Nonlinear dielectric spectroscopy of live cells using superconducting quantum interference devices Academic Article

abstract

• Magnetic detection of the nonlinear response of cell suspensions to oscillating electrical fields is reported. It has been shown that H+ -ATPase, which is located in plasma membrane of yeast cells, generates harmonics of the fundamental frequency when electrically excited at certain frequencies and field strengths. Electrode polarization may cause erroneous results, especially when using a conventional four-probe setup. In this letter we use highly sensitive superconducting quantum interference device magnetometers to detect the cells' nonlinear response and to avoid electrode polarization effects. Experiments were carried out using yeast (Saccharomyces cerevisiae, 108 cellsml) cells with excitation voltages and frequencies between 1-5Vcm and 10-300 Hz, respectively. 2004 American Institute of Physics.

authors

• Benedik, Michael

published proceedings

• APPLIED PHYSICS LETTERS

author list (cited authors)

• Nawarathna, D., Claycomb, J. R., Miller, J. H., & Benedik, M. J.

citation count

• 18

complete list of authors

• Nawarathna, D||Claycomb, JR||Miller, JH||Benedik, MJ

publication date

• January 2005

publisher

• AIP Publishing  Publisher

published in

• Applied Physics Letters  Journal

Digital Object Identifier (DOI)

• 10.1063/1.1844036

start page

• 023902

end page

• 023902

volume

• 86

issue

• 2

URL

• http://dx.doi.org/10.1063/1.1844036