Size dependent conduction characteristics of catalyst-multi-walled carbon nanotube junction

Barnett Chris J.; Orbaek White Alvin; Barron Andrew R.

doi:10.1007/s42823-020-00215-0

Size dependent conduction characteristics of catalyst-multi-walled carbon nanotube junction

Carbon Letters
Abbr : Carbon Lett.
2021, 31(5), pp.1015-1021
DOI : 10.1007/s42823-020-00215-0
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General
Received : October 21, 2020
Accepted : December 9, 2020
Published : October 1, 2021

Barnett Chris J. ¹, Orbaek White Alvin ¹, Barron Andrew R. ¹

¹Energy Safety Research Institute, Swansea University Bay Campus

Accredited

ABSTRACT

Multi-walled carbon nanotubes (MWCNTs) grown by chemical vapor deposition retain the residual catalyst particles from which the growth occurred, which are considered a detriment to MWCNTs’ performance, especially electrical conductivity. The frst direct measurements have been made of the electrical transport through the catalyst cap into the MWCNT using nanoscale 2-point-probe to determine the efects of the catalyst particle’s size and the diameter ratio with its associated MWCNT on the electrical transport through the catalyst cap as compared to the inherent conductivity of the MWCNT. The MWCNT diameter is independent of the catalyst size, but the ratio of the catalyst cap diameter to MWCNT diameter (DC/DNT) determines the conduction mechanism. Where DC/DNT is greater than 1 the resulting I–V curve is near ohmic, and the conduction through the catalyst (RC+NT) approaches that of the MWCNT (RNT); however, when the DC/DNT<1 the I–V curves shift to rectifying and RC+NT> >RNT. The experimental results are discussed in relation to current crowding at the interface between catalyst and nanotube due to an increased electric feld.

KEYWORDS

Multi-walled carbon nanotubes · Catalyst · Electrical conductivity · Contact resistance · Nanoprobe

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Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 4.82

Size dependent conduction characteristics of catalyst-multi-walled carbon nanotube junction

ABSTRACT

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Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-27)

Total Citation Counts(KCI+WOS) (2) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (2) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-07-01)

* References for papers published after 2023 are currently being built.

Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 4.82

Size dependent conduction characteristics of catalyst-multi-walled carbon nanotube junction

ABSTRACT

KEYWORDS

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WoS Citation Counts (2) This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-27)

Total Citation Counts(KCI+WOS) (2) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (2) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-07-01)

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This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-27)

* References for papers published after 2023 are currently being built.