Skip to main content
. 2006 Jun 23;91(7):2678–2686. doi: 10.1529/biophysj.106.082412

FIGURE 7.

FIGURE 7

Average dielectrophoretic spectra of erythrocytes in water (solid triangles), measured by changes in phase. Reference DEP spectra of the bare PEI-coated glass substrate (open squares) are also shown for comparison. Error bars represent 1 standard deviation for N = 3 cells and N = 30 measurements of the bare substrate. The error bars indicate the variation in DEP spectra across different erythrocyte cells. The solid line represents a fit of the DEP spectrum to Eq. 2 with a membrane capacitance of 3.0 μF/cm2 (CM indicated the real part of the Clausius-Mossotti factor). For the fit, it was assumed that ɛc = 60, σc = 366 mS/m, ɛs = 81, and σs = 10 mS/m, consistent with previous models for thin-shelled mammalian cells (2,4,5). DEP spectra were normalized before averaging to correct for systematic drift between measurements.