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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...
Amperometry: Overview01:10

Amperometry: Overview

Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
Potentiometry: Membrane Electrodes01:15

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...

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Related Experiment Video

Updated: May 9, 2026

Dry Film Photoresist-based Electrochemical Microfluidic Biosensor Platform: Device Fabrication, On-chip Assay Preparation, and System Operation
13:42

Dry Film Photoresist-based Electrochemical Microfluidic Biosensor Platform: Device Fabrication, On-chip Assay Preparation, and System Operation

Published on: September 19, 2017

Amperometric electrochemical microsystem for a miniaturized protein biosensor array.

Chao Yang, Yue Huang, B L Hassler

    IEEE Transactions on Biomedical Circuits and Systems
    |July 16, 2013
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a novel microsystem for simultaneous protein-based biosensing using an on-chip amperometric readout. The platform enables high-sensitivity, low-cost protein detection for miniaturized sensor arrays.

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    Area of Science:

    • Bioengineering
    • Electrical Engineering
    • Materials Science

    Background:

    • Protein-based bioelectrochemical interfaces are crucial for developing advanced biosensors.
    • Existing platforms often lack simultaneous interrogation capabilities and miniaturization.

    Purpose of the Study:

    • To introduce a microsystem platform for simultaneous interrogation of multiple bioelectrochemical interfaces.
    • To develop an on-chip amperometric readout system for protein-based sensor arrays.

    Main Methods:

    • Utilized a post-complementary metal-oxide semiconductor (CMOS) fabrication process for planar electrode arrays.
    • Integrated a compact potentiostat with a wide input current range onto a 0.5-µm CMOS chip.
    • Characterized the prototype sensor platform using cyclic voltammetry.

    Main Results:

    • Demonstrated simultaneous interrogation of multiple bioelectrochemical interfaces.
    • Verified system functionality through a linear relationship between oxidation peak values and analyte concentrations.
    • Achieved operation from a 5-V supply at 0.6 mA on a 2.3 x 2.2-mm chip.

    Conclusions:

    • The developed microsystem platform shows significant potential for high-sensitivity, low-cost, on-chip protein-based sensor arrays.
    • Enables rapid detection and continuous monitoring applications.
    • Paves the way for miniaturized, multi-analyte sensing systems.