Optically-induced dielectrophoretic technology for cells screening

The ODEP technology has many advantages such as low light energy (∼ 10
²
W/cm
²
), virtual electrodes, large manipulating area and rapid screening of cells. In this paper, the 10 µm and 20 µm polystyrene beads are successfully separated by a 40 µm light line width with variable radius circle. Human colon cancer cells (HT-29) concentration experiments are demonstrated and can achieve at the maximum speed about 100 µm/sec.