This paper presents a label-free and noninvasive cell-counting assay system for electrical diagnostic tests of Falciparum malaria using electric impedance spectroscopy (EIS). Our system enabled a high-throughput test in a compact form-factor by the integration of a microfluidic device and a custom circuit board. Based on the differentiation of dielectric properties between cells and container m...

Rainer Schmidt,1,* Wilma Eerenstein,1 Thomas Winiecki,2 Finlay D. Morrison,3 and Paul A. Midgley1 1Department of Materials Science, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, United Kingdom 2Department of Physics, University of Durham, South Road, Durham DH1 3LE, United Kingdom 3Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, United Ki...

in this study, the four cr-mn-(ni-free) austenitic steels were fabricated by vacuum induction furnace. then plates with 10 mm thickness were fabricated by hot-rolling. corrosion behaviour of the four cr-mn steels in 0.1 m h2so4 solution was investigated using by open-circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy (eis). the results indicated that the...

Abstrac t This paper describes the latest major improvement made to gene expression programming (GEP) for use in impedance spectroscopy. This change consists on systematically analysing the fittest element of each population of the GEP to identify circuit components that are useless in the sense that they do not significantly contribute to the impedance response at the analysed frequency range....

Electrical impedance tomography (EIT) is a noninvasive type of medical imaging in which the electrical conductivity, permittivity, and impedance of a part of the body is inferred from surface electrode measurements and used to form a tomographic image of that part. Electrical conductivity varies considerably among various biological tissues (absolute EIT) or the movement of fluids and gases wit...

We investigate the influence of the adsorption phenomenon on the impedance spectroscopy measurements. The analysis is performed by assuming that the ions have the same mobility and the electrodes are perfectly blocking. We find that in the low frequency range the presence of the adsorption phenomenon is responsible for an increasing of the real part of the impedance of the cell, similar to the ...

A comparative study of benzene oxidation at boron-doped diamond (BDD) and nitrogenated nanocrystalline diamond (NCD) anodes in 0.5 M K(2)SO(4) aqueous solution is conducted by using cyclic voltammetry and electrochemical impedance spectroscopy. It is shown by measurements of differential capacitance and anodic current that during the benzene oxidation at the BDD electrode, adsorption of a react...

LaNi4.4Sn0.25 and graphite powder disk electrodes sandwiched between two nickel screens were used as working electrodes in 6.0 M KOH and in 1.0 M LiPF6 in propylene carbonate-ethylene carbonate-dimethyl carbonate ~1:1:3! solution, respectively. Different electrochemical impedance spectroscopy protocols were used for analysis of the kinetics of insertion and extraction of hydrogen and lithium in...

Impedance circuit identification through spectroscopy is used to characterize sensors. When the circuit topology is known, genetic algorithms can be used to obtain the circuit component values. Gene expression programming can be used to search for an adequate circuit topology. In this paper, an improved version of the impedance circuit identification based on gene expression programming and hyb...

A mathematical model is developed to calculate the impedance response of a semiconductor electrode to a sinusoidal current perturbation under subbandgap monochromatic illumination. The model accounts explicitly for electron and hole transport as well as generation and recombination through band-to-band mechanisms and through bulk deep-level electron acceptors of specified energy. The model resu...