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Questions and Answers
Impedimetric biosensors use a three-electrode measurement system.
Impedimetric biosensors use a three-electrode measurement system.
False
Electrical impedance (EI) measurement requires a front-end potentiostat.
Electrical impedance (EI) measurement requires a front-end potentiostat.
False
Electrochemical impedance (ECI) involves using a pair of electrodes: working electrode (WE) and counter electrode (CE).
Electrochemical impedance (ECI) involves using a pair of electrodes: working electrode (WE) and counter electrode (CE).
True
The reference electrode (RE) in electrochemical impedance contributes the full-cell potential.
The reference electrode (RE) in electrochemical impedance contributes the full-cell potential.
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The schematic setup for the measurement of EI and ECI is shown on the left in the text.
The schematic setup for the measurement of EI and ECI is shown on the left in the text.
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Interdigitated microsensor electrode array is commonly used in electrical biosensors.
Interdigitated microsensor electrode array is commonly used in electrical biosensors.
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Impedance spectroscopy is a technique that can be used to extract information from EIS measurements.
Impedance spectroscopy is a technique that can be used to extract information from EIS measurements.
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The X-axis of a Nyquist plot represents the imaginary part in EIS measurements.
The X-axis of a Nyquist plot represents the imaginary part in EIS measurements.
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Each point on a Nyquist plot corresponds to impedance at multiple frequencies.
Each point on a Nyquist plot corresponds to impedance at multiple frequencies.
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The semicircle in an RC circuital model indicates multiple time constants.
The semicircle in an RC circuital model indicates multiple time constants.
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The capacitor in an RC circuital model represents the charge transfer resistance.
The capacitor in an RC circuital model represents the charge transfer resistance.
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Electrical biosensors focus on detecting electrical signals from cells and tissues.
Electrical biosensors focus on detecting electrical signals from cells and tissues.
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Impedimetric biosensors are only used for detecting antibodies in the blood circulation.
Impedimetric biosensors are only used for detecting antibodies in the blood circulation.
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Interdigitated microsensor electrode arrays are fabricated using lithographic techniques.
Interdigitated microsensor electrode arrays are fabricated using lithographic techniques.
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Microlithographically fabricated electrodes are typically less sensitive than electrodes made using other methods.
Microlithographically fabricated electrodes are typically less sensitive than electrodes made using other methods.
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Electrical biosensors rely on impedance changes for detection.
Electrical biosensors rely on impedance changes for detection.
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Electrochemical biosensors primarily use optical signals for detection purposes.
Electrochemical biosensors primarily use optical signals for detection purposes.
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Impedimetric biosensors work by measuring the resistance of a material to an electrical current.
Impedimetric biosensors work by measuring the resistance of a material to an electrical current.
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