Vapor-phase epitaxial re-growth of large diameter single-walled carbon nanotubes

Vapor-phase epitaxial re-growth of large diameter single-walled carbon nanotubes

Long single-wall carbon nanotubes (SWCNTs) with a controlled conductivity type or chirality are interesting for fundamental study and are promising in many different technological applications, such as nanoelectronics, optoelectronics, and also upon utilizing them as nanoscale reactors to produce na...

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Bibliographic Details
Published in:Applied physics letters Vol. 118; no. 16
Main Authors: Fedotov, Pavel V., Eremina, Valentina A., Musatov, Dmitriy A., Obraztsova, Ekaterina A., Obraztsova, Elena D.
Format: Journal Article
Language:English
Published: Melville American Institute of Physics 19-04-2021
Subjects:
Acetylene
Applied physics
Chirality
Epitaxial growth
Ethanol
Nanoelectronics
Nanomaterials
Optoelectronics
Single wall carbon nanotubes
Substrates
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Summary:Long single-wall carbon nanotubes (SWCNTs) with a controlled conductivity type or chirality are interesting for fundamental study and are promising in many different technological applications, such as nanoelectronics, optoelectronics, and also upon utilizing them as nanoscale reactors to produce nanomaterials. In this study, the long aligned large diameter SWCNTs and the large diameter nanotube dense networks were synthesized via a vapor-phase epitaxial re-growth method. The nanotubes were re-grown on ST (stable temperature)-cut quartz substrates from short SWCNT seeds using the mixture of ethanol and acetylene as a precursor. The efficient nanotube re-growth was achieved using unsorted SWCNTs with diameters of 1.2–2.0 nm and semiconducting SWCNTs, sorted by an aqueous two-phase extraction method, as seeds. According to our study, the re-grown nanotubes in an array have an average length of 5.5 μm, while the individual re-grown nanotubes can reach up to 20–30 μm. The extensive optical study confirms the preservation of SWCNTs diameter during the re-growth and signifies the high quality of produced nanotubes. We demonstrate the SWCNT chirality selective efficiency of the re-growth, which leads to predominance of the metallic nanotubes.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0043918