Table 1 Extracted impedance parameters by fitting the experimentally measured impedance of Fig. 1 to Eqs [3,4].

From: Electrochemical noise and impedance of Au electrode/electrolyte interfaces enabling extracellular detection of glioma cell populations

Area S (mm2)

Q (Ω−1 sn)

n

Rct (Ω)

Rct*S (Ωcm2)

Cdl (μF/cm2)

Rsol (Ω)

ρ (Ωcm)

2

1.35 × 10−7

0.93

1 × 108

1.35 × 106

16.6

5.52 × 102

1.76 × 102

6

3.45 × 10−7

0.95

7 × 106

2.15 × 105

12.0

3.30 × 102

1.82 × 102

10.5

5.9 × 10−7

0.96

3.4 × 106

1.8 × 105

11.6

2.98 × 102

2.18 × 102

  1. The double layer capacitance, Cdl, is calculated using Eq. [5]. The numbers for the surface resistance, Rct*S where S is the area of the electrode, and capacitance per unit area have been corrected for a factor of 2 to account for the two identical electrodes used in the measurements.
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