Low-Cost Sputtering Process for Carbon Nanotubes Synthesis

According to their wonderful properties, carbon nanotubes (CNTs) have been well known for decades. The synthesis process and catalyst deposition method have also drawn attention to control the nanotube structure and properties. Sputtering method is then one promising option to grow the nanotubes in...

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Veröffentlicht in:Applied Mechanics and Materials 2019-05, Vol.891, p.195-199
Hauptverfasser: Thurakitseree, Theerapol, Pakpum, Chupong
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Pakpum, Chupong
description According to their wonderful properties, carbon nanotubes (CNTs) have been well known for decades. The synthesis process and catalyst deposition method have also drawn attention to control the nanotube structure and properties. Sputtering method is then one promising option to grow the nanotubes in mass production. This method is, however, still costly. Here, we have presented a simple low-cost custom-made DC magnetron sputtering for catalyst thin film deposition. Three different metal thin films (Fe, Ni, Cu) deposited on Si substrates have been employed to investigate nanotube production. Prior to deposition of the catalysts, Al was used as supporting layer. (Al/Fe, Al/Ni, Al/Cu). CNTs were grown by chemical vapor deposition process at 800°C. Ethanol was preliminary used as a carbon source. It was found that CNTs could be successfully grown from only Al/Ni catalysts in our system with the diameter of approximately 200 nm, where the rest of samples were not observed. In addition, vertical-aligned CNTs with the thickness of about 10 μm could be obtained when acetylene was replaced instead of ethanol with reducing partial pressure of the feedstock. A large D-band at 1338 cm-1 with broader G-band at 1582 cm-1 from Raman spectra give a rise to multi layers growth of sp2 carbon walls. Such dimension suggests that it is the characteristic of multi-walled carbon nanotubes.
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subjects Acetylene
Aluminum
Carbon
Catalysis
Catalysts
Chemical synthesis
Chemical vapor deposition
Copper
Ethanol
Iron
Low cost
Magnetron sputtering
Mass production
Multi wall carbon nanotubes
Nickel
Organic chemistry
Partial pressure
Raman spectra
Silicon substrates
Thin films
title Low-Cost Sputtering Process for Carbon Nanotubes Synthesis
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