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Principles of carbon nanotube dielectrophoresis

Li, Wenshan 1; Hennrich, Frank 1,2,3; Flavel, Benjamin S. 1; Dehm, Simone 1; Kappes, Manfred 1,2; Krupke, Ralph 1,3
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Institut für Physikalische Chemie (IPC), Karlsruher Institut für Technologie (KIT)
3 Institut für QuantenMaterialien und Technologien (IQMT), Karlsruher Institut für Technologie (KIT)


Dielectrophoresis (DEP) describes the motion of suspended objects when exposed to an inhomogeneous electric field. It has been successful as a method for parallel and site-selective assembling of nanotubes from a dispersion into a sophisticated device architecture. Researchers have conducted extensive works to understand the DEP of nanotubes in aqueous ionic surfactant solutions. However, only recently, DEP was applied to polymer-wrapped single-walled carbon nanotubes (SWCNTs) in organic solvents due to the availability of ultra-pure SWCNT content. In this paper, the focus is on the difference between the DEP in aqueous and organic solutions. It starts with an introduction into the DEP of carbon nanotubes (CNT-DEP) to provide a comprehensive, in-depth theoretical background before discussing in detail the experimental procedures and conditions. For academic interests, this work focuses on the CNT-DEP deposition scheme, discusses the importance of the electrical double layer, and employs finite element simulations to optimize CNT-DEP deposition condition with respect to the experimental observation. An important outcome is an understanding of why DEP in organic solvents allows for the deposition and alignment of SWCNTs in low-frequency and even static electric fields, and why the response of semiconducting SWCNTs (s-SWCNTs) is strongly enhanced in non-conducting, weakly polarizable media. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000129352
Veröffentlicht am 28.09.2021
DOI: 10.1007/s12274-020-3183-0
Zitationen: 13
Web of Science
Zitationen: 13
Zitationen: 12
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Physikalische Chemie (IPC)
Institut für QuantenMaterialien und Technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1998-0000, 1998-0124
KITopen-ID: 1000129352
HGF-Programm 47.11.05 (POF IV, LK 01) Towards Quantum and Neuromorphic Computing Functionalities
Weitere HGF-Programme 43.31.02 (POF IV, LK 01) Devices and Applications
Erschienen in Nano research
Verlag Springer Verlag
Band 14
Heft 7
Seiten 2188–2206
Vorab online veröffentlicht am 08.01.2021
Nachgewiesen in Scopus
Web of Science
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