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Dielectrophoretic study of human erythrocytes
G Gopala Krishna1, A K Anwar Ali, D R Mohan
1Department of Physics, Nizam College, Hyderabad, India.
Journal of Biomedical Engineering
|September 1, 1989
Summary
This study investigates dielectrophoresis of human erythrocytes. Dielectrophoretic collection rate (DCR) varies with electric field frequency, voltage, and medium conductivity, confirming dielectrophoresis theory.
Area of Science:
- Biophysics
- Cellular Electrophysiology
Background:
- Human erythrocytes (red blood cells) are crucial for biological studies.
- Dielectrophoresis (DEP) is a label-free technique for manipulating cells using non-uniform electric fields.
Purpose of the Study:
- To systematically investigate the dielectrophoretic behavior of human erythrocytes.
- To determine the influence of key physical variables on the dielectrophoretic collection rate (DCR).
Main Methods:
- Utilized a cylindrical electric field geometry for dielectrophoretic studies.
- Systematically varied electric field frequency, voltage, medium conductivity, cell concentration, and exposure time.
- Measured the dielectrophoretic collection rate (DCR) under controlled conditions.
Main Results:
- Observed frequency-dependent DCR, with minimum, maximum, and null yield ranges.
- Demonstrated distinct DCR spectra for erythrocytes between 0.3-1.5 MHz.
- Confirmed theoretical predictions of dielectrophoresis through DCR responses to voltage, concentration, and time.
Conclusions:
- Dielectrophoretic collection rate of human erythrocytes is highly sensitive to electric field parameters and medium properties.
- The observed frequency-dependent DCR is linked to the complex dielectric properties of erythrocytes and the suspending medium.
- This research validates the application of dielectrophoresis for characterizing and potentially manipulating erythrocytes.