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Article

Systematic Investigations of Annealing and Functionalization of Carbon Nanotube Yarns

by
Maik Scholz
1,2,
Yasuhiko Hayashi
3,*,
Victoria Eckert
1,2,
Vyacheslav Khavrus
1,†,
Albrecht Leonhardt
1,
Bernd Büchner
1,4,
Michael Mertig
2,5 and
Silke Hampel
1,*
1
Leibniz Institute for Solid State and Material Research Dresden, Helmholtzstr. 20, 01069 Dresden, Germany
2
Institute for Physical Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
3
Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita, Okayama 700-8530, Japan
4
Institute for Solid State Physics, Technische Universität Dresden, 01062 Dresden, Germany
5
Kurt-Schwabe-Institut für Mess- und Sensortechnik e.V. Meinsberg, 04736 Waldheim, Germany
*
Authors to whom correspondence should be addressed.
†
Current address: Life Science Inkubator Sachsen GmbH & Co. KG, Tatzberg 47, 01307 Dresden, Germany.
Molecules 2020, 25(5), 1144; https://doi.org/10.3390/molecules25051144
Submission received: 11 December 2019 / Revised: 25 February 2020 / Accepted: 28 February 2020 / Published: 4 March 2020
(This article belongs to the Special Issue Materials Chemistry of Fullerenes, Graphenes and Carbon Nanotubes)
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Abstract

Carbon nanotube yarns (CNY) are a novel carbonaceous material and have received a great deal of interest since the beginning of the 21st century. CNY are of particular interest due to their useful heat conducting, electrical conducting, and mechanical properties. The electrical conductivity of carbon nanotube yarns can also be influenced by functionalization and annealing. A systematical study of this post synthetic treatment will assist in understanding what factors influences the conductivity of these materials. In this investigation, it is shown that the electrical conductivity can be increased by a factor of 2 and 5.5 through functionalization with acids and high temperature annealing respectively. The scale of the enhancement is dependent on the reducing of intertube space in case of functionalization. For annealing, not only is the highly graphitic structure of the carbon nanotubes (CNT) important, but it is also shown to influence the residual amorphous carbon in the structure. The promising results of this study can help to utilize CNY as a replacement for common materials in the field of electrical wiring.
Keywords: carbon nanotube yarns; carbon nanotube; functionalization; electrical conductivity; annealing; acid treatment carbon nanotube yarns; carbon nanotube; functionalization; electrical conductivity; annealing; acid treatment
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MDPI and ACS Style

Scholz, M.; Hayashi, Y.; Eckert, V.; Khavrus, V.; Leonhardt, A.; Büchner, B.; Mertig, M.; Hampel, S. Systematic Investigations of Annealing and Functionalization of Carbon Nanotube Yarns. Molecules 2020, 25, 1144. https://doi.org/10.3390/molecules25051144

AMA Style

Scholz M, Hayashi Y, Eckert V, Khavrus V, Leonhardt A, Büchner B, Mertig M, Hampel S. Systematic Investigations of Annealing and Functionalization of Carbon Nanotube Yarns. Molecules. 2020; 25(5):1144. https://doi.org/10.3390/molecules25051144

Chicago/Turabian Style

Scholz, Maik, Yasuhiko Hayashi, Victoria Eckert, Vyacheslav Khavrus, Albrecht Leonhardt, Bernd Büchner, Michael Mertig, and Silke Hampel. 2020. "Systematic Investigations of Annealing and Functionalization of Carbon Nanotube Yarns" Molecules 25, no. 5: 1144. https://doi.org/10.3390/molecules25051144

APA Style

Scholz, M., Hayashi, Y., Eckert, V., Khavrus, V., Leonhardt, A., Büchner, B., Mertig, M., & Hampel, S. (2020). Systematic Investigations of Annealing and Functionalization of Carbon Nanotube Yarns. Molecules, 25(5), 1144. https://doi.org/10.3390/molecules25051144

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