Definition
AC electrokinetics is the name given to a group of techniques that utilize alternating (AC) electric fields to move dielectric particles in suspension. AC electrokinetics of nanoparticles refers to methods of exerting electrical force and/or torque on particles of nanometer dimensions, examples of which are viruses, macromolecules, and colloidal particles.
Introduction
Dielectrics do not bear a net charge but rather polarize when subjected to electric fields. When dielectric particles in suspension are subjected to electric fields, polarization results in charge accumulation at the particle/electrolyte interface. Electrode polarization may also occur, giving rise to the buildup of a double layer of ions and counterions at the electrode/electrolyte interface. Particle polarization is represented by effective dipole and higher-order moments. AC electrokinetic forces and torques...
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References
O’Konski, C.T.: Electric properties of macromolecules V: theory of ionic polarization in polyelectrolytes. J. Phys. Chem. 64, 605–619 (1960)
Nili, H., Sun, T., Green, N.G.: Higher-order dielectrophoretic force characterisation of non-spherical particles. J. Phys. Conf. Ser. 301, 012061 (2011)
Nili, H., Green, N.G.: Higher-order dielectrophoresis of nonspherical particles. Phys. Rev. E 89, 063302 (2014)
Pohl, H.A.: Dielectrophoresis: The Behavior of Neutral Matter in Nonuniform Electric Fields. Cambridge University Press, Cambridge (1978)
Pohl, H.A.: The motion and precipitation of suspensoids in divergent electric fields. J. Appl. Phys. 22, 869–871 (1951)
Green, N.G.: Dielectrophoresis of Sub-micrometre particles. Thesis, University of Glasgow, Glasgow. (1998)
Pethig, R.: Review article – dielectrophoresis: status of the theory, technology, and applications. Biomicrofluidics 4, 022811 (2010)
Krupke, R., Hennrich, F., von Lohneysen, H., Kappes, M.M.: Separation of metallic from semiconducting single-walled carbon nanotubes. Science 301, 344–347 (2003)
Hermanson, K.D., Lumsdon, S.O., Williams, J.P., Kaler, E.W., Velev, O.D.: Dielectrophoretic assembly of electrically functional microwires from nanoparticle suspensions. Science 238, 1082–1086 (2001)
Morgan, H., Holmes, D., Green, N.G.: 3D focusing of nanoparticles in microfluidic channels. IEE Proc. Nanobiotechnol 150, 76–81 (2003)
Morgan, H., Green, N.G.: AC Electrokinetics of Colloids and Nanoparticles. Research Studies Press, Baldock, Herts, UK (2003)
Jones, T.B.: Electromechanics of Particles. Cambridge University Press, Cambridge (1995)
Arnold, W.M., Zimmermann, U.: Electro-rotation– development of a technique for dielectric measurements on individual cells and particles. J. Electrost. 21, 151–191 (1988)
Washizu, M., Shikida, M., Aizawa, S., Hotani, H.: Orientation and transformation of flagella in electrostatic field. IEEE Trans. IAS 28, 1194–1202 (1992)
Arcenegui, J.J., Garcia-Sanchez, P., Morgan, H., Ramos, A.: Electro-orientation and electrorotation of metal nanowires. Phys. Rev. E 88, 063018 (2013)
Hughes, M.P.: AC electrokinetics: applications for nanotechnology. Nanotechnology 11, 124–132 (2000)
Masuda, S., Washizu, M., Iwadare, M.: Separation of small particles suspended in liquid by nonuniform traveling field. IEEE Trans. Ind. Appl. 23, 474–480 (1987)
Hagedorn, R., Fuhr, G., Muller, T., Schnelle, T., Schnakenberg, U., Wagner, B.: Design of asynchronous dielectric micromotors. J. Electrost. 33, 159–185 (1994)
Li, W.H., Du, H., Chen, D.F., Shu, C.: Analysis of dielectrophoretic electrode arrays for nanoparticle manipulation. Comp. Mater. Sci. 30, 320–325 (2004)
Ramos, A., Morgan, H., Green, N.G., Castellanos, A.: AC electric-field-induced fluid flow in microelectrodes. J. Colloid Interface Sci. 217, 420–422 (1999)
Ramos, A., Morgan, H., Green, N.G., Castellanos, A.: AC electrokinetics: a review of forces in microelectrode structures. J. Phys. D. Appl. Phys. 31, 2338–2353 (1998)
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Nili, H., Green, N.G. (2016). AC Electrokinetics of Nanoparticles. In: Bhushan, B. (eds) Encyclopedia of Nanotechnology. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9780-1_130
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DOI: https://doi.org/10.1007/978-94-017-9780-1_130
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