A non-invasive characterization of a biological cell using impedance spectroscopy
2012-11
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
A non-invasive characterization of a biological cell using impedance spectroscopy
Authors
Published Date
2012-11
Publisher
Type
Thesis or Dissertation
Abstract
This dissertation studies the electric characterization of biological cells by proposing an analytical model describing the electrical properties of a cell. This model is mathematically derived from electromagnetic phenomena of polarizable substances in electric field. It can provide the insight how the properties of each area, such as cell membrane, cytoplasm, nuclear envelope, effect the overall properties. Since biological cells tend to have a spherical shape in a cell suspension, it is modeled as a sphere or ellipsoid, containing a cell membrane, a cytoplasm, a nuclear envelope, and a nucleoplasm. The analytical equation for explaining the effects of a cell in electric field and the response of a cell in electric field is mathematically derived. This model can be applied in several areas, such as electroporation, dielectrophoresis and impedance spectroscopy.
Impedance spectroscopy has been widely used as a characterization method for electrochemical systems and starting to be used in the biomedical area as a characterization tool, since it can facilitate a non-invasive characterization, which is not possible in a traditional biochemical method. The characterization of a cell using impedance spectroscopy requires an electrical circuit model or mathematical model describing the whole system. The proposed model can suggest more detailed and realistic mathematical and circuit model for a biological cell.
The mathematical model for the impedance of a cell suspension is obtained by solving Laplace’s equation and Maxwell-Wagner’s equation. From the mathematical impedance model, a new equivalent circuit model is proposed to represent a cell suspension. The electric properties of a cell are calculated using the complex nonlinear least square method, which minimizes the square error between the measured impedance and the theoretically predicted impedance.
This model is applied to study the conductivities and permittivities of the nucleoplasm, the nuclear envelope, the cytoplasm and the cell membrane of human embryonic stem cells (HSF-6) and induced pluripotent stem cells.
Additionally, this model can be used in manipulation techniques, such as electroporation, electrofusion and dielectrophoresis. The transmembrane potential, which is the key factor in electroporation and electrofusion, and the Clausius-Mossotti factor, which determines the magnitude and the direction of dielectrophoretic force, are evaluated in detail.
Keywords
Description
University of Minnesota Ph.D. dissertation. November 2012. Major: Electrical Engineering. Advisor: James E Holte. 1 computer file (PDF); xii, 124 pages, appendix A.
Related to
Replaces
License
Collections
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
Kim, Nahyoung. (2012). A non-invasive characterization of a biological cell using impedance spectroscopy. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/142738.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.