The Optimization of Vertically Aligned Carbon Nanotubes’ Synthesis According to the Selected Parameters

2018 ◽  
Vol 937 ◽  
pp. 9-16
Author(s):  
Ewelina Pabjańczyk-Wlazło ◽  
Yuma Suzuki ◽  
Jungo Onoda ◽  
Tetsuhide Shimizu ◽  
Ming Yang
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor ◽  
Annealing Duration ◽  
Chemical Vapor Deposition Method ◽  
Synthesis Time ◽  
Vertically Aligned Carbon Nanotubes ◽  
Force Microscopy ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

Vertically aligned carbon nanotubes (VACNTs or CNTs) were synthetized by thermal chemical vapor deposition method on the Si/SiO2 substrates, using Al/Fe as catalyst. In the present study, the influence of the annealing duration and synthesis time on the length, grow rate and quality of the VACNTs according to 9 different regimes was investigated. The outcomes of the study was observed using scanning electron microscope, atomic force microscopy and Raman spectroscopy analysis was utilized in order to evaluate the quality of the obtained nanotubes. Results have shown that the length of the VACNTs increases with the rise of annealing time, however only to a certain degree, after which the deterioration of the nanotubes occurs and the reduction of their length is noticeable.

Vertically Aligned Carbon Nanotubes from Palm Oil Precursor

2013 ◽  
Vol 667 ◽  
pp. 542-548 ◽  
Author(s):  
A.B. Suriani ◽  
A.A. Azira ◽  
S.F. Nik ◽  
M.H. Taib ◽  
F. Mohamed ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Palm Oil ◽  
Ambient Pressure ◽  
Complex Structure ◽  
Chemical Vapor ◽  
Synthesis Process ◽  
Annealing Duration ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

This paper reports a study on vertically aligned carbon nanotubes (VACNTs) synthesized by thermal chemical vapor deposition (TCVD) method using eco-friendly carbon source; palm oil. Palm oil vaporized at 450oC in argon atmosphere at ambient pressure. For better decomposition of palm oil complex structure, ferrocene were added into palm oil and stirred for 20 minutes prior to synthesis process. The synthesis and annealing duration took 30 and 10 minutes respectively. The field emission scanning electron microscopy (FESEM) and infrared spectroscopy analysis were systematically studied on CNTs produced. The detailed of CNTs properties will be discussed further.

Anomalous Branch-structured Carbon Nanotubes on Silicon Substrates

2007 ◽  
Vol 1057 ◽  
Author(s):  
Yaser Abdi ◽  
Shams Mohajerzadeh ◽  
Kokab Baghbani ◽  
Sara Paydavosi ◽  
Ebrahim Asl Soleimani
Keyword(s):  
Carbon Nanotubes ◽  
Seed Layer ◽  
Hydrogen Plasma ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Silicon Substrates ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Anomalous Branch

ABSTRACTWe have grown vertically-aligned carbon nanotubes on (100) silicon substrates by means of a plasma enhanced chemical vapor deposition method. The growth of CNTs is achieved by a mixture of hydrogen and acetylene gases in a CVD reactor and a 2-5nm thick nickel is used as the seed for the growth. Following the growth of nanotubes on the silicon substrates, they are covered by a titanium-oxide layer and then the substrate is placed back into the original chamber to expose to a hydrogen plasma. Depending on the hydrogenation step, the nickel seed layer, which is placed on the tip side of the original nanotube, is expanded. The subsequent process in the same reactor leads to the growth of carbon nanotubes in a branched manner. Scanning electron microscopy has been used to investigate the results of such tree-like nanostructures.

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