Position sensing of cells in diagnostic test systems by impedance measurement

In cell-based biosensors which are used in test systems it is advantageous to position cells in array structures. Here, cells are positioned by hydrodynamic flow in microfabricated array structures on suction micro-holes with ring electrodes. The electrode impedance is measured to investigate if the positioning of cells can be electrically monitored. It is shown that hydrodynamic positioning of cells can be monitored by impedance measurement.