Structural Changes of Carbon Nanotubes Prepared by Fermented Glutinous Rice at Different Vaporization and Deposition Temperatures of Thermal-CVD

2009 ◽  
Author(s):  
S. F. Nik ◽  
N. F. A. Zainal ◽  
A. Azira ◽  
M. Rusop ◽  
Mohamad Rusop ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Structural Changes ◽  
Thermal Cvd ◽  
Glutinous Rice

Growth of carbon nanotubes directly on a nickel surface by thermal CVD

2006 ◽  
Vol 60 (29-30) ◽  
pp. 3761-3765 ◽  
Author(s):  
Naveen Krishna Reddy ◽  
Jean-Luc Meunier ◽  
Sylvain Coulombe
Keyword(s):  
Carbon Nanotubes ◽  
Nickel Surface ◽  
Thermal Cvd

Comparison of structural changes in nitrogen and boron-doped multi-walled carbon nanotubes

Carbon ◽  
2010 ◽  
Vol 48 (11) ◽  
pp. 3033-3041 ◽  
Author(s):  
Antal A. Koós ◽  
Frank Dillon ◽  
Ekaterina A. Obraztsova ◽  
Alison Crossley ◽  
Nicole Grobert
Keyword(s):  
Carbon Nanotubes ◽  
Structural Changes ◽  
Boron Doped ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Synthesis of Carbon Nanotubes and Nanofibers by Thermal CVD on SiO2 and Al2O3 Support Layers

2009 ◽  
Vol 9 (7) ◽  
pp. 4143-4150 ◽  
Author(s):  
Marina R. Aguiar ◽  
Carla Verissimo ◽  
Antonio C. S. Ramos ◽  
Stanislav A. Moshkalev ◽  
Jacobus W. Swart
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Cvd ◽  
Synthesis Of Carbon Nanotubes

scholarly journals Synthesis of Carbon Nanotubes by Plasma-Enhanced Chemical Vapor Deposition Using Fe1−xMnxO Nanoparticles as Catalysts: How Does the Catalytic Activity of Graphitization Affect the Yields and Morphology?

2019 ◽  
Vol 5 (3) ◽  
pp. 46 ◽  
Author(s):  
Takashi Yanase ◽  
Takuya Miura ◽  
Tatsuya Shiratori ◽  
Mengting Weng ◽  
Taro Nagahama ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Thermal Cvd ◽  
Catalytic Function ◽  
Yield And Quality ◽  
Synthesis Of Carbon Nanotubes

The choice of a catalyst for carbon nanotube (CNT) growth is critical to controlling the morphology and chirality of the final product. Plasma-enhanced chemical vapor deposition (PECVD) can alleviate the requirements of the catalyst, i.e., they must be active for both the decomposition of the source gas and graphitization in the conventional thermal CVD. However, it is still not well understood how the catalytic activity of the graphitization affects the yield and quality of CNTs. In this paper, we systematically investigated the influence of the catalytic activity of graphitization by tuning the composition of Fe1−xMnxO (x = 0–1) nanoparticles as catalysts. As the Mn component increased, the number of CNTs decreased because Mn has no catalytic function of the graphitization. The quality of CNTs also affected by the inclusion of the Mn component. Our study may provide useful information to develop a new catalyst for CNT growth in PECVD.

scholarly journals Gas-Phase Growth of Heterostructures of Carbon Nanotubes and Bimetallic Nanowires

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Whi Dong Kim ◽  
Jung Min Park ◽  
Ji Young Ahn ◽  
Soo Hyung Kim
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Gas Phase ◽  
Average Length ◽  
Hydrogen Gas ◽  
Raman Spectrometry ◽  
Entire Surface ◽  
Thermal Cvd ◽  
Transmission Electron ◽  
Uniform Diameter

A simple, inexpensive, and viable method for growing multiple heterostructured carbon nanotubes (CNTs) over the entire surface of Ni-Al bimetallic nanowires (NWs) in the gas phase was developed. Polymer-templated bimetallic nitrate NWs were produced by electrospinning in the first step, and subsequent calcination resulted in the formation of bimetallic oxide NWs by thermal decomposition. In the second step, free-floating bimetallic NWs were produced by spray pyrolysis in an environment containing hydrogen gas as a reducing gas. These NWs were continuously introduced into a thermal CVD reactor in order to grow CNTs in the gas phase. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectrometry analyses revealed that the catalytic Ni sites exposed in the non-catalytic Al matrix over the entire surface of the bimetallic NWs were seeded to radially grow highly graphitized CNTs, which resembled “foxtail” structures. The grown CNTs were found to have a relatively uniform diameter of approximately10±2 nm and 10 to 15 walls with a hollow core. The average length of the gas-phase-grown CNTs can be controlled between 100 and 1000 nm by adjusting the residence time of the free-floating bimetallic NWs in the thermal CVD reactor.

Carbon nanotubes and a-C films simultaneously fabricated by thermal CVD

2002 ◽  
Vol 299-302 ◽  
pp. 868-873 ◽  
Author(s):  
H Yokomichi ◽  
F Sakai ◽  
M Ichihara ◽  
N Kishimoto
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Cvd

Thermal CVD synthesis of carbon nanotubes filled with single-crystalline Cu nanoneedles at tips

2006 ◽  
Vol 15 (9) ◽  
pp. 1271-1275 ◽  
Author(s):  
X.Y. Tao ◽  
X.B. Zhang ◽  
J.P. Cheng ◽  
Z.Q. Luo ◽  
S.M. Zhou ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Crystalline ◽  
Thermal Cvd ◽  
Cvd Synthesis ◽  
Synthesis Of Carbon Nanotubes

Direct integration of carbon nanotubes on micromachined hotplates

2007 ◽  
Vol 221 (3) ◽  
pp. 101-106
Author(s):  
M Vincent ◽  
D Briand ◽  
G Schürmann ◽  
N F de Rooij
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensors ◽  
Gas Flow ◽  
Electrical Contact ◽  
Superior Performance ◽  
Platinum Electrodes ◽  
Direct Integration ◽  
Spatial Control ◽  
Thermal Cvd ◽  
Metal Oxide Gas Sensors

This communication reports on the localized growth of carbon nanotubes (CNTs) on the surface of classical micro-hotplates with integrated heater and transducing electrodes. A catalytic thermal CVD process has been developed and adapted to grow CNTs by only using the heat provided by the integrated heater. Spatial control of the CNTs' growth was achieved thanks to this method; CNTs are localized only on the heating area of the micro-hotplate, and electrical contact with the integrated electrodes can be obtained. The influence of the catalyst, gas flow, and temperature cycles on the growth of CNT was investigated in order to optimize growth and avoid micro-hotplate degradation. Different strategies were investigated to get the electrical connection between the CNTs and the platinum electrodes. The electrically connected grown CNTs could be used directly as gas-sensitive resistors with superior performance in terms of sensitivity than metal—oxide gas sensors integrated on such platforms.

Intercalating 0.3 nm Single-Walled Carbon Nanotubes in Channels of SAPO-11 Crystals: Structural Changes

2017 ◽  
Vol 2 (33) ◽  
pp. 10926-10930
Author(s):  
Jianpang Zhai ◽  
Ruiyang Fang ◽  
Dunliang Jian ◽  
Qiangbing Wang ◽  
Shuangchen Ruan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Structural Changes ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes
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