Journal Article10.1002/ELPS.200900717
Particle trapping using dielectrophoretically patterned carbon nanotubes
Khashayar Khoshmanesh,Chen Zhang,Saeid Nahavandi,Francisco J. Tovar-Lopez,Sara Baratchi,Zheng Hu,Arnan Mitchell,Kourosh Kalantar-zadeh +7 more
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TL;DR: It is shown that the presence of MWCNT significantly changes performance of the system, which is investigated by trapping sample polystyrene particles with plain, COOH and goat anti‐mouse IgG surfaces.
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Abstract: This study presents the dielectrophoretic (DEP) assembly of multi-walled carbon nanotubes (MWCNTs) between curved microelectrodes for the purpose of trapping polystyrene microparticles within a microfluidic system. Under normal conditions, polystyrene particles exhibit negative DEP behaviour and are repelled from microelectrodes. Interestingly, the addition of MWCNTs to the system alters this situation in two ways: first, they coat the surface of particles and change their dielectric properties to exhibit positive DEP behaviour; second, the assembled MWCNTs are highly conductive and after the deposition serve as extensions to the microelectrodes. They establish an array of nanoelectrodes that initiates from the edge of microelectrodes and grow along the electric field lines. These nanoelectrodes can effectively trap the MWCNT-coated particles, since they cover a large portion of the microchannel bottom surface and also create a much stronger electric field than the primary microelectrodes as confirmed by our numerical simulations. We will show that the presence of MWCNT significantly changes performance of the system, which is investigated by trapping sample polystyrene particles with plain, COOH and goat anti-mouse IgG surfaces.
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Citations
Dielectrophoresis: From Molecular to Micrometer-Scale Analytes.
TL;DR: Recent DEP studies and applications for analyte dimensions below the size of a typical mammalian cells are focused on and include studies related to microbes, sub-cellular entities such as organelles and exosomes but also to biomolecules such as nucleic acids and proteins.
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Electrophoretic deposition of carbon nanotubes: recent progress and remaining challenges
TL;DR: A comprehensive review of the EPD of CNTs can be found in this paper, where the authors present a method to assemble carbon nanotube (CNT) coatings and composite films with controlled architectures.
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On-chip separation of Lactobacillus bacteria from yeasts using dielectrophoresis
Khashayar Khoshmanesh,Sara Baratchi,Francisco J. Tovar-Lopez,Saeid Nahavandi,Donald Wlodkowic,Arnan Mitchell,Kourosh Kalantar-zadeh +6 more
TL;DR: A microfluidic system, which utilises a combination of dielectrophoretic (DEP) and hydrodynamic drag forces to separate Lactobacillus bacteria from a background of yeasts.
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Size based separation of microparticles using a dielectrophoretic activated system
Khashayar Khoshmanesh,Chen Zhang,Saeid Nahavandi,Francisco J. Tovar-Lopez,Sara Baratchi,Arnan Mitchell,Kourosh Kalantar-zadeh +6 more
TL;DR: In this paper, the separation of polystyrene microparticles suspended in deionized (DI) water according to their dimensions using a dielectrophoretic (DEP) system was described.
Trapping and imaging of micron-sized embryos using dielectrophoresis.
Khashayar Khoshmanesh,Khashayar Khoshmanesh,Nimrod B. Kiss,Saeid Nahavandi,Clive W. Evans,Jonathan M. Cooper,David E. Williams,Donald Wlodkowic +7 more
TL;DR: This work provides proof‐of‐concept application of chip‐based technologies for the analysis of individual embryos trapped under DEP force.
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