A method to determine the parameters of the double layer of a planar interdigital sensor

Abstract

In this work, we present a new method for a planar interdigital transducer to determine the electrical parameters (relative permittivity, capacitance and thickness) of the double layer (DL) on the surface of the electrode loaded by a biological medium. A theoretical approach has been proposed to define these parameters. The CoventorWare software was used to simulate the model design of interdigital transducer. The simulation results show that the method can determine the parameters of double layers of a planar interdigital sensor. These results are consistent with the theoretical analysis.

A comprehensive study over the jaundice causes and effects on newborns and reviewing the treatment effects

“…Absorption is carried out in the range of 300 to 900 nm, and the results of this study give us information about the skin metabolites. 23 Melanin, which is in the epidermis layer and it is the main pigment of the skin and hair, is the main cause of light obstruction. 24 Hemoglobin also absorbs light.…”

Optimize the Geometrical Parameters of Interdigital Micro-Electrodes Used in Bioimpedance Sensing System

“…The capacitance at the contact surface of each positive and negative electrode with the biological medium is represented by the capacitance Cint.p; and Cint.n. if, C0 is the capacitance per unit area (pF/μm 2 ) and A is the surface of each electrodes (μm 2 ); Since the number of negative electrodes and the number of positive electrodes are the same (N/2), Thus, the total capacitance at the contact surface is determined by [11]:…”

“…The polarization appears at the contact surface between electrodes and solutions. The impedance of polarization is determined by [11]: int 1 .…”

“…where j is the imaginary symbol,  is the angular pulsation (rad/s), Z is the complex impedance (), Y is the complex admittance (S), G is the conductance (S), C is the capacitance (F). On the other hand, the total impedance and the total admittance in the equivalent electric circuit are calculated by [11]:…”

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