Microfabricated interdigitated electrode

FIGURE 3 Schematic illustration of the microfabricated, interdigitated electrode array. 

TABLE 1 Summary of Key Parameters and Properties of Microfabricated Interdigitated Electrode Arrays... 

The microfabricated interdigitated electrode aiTays used in this work were first studied by AC impedance spectroscopy in standard KCl solutions. Figure 4 shows the impedance spectrum of the platinum device and the corresponding (same) plat-... 

Sheppard, N. F., Tucker, R. C., and Wu, C., Electrical conductivity measurements using microfabricated interdigitated electrodes. Anal. Chem., 65, 1199 (1993). 

Li, H. B., and Bashir, R. (2002). Dielectrophoretic separation and manipulation of live and heat-treated cells of Listeria on microfabricated devices with interdigitated electrodes. Sens. Actuators B Chem. 86, 215-221. 

Microfabricated Interdigitated Microsensor Electrodes (IMEs), Planar Metal Electrodes (PMEs), Independently Addressable Microband Electrodes (lAMEs), and E Chem Cell-On-A-Chip . An ABTECHApplication Note... 

A picture of a microfabricated interdigitated microsensor electrode, (b) a schematic illustration of the IME, (c) the Bode plot of I Z I and 9 obtained from the frequency-dependent interrogation of an IME 1525.3 ITO device in 0.01 M PBS containing 10 mM [Ee(CN)e] (solid line, 10 mV p-t-p, offset = 0) and the corresponding fitting data (dotted line), and (d) the equivalent circuit model derived from the NLLS fitting of the impedance data... 

The use of microfabricated interdigitated microsensor electrode arrays and AC impedance presents a powerful tool for the study of the dynamic behavior of chem-... 

A significant boom in AC dielectrophoretic research occurred when microfabrication became widely available. This enabled precise fabrication of electrode systems (interdigitated electrodes, etc.), which created very symmetric, reproducible nonuniform electric fields enabling cellular responses to such fields to be more precisely quantified. It became apparent that at radio frequencies, cells were selectively controlled due to their inherent intra membrane polarizability characteristics. This attribute was exploited to sort cells because one ceU type responded in a unique fashion from other cells at specific AC frequencies. Genetically or geometrically similar cells were found to have more similar, but still distinct, responses at given frequencies [2]. 

Fig. 3 Schematic illustration of a microfabricated multi-element array A comprising 32 interdigitated microsensor electrodes, and B comprising 64 independently addressable microdisc voltametric electrodes. Each device shows the large area counter electrode (middle) and the reference electrode as a band around the counter electrode...

FIGURE 12.14 Schematic of various microfabricated electrode array devices manufectured by ABTECH Scientific, Inc. (A) Interdigitated microsensor electrodes (IMEs), (B) independently addressable microband electrodes (lAMEs), (C) independently addressable interdigitated microsensor electrodes (lAlMEs), (D) microdisc electrode array (MDEA), and (E) electrochemical cell-on-a-chip MDEA (ECC MDEA 5037). 

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