dielectrophoresisn.
/dʌɪɪˌlɛktrəʊfəˈriːsɪs/ Chemistry.
The migration of particles of a dielectric, or other particles carrying no net charge, towards the position of maximum field strength in a non-uniform electric field.
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dielectrophoresis1951
1951 H. A. Pohl in Jrnl. Appl. Physics 22 869/1 The phenomenon seen in the relative motion of suspensoid and medium resulting from polarization forces produced by an inhomogeneous electric field is defined as ‘dielectrophoresis’.
1972 Science 23 June 1336/1 Unlike electrophoresis, dielectrophoresis will occur in a-c as well as d-c fields provided that the frequency is low enough for the dipolar orientation to follow the field reversals.
1977 Oil & Gas Jrnl. 28 Mar. 73/1 This new system utilizes the principles of dielectrophoresis to remove fine solid particles from hydrocarbon streams.
1983 Financial Times 31 May 18/2 The a.c. field regiments the cells, lining them up ‘shoulder-to-shoulder’ between the electrodes. This is achieved with a frequency of 10,000 hertz–1 megahertz by a process called dielectrophoresis.
This entry has not yet been fully updated (first published 1993; most recently modified version published online March 2019).
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