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Controlling SWCNT assembling density by electrokinetics
Yu HB(于海波); Hermann, Sascha; Dong ZL(董再励); Mai, John; Li WJ(李文荣); Schulz, Stefan E.
Source PublicationSensors and Actuators, A: Physical
Indexed BySCI ; EI
EI Accession number20133116564118
WOS IDWOS:000325836400004
Contribution Rank1
KeywordAssembly Dielectric Devices Electric Fields Electric Properties Electrodes Electrodynamics Electromagnetic Fields Electronic Properties Electroosmosis Electrophoresis Single-walled Carbon Nanotubes (Swcn)
AbstractSingle-walled carbon nanotubes (SWCNTs) as the colloid in a colloidal solution can be polarized in a non-uniform electric field and experience a net force that is the so-called dielectrophoresis (DEP) force, due to the interaction between the induced dipoles and the electric field. The positive DEP force can be usedto position and assemble arrays of SWCNTs. Inversely, the negative DEP force can be utilized to separate SWCNTs in terms of their electronic properties. Moreover, Joule heating generated by the electric field can lead to other electrokinetics forces in the colloidal solution, which give rise to fluidic motion of the solution. Additionally, at low frequencies, the electrical double layer also induces a steady fluidic motion, a phenomenon known as AC electroosmotic flow. These fluidic motion in turn exerts a drag force on thenanotubes. Hence, to controllably assemble SWCNTs using DEP force is a non-trivial task. In this article, the mechanisms of electrokinetics and electrohydrodynamics are systematically analyzed through numerical simulations for a set of parameters that are typically used for assembling SWCNTs between metalelectrodes. Finally, experimental results from the frequency-dependent assembly of SWCNTs using this set of parameters are described and discussed. These results show that the density of SWCNTs assembled between electrodes can be varied by controlling the electrokinetics parameters.

WOS HeadingsScience & Technology ; Technology
WOS SubjectEngineering, Electrical & Electronic ; Instruments & Instrumentation
WOS Research AreaEngineering ; Instruments & Instrumentation
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLi WJ(李文荣)
Affiliation1.Key State Laboratory of Robotics, Shenyang Institute of Automation, CAS, Shenyang, China
2.Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, Hong Kong
3.Center for Microtechnologies (ZFM), Chemnitz University of Technology, Chemnitz, Germany
4.Department of Back-end of Line, Fraunhofer Institute for Electronic Nano Systems, Chemnitz, Germany
Recommended Citation
GB/T 7714
Yu HB,Hermann, Sascha,Dong ZL,et al. Controlling SWCNT assembling density by electrokinetics[J]. Sensors and Actuators, A: Physical,2013,201:36-42.
APA Yu HB,Hermann, Sascha,Dong ZL,Mai, John,Li WJ,&Schulz, Stefan E..(2013).Controlling SWCNT assembling density by electrokinetics.Sensors and Actuators, A: Physical,201,36-42.
MLA Yu HB,et al."Controlling SWCNT assembling density by electrokinetics".Sensors and Actuators, A: Physical 201(2013):36-42.
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