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Preparation of Silicon Nanowire Field-effect Transistor for Chemical and Biosensing Applications
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ZnO nanorods array based field-effect transistor biosensor for phosphate detection.

Rafiq Ahmad1, Min-Sang Ahn1, Yoon-Bong Hahn1

  • 1School of Semiconductor and Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekjedaero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.

Journal of Colloid and Interface Science
|March 26, 2017
PubMed
Summary
This summary is machine-generated.

A novel field-effect transistor (FET) biosensor using pyruvate oxidase (PyO) and zinc oxide nanorods (ZnO NRs) offers sensitive and specific phosphate detection. This technology shows promise for practical field measurements.

Keywords:
Field-effect transistorHigh sensitivityPhosphate biosensorPyruvate oxidaseZnO nanorods

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Area of Science:

  • Materials Science
  • Biosensors
  • Nanotechnology

Background:

  • Phosphate detection is crucial for environmental monitoring and healthcare.
  • Existing biosensors often face challenges with sensitivity, specificity, and stability.
  • Field-effect transistor (FET) biosensors offer potential for sensitive analyte detection.

Purpose of the Study:

  • To develop a highly sensitive and specific FET biosensor for phosphate detection.
  • To utilize zinc oxide nanorods (ZnO NRs) for enhanced enzyme immobilization.
  • To evaluate the performance of the fabricated biosensor for practical applications.

Main Methods:

  • Fabrication of a FET biosensor using ZnO NRs grown on a SiO2/Si substrate.
  • Functionalization of ZnO NRs with pyruvate oxidase (PyO) for phosphate recognition.
  • Characterization of the biosensor's sensitivity, selectivity, stability, and reproducibility.

Main Results:

  • The PyO-functionalized ZnO NRs FET biosensor demonstrated high sensitivity (80.57μAmM⁻¹cm⁻²) for phosphate detection.
  • A wide linear detection range (0.1µM–7.0mM) was achieved under optimal conditions.
  • The biosensor exhibited minimal interference from electroactive species, good stability, and reproducibility.

Conclusions:

  • The developed FET biosensor presents a promising, sensitive, and specific method for phosphate detection.
  • The use of ZnO NRs enhances enzyme immobilization and sensor performance.
  • This approach is suitable for field measurements and environmental monitoring of phosphate.