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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...
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Related Experiment Video

Updated: May 24, 2026

Fabrication of a Solution-gated Indium-Tin-Oxide-based One-piece Transistor Enabling Sensitive Biosensing
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Ion-sensitive field-effect transistor for biological sensing.

Chang-Soo Lee1, Sang Kyu Kim, Moonil Kim

  • 1BioNanotechnology Research Center (BNRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-333, Korea; E-Mail: cslee@kribb.re.kr (C.-S.L.); tech81@hanmail.net (S.K.K.).

Sensors (Basel, Switzerland)
|March 17, 2012
PubMed
Summary

Ion-sensitive field-effect transistors (ISFETs) offer highly sensitive electrical biosensing. This review highlights recent advances, applications, and challenges in ISFET biosensor development for biomolecule detection.

Keywords:
ISFETbiomoleculesbiosensorion-sensitive field-effect transistor

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Area of Science:

  • Electrical Engineering
  • Biotechnology
  • Nanotechnology

Background:

  • Field-effect transistors (FETs) are increasingly used for sensitive biological detection.
  • Ion-sensitive field-effect transistors (ISFETs) represent a key advancement in electrical biosensing.
  • ISFETs offer a promising platform for label-free detection of various biomolecules.

Purpose of the Study:

  • To review recent progress in FET-type biosensors, focusing on ISFETs.
  • To explore the application prospects of ISFET-based biosensors.
  • To discuss challenges and approaches in developing ISFET biosensors for biomolecule analysis.

Main Methods:

  • Literature review of recent advances in ISFET biosensor technology.
  • Analysis of current applications and future potential of ISFETs in biosensing.
  • Discussion of technical challenges and innovative solutions in the field.

Main Results:

  • Significant progress has been made in enhancing the sensitivity of FET-type biosensors.
  • ISFETs demonstrate considerable potential for detecting DNA, proteins, enzymes, and cells.
  • Key challenges include improving stability, selectivity, and integration for practical applications.

Conclusions:

  • ISFETs are a powerful tool for sensitive and reliable electrical biosensing.
  • Further research and development are needed to overcome existing challenges and expand ISFET applications.
  • This review aims to foster broader interest in ISFET-based biosensor development.