Synthesis of tall carpets of vertically aligned carbon nanotubes by in situ generation of water vapor through preheating of added oxygen

Carbon ◽  
2012 ◽  
Vol 50 (11) ◽  
pp. 4002-4009 ◽  
Author(s):  
Gilbert D. Nessim ◽  
Ahmed Al-Obeidi ◽  
Haviv Grisaru ◽  
Erik S. Polsen ◽  
C. Ryan Oliver ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Water Vapor ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
In Situ Generation

scholarly journals Phase transitions and in situ dynamics of crystal grain formation of alumina nanotubes templated by vertically aligned carbon nanotubes

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 68251-68259 ◽  
Author(s):  
L. F. Lampert ◽  
A. Barnum ◽  
S. W. Smith ◽  
J. F. Conley ◽  
J. Jiao
Keyword(s):  
Carbon Nanotubes ◽  
Phase Transitions ◽  
Atomic Layer ◽  
Vertically Aligned Carbon Nanotubes ◽  
Layer Deposition ◽  
Aligned Carbon Nanotubes ◽  
Grain Formation ◽  
Vertically Aligned ◽  
Induced Crystallization

Vertically aligned alumina nanotubes created by atomic layer deposition onto carbon nanotubes scaffolds are synthesized and analyzed for phase transitionsviathermal annealing andin situelectron-irradiation induced crystallization.

scholarly journals A Review on Micro-Patterning Processes of Vertically Aligned Carbon Nanotubes Array (VACNTs Array)

2019 ◽  
Vol 15 (4) ◽  
pp. 328-353 ◽  
Author(s):  
Mohd Asyraf Bin Mohd Razib ◽  
Tanveer Saleh
Keyword(s):  
Carbon Nanotubes ◽  
Angle Sensor ◽  
Micro Electro Mechanical Systems ◽  
Vertically Aligned Carbon Nanotubes ◽  
Advantages And Disadvantages ◽  
Micro Patterning ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Different Characteristics

Vertically Aligned Carbon Nanotubes array which is also sometimes labeled as carbon nanotubes forests has many applications in several engineering fields for its remarkable mechanical, electrical, optical, and thermal properties. The Vertically Aligned Carbon Nanotubes array is often employed in developing microdevices such as pressure sensor, angle sensor, switches, etc. To successfully integrate carbon nanotubes forest to the micro-electro-mechanical systems based devices, micropatterning of the carbon nanotubes forest is required. There are several methods available to realize micropatterning of Vertically Aligned Carbon Nanotubes array, from in-situ patterning during the growth process to post-patterning process. Each has its advantages and disadvantages. This paper will discuss elaborately different patterning processes of the carbon nanotubes forest and their different characteristics.

scholarly journals Growth of Vertically Aligned Carbon Nanotubes on Silicon Using a Sparked Iron-Cobalt Catalyst

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Sirikamon Saengmee-anupharb ◽  
Sanitta Thongpang ◽  
Erwin S. P. Bertheir ◽  
Pisith Singjai
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Water Vapor ◽  
Chemical Vapor ◽  
Band Ratio ◽  
Vertically Aligned Carbon Nanotubes ◽  
Transmission Electron ◽  
Aligned Carbon Nanotubes ◽  
Pressure Chemical ◽  
Vertically Aligned

Vertically aligned carbon nanotubes (VA-CNTs) were successfully grown on silicon substrates by atmospheric pressure chemical vapor deposition at 750∘C using acetylene as a carbon source and Fe-Co nanoparticle thin films as a cocatalyst. Preparation of the cocatalyst was operated by an economical sparking process. A small amount of water vapor was introduced into the reactor by controlling diffusion by heated water in a flask. The CNTs were characterized by scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The VA-CNTs were obtained only when the water vapor fraction in the introduced gas was in the range of 310–440 ppm. The length of the VA-CNTs reached 0.8 mm with a growth rate of 17 μm/min. Moreover, D/G-band ratio suggests that the optimum fraction of water vapor decreases defects in CNTs.

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