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The dielectrophoretic(DEP) force acting on a cell in an electric field is experimentally determined. A cell is accelerated by the DEP force in an electric field generated between micro planar electrodes. The position of the cell is measured and the velocity and acceleration of the cell are calculated based on the measured position data. The DEP force is determined from the motion equation of a moving cell in suspension. The electrode structure is fabricated by micromachining technology and the height of electrodes is 1㎛. Radish cell and yeast are used in the experiments. In the case of radish cell, the DEP force increases as voltage or frequency(1㎒-3㎒) increases. The voltage dependence can be explained that the DEP force increases when ▽/E/² increases. The frequency dependence means that Re[X_eff] of radish cell is maximized in a certain frequency. In the case of yeast, the DEP force increases only as voltage increases. The reason for the voltage dependence is the same with the case of radish. The DEP force on a yeast does not vary when the frequency varies from 1㎒ to 3㎒. This result coincides with the fact that the value of calculated Re[X_(eff)] is constant in the test frequency range.

목차

Abstract

Ⅰ. Introduction

Ⅱ. Determination of the DEP Force

Ⅲ. Fabrication Process of the Micro Electrode Structure

Ⅳ. Results and Discussion

Ⅴ. Conclusion

Acknowledgements

References

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UCI(KEPA) : I410-ECN-0101-2009-569-017764699