scholarly journals Synthesis of Nickel-Encapsulated Carbon Nanocapsules and Cup-Stacked-Type Carbon Nanotubes via Nickel-Doped Fullerene Nanowhiskers

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Tokushi Kizuka ◽  
Kun'ichi Miyazawa ◽  
Akira Akagawa
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanostructures ◽  
Heating Temperature ◽  
Toluene Solution ◽  
Precipitation Method ◽  
Nitrate Hexahydrate ◽  
Ni Nanoparticles ◽  
One Dimensional ◽  
Carbon Nanocapsules

Nickel- (Ni) doped C60nanowhiskers (NWs) were synthesized by a liquid-liquid interfacial precipitation method using a C60-saturated toluene solution and isopropanol with Ni nitrate hexahydrate Ni(NO3)2·6H2O. By varying the heating temperature of Ni-doped C60NWs, two types of one-dimensional carbon nanostructures were produced. By heating the NWs at 973 and 1173 K, carbon nanocapsules (CNCs) that encapsulated Ni nanoparticles were produced. The Ni-encapsulated CNCs joined one dimensionally to form chain structures. Upon heating the NWs to 1373 K, cup-stacked-type carbon nanotubes were synthesized.

scholarly journals Synthesis of Cobalt-Encapsulated Carbon Nanocapsules Using Cobalt-Doped Fullerene Nanowhiskers

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Daisuke Matsuura ◽  
Kun'ichi Miyazawa ◽  
Tokushi Kizuka
Keyword(s):  
Heating Temperature ◽  
Toluene Solution ◽  
Precipitation Method ◽  
Nitrate Hexahydrate ◽  
Packed Structure ◽  
Carbon Nanocapsules ◽  
Co Doped ◽  
Hexagonal Closed Packed

We synthesized cobalt- (Co-) doped C60 nanowhiskers (NWs) by applying a liquid-liquid interfacial precipitation method using a C60-saturated toluene solution and 2-propanol with Co nitrate hexahydrate (Co(NO3)3⋅6H2O). Heating the NWs at 873–1173 K produced carbon nanocapsules (CNCs) that encapsulated Co clusters with a hexagonal-closed-packed structure. After heating at 1273 K, the encapsulated Co clusters in CNCs were transformed into orthorhombic Co2C clusters. It was found that Co- and Co2C-encapsulated CNCs can be produced by varying heating temperature.

scholarly journals Synthesis of Carbon Nanocapsules and Nanotubes Using Fe-Doped Fullerene Nanowhiskers

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Tokushi Kizuka ◽  
Kun'ichi Miyazawa ◽  
Daisuke Matsuura
Keyword(s):  
Carbon Nanotubes ◽  
Toluene Solution ◽  
Precipitation Method ◽  
Ferric Nitrate ◽  
Nitrate Nonahydrate ◽  
Carbon Nanocapsules

We synthesized iron-(Fe-)doped C60nanowhiskers (NWs) by applying the liquid-liquid interfacial precipitation method that employs a C60-saturated toluene solution and a solution of 2-propanol containing ferric nitrate nonahydrate (Fe(NO3)3⋅9H2O). Fe particles of 3–7 nm in diameter were precipitated in the NWs. By heating at 1173 K, the NWs were transformed into hollow and Fe3C-encapsulated carbon nanocapsules and carbon nanotubes.

Evaluation of the Role of Au in Improving Catalytic Activity of Ni Nanoparticles for the Formation of One-Dimensional Carbon Nanostructures

Nano Letters ◽  
2011 ◽  
Vol 11 (6) ◽  
pp. 2464-2471 ◽  
Author(s):  
Renu Sharma ◽  
See-Wee Chee ◽  
Andrew Herzing ◽  
Ryan Miranda ◽  
Peter Rez
Keyword(s):  
Catalytic Activity ◽  
Carbon Nanostructures ◽  
Ni Nanoparticles ◽  
One Dimensional

scholarly journals The Formation of Carbon Nanostructures via Catalytic Pyrolysis of Naphthalene under Its Autogenic Pressure

