplated Nico Catalyst

2003 ◽  
Vol 772 ◽  
Author(s):  
Masakazu Muroyama ◽  
Kazuto Kimura ◽  
Takao Yagi ◽  
Ichiro Saito
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Metal Catalyst ◽  
Ni Catalyst ◽  
Plasma Cvd ◽  
Helicon Plasma ◽  
Plasma Enhanced Cvd ◽  
Turn On ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

AbstractA carbon nanotube triode using Helicon Plasma-enhanced CVD with electroplated NiCo catalyst has been successfully fabricated. Isolated NiCo based metal catalyst was deposited at the bottom of the cathode wells by electroplating methods to control the density of carbon nanotubes and also reduce the activation energy of its growth. Helicon Plasma-enhanced CVD (HPECVD) has been used to deposit nanotubes at 400°C. Vertically aligned carbon nanotubes were then grown selectively on the electroplated Ni catalyst. Field emission measurements were performed with a triode structure. At a cathode to anode gap of 1.1mm, the turn on voltage for the gate was 170V.

scholarly journals Explosive Molecule Sensing at Lattice Defect Sites in Metallic Carbon Nanotubes

2021 ◽  
Author(s):  
Manasi Doshi ◽  
Eric Paul Fahrenthold
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Experimental Research ◽  
Gas Sensing ◽  
Lattice Defect ◽  
Sensing Mechanism ◽  
Defect Sites ◽  
Chemiresistive Sensing ◽  
Hazardous Gas

Explosives and hazardous gas sensing using carbon nanotube (CNT) based sensors has been a focus of considerable experimental research. The simplest sensors have employed a chemiresistive sensing mechanism, and rely...

Cure Behavior Changes and Compression of Carbon Nanotubes in Aerospace Grade Bismaleimide-Carbon Nanotube Sheet Nanocomposites

2021 ◽  
Author(s):  
Mohammad Hamza Kirmani ◽  
Geeta Sachdeva ◽  
Ravindra Pandey ◽  
Gregory M. Odegard ◽  
Richard Liang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Behavior Changes ◽  
Cure Behavior

scholarly journals Tight-binding investigation of the structural and vibrational properties of graphene–single wall carbon nanotube junctions

2021 ◽  
Author(s):  
Juhi Srivastava ◽  
Anshu Gaur
Keyword(s):  
Charge Transfer ◽  
Carbon Nanotube ◽  
Phonon Mode ◽  
Tight Binding ◽  
Hybrid Nanostructures ◽  
Structural Deformation ◽  
Vibrational Properties ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Carbon Nanotube Junctions

The phonon mode frequencies of SWNT and SLG in hybrid nanostructures are sensitive to various interactions, such as vdW forces, structural deformation and/or charge transfer between SWNT and SLG.

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