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Actuation of aligned Carbon Nanotube Arrays

Geier, Sebastian and Mahrholz, Thorsten and Wierach, Peter and Sinapius, Michael (2019) Actuation of aligned Carbon Nanotube Arrays. NT19: International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials, 21.-26. July 2019, Würzburg, Germany.

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The active behaviour of carbon nanotubes (CNTs) can be observed when CNTs are positioned within an electric field and immersed into an electrolyte. Several explanations are given, ranging from nanoscopic effects such as carbon bonds weakening by electron doping or atomistic double layer-induced interaction of electron orbitals. Also macroscopic effects such as volume changes as result of ion intercalation, gas generation or electrostatic effects have been proposed. In this paper experiments aligned, continuous CNT-arrays of macroscopic dimensions (3mm) are tested electromechanically in contrast to former tested CNT-papers. Their behaviour is tested at different conditions and by using different electrolytes within a modified tensile testing machine. The tests reveal almost no condition dependency, which can be explained by the presence of the neat carbon bonds. The specimen orientation and the test approach exclude macroscopic effects such as volume effects by ion diffusion. The measured free strain and the behavior of the force can be assigned to an elongation of the neat carbon structure. Furthermore, asymmetric progressions of the results at negative and positive potentials seem to be related to ion-interaction. It must be assumed that superimposing effects are measured.

Item URL in elib:https://elib.dlr.de/130024/
Document Type:Conference or Workshop Item (Poster)
Title:Actuation of aligned Carbon Nanotube Arrays
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Geier, SebastianSebastian.Geier (at) dlr.dehttps://orcid.org/0000-0001-7941-3630
Mahrholz, ThorstenThorsten.Mahrholz (at) dlr.dehttps://orcid.org/0000-0003-1488-0910
Wierach, PeterPeter.Wierach (at) dlr.deUNSPECIFIED
Sinapius, MichaelMichael.Sinapius (at) dlr.deUNSPECIFIED
Date:21 July 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:carbon nanotube, actuation, Bucky paper, ion diffusion, Array, actuation mechanism
Event Title:NT19: International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials
Event Location:Würzburg, Germany
Event Type:international Conference
Event Dates:21.-26. July 2019
Organizer:Karlsruher Institute of Technology, University Erlangen, University Würzburg;
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Peakpower Superkondensatoren (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Geier, Sebastian
Deposited On:18 Nov 2019 08:15
Last Modified:18 Nov 2019 08:15

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