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Chao-Gang Wang ◽  
Xiao-Hong Shao ◽  
Rui-Sheng Xue
Keyword(s):  
Carbon Nanotubes ◽  
Powder Mixture ◽  
Carbon Nanostructures ◽  
Catalytic Pyrolysis ◽  
Elevated Temperatures ◽  
Acetate Tetrahydrate ◽  
Carbon Spheres ◽  
Nickel Acetate Tetrahydrate ◽  
Spherical Carbon ◽  
Carbon Nanocapsules

The formation of carbon nanotubes (CNTs), spherical carbon nanocapsules (CNCs), and carbon spheres (CSs) is accomplished by using the method of reactions under autogenic pressure at elevated temperatures (RAPET). A powder mixture of naphthalene and nickel acetate tetrahydrate is dissociated under its autogenic pressure. The resultant CNTs and CNCs exhibit good graphitic quality, and the diameters range from 50~200 nm. Smooth and monodisperse CSs with the diameter ranging from 5~10 μm can be obtained by pyrolysis of pure naphthalene. Our results show that the reaction temperature and catalyst proportion play a key role in the formation of carbon nanostructures with RAPET method.

Synergistic effect of carbon nanotubes and graphitic carbon nitride on the enhanced supercapacitor performance of cobalt diselenide-based composites

2021 ◽  
Author(s):  
Mingjie Li ◽  
Xuan Zheng ◽  
Xiang Li ◽  
Youjun Yu ◽  
Jinlong Jiang
Keyword(s):  
Carbon Nanotubes ◽  
Transition Metal ◽  
Synergistic Effect ◽  
Hydrothermal Method ◽  
High Performance ◽  
Carbon Nitride ◽  
Electrode Materials ◽  
One Dimensional ◽  
Supercapacitor Performance ◽  
Metal Selenides

Recently, transition metal selenides have been investigated extensively as promising electrode materials for high-performance supercapacitors. Herein, the multi-component CoSe2/CNTs@g-C3N4 composites are prepared using a two-step hydrothermal method by incorporating one-dimensional...

scholarly journals Gate-tunable plasmons in mixed-dimensional van der Waals heterostructures

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sheng Wang ◽  
SeokJae Yoo ◽  
Sihan Zhao ◽  
Wenyu Zhao ◽  
Salman Kahn ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carrier Density ◽  
Electromagnetic Interaction ◽  
Luttinger Liquid ◽  
Fundamental Physics ◽  
Metallic Structures ◽  
One Dimensional ◽  
Figures Of Merit ◽  
Electrostatic Gating ◽  
Plasmon Dispersion

AbstractSurface plasmons, collective electromagnetic excitations coupled to conduction electron oscillations, enable the manipulation of light–matter interactions at the nanoscale. Plasmon dispersion of metallic structures depends sensitively on their dimensionality and has been intensively studied for fundamental physics as well as applied technologies. Here, we report possible evidence for gate-tunable hybrid plasmons from the dimensionally mixed coupling between one-dimensional (1D) carbon nanotubes and two-dimensional (2D) graphene. In contrast to the carrier density-independent 1D Luttinger liquid plasmons in bare metallic carbon nanotubes, plasmon wavelengths in the 1D-2D heterostructure are modulated by 75% via electrostatic gating while retaining the high figures of merit of 1D plasmons. We propose a theoretical model to describe the electromagnetic interaction between plasmons in nanotubes and graphene, suggesting plasmon hybridization as a possible origin for the observed large plasmon modulation. The mixed-dimensional plasmonic heterostructures may enable diverse designs of tunable plasmonic nanodevices.

Control of one-dimensional transport in multi-wall carbon nanotubes by wall destruction

2003 ◽  
Vol 34 (3-6) ◽  
pp. 371-375
Author(s):  
T Sasaki ◽  
K Miyamoto ◽  
N Oguri ◽  
K Ishibashi ◽  
N Aoki ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
One Dimensional ◽  
Multi Wall Carbon Nanotubes
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