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Related Experiment Video

Updated: May 27, 2026

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
07:51

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

Published on: February 1, 2022

Multifunctional polydiacetylene-graphene nanohybrids for biosensor application.

Ji Sun Yun1, Kwang Suk Yang, Do Hyun Kim

  • 1Department of Chemical and Biomolecular Engineering (BK21 Program), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea.

Journal of Nanoscience and Nanotechnology
|November 30, 2011
PubMed
Summary
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This study introduces a novel graphene-based material for biosensors. The polydiacetylene/reduced graphene oxide (PDA/RGO) nanohybrids offer enhanced solubility and functionality for fluorescence and electrochemical detection in biochips.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Biochemistry

Background:

  • Graphene's unique properties are valuable for biosensing.
  • Developing water-soluble and functionalized graphene is crucial for biosensor applications.
  • Polydiacetylene (PDA) and reduced graphene oxide (RGO) offer complementary functionalities.

Purpose of the Study:

  • To develop novel polydiacetylene/reduced graphene oxide (PDA/RGO) nanohybrids for biosensor applications.
  • To investigate the self-assembly and photo-polymerization of diacetylenic monomers on RGO.
  • To evaluate the suitability of PDA/RGO nanohybrids for fluorescence and electrochemical detection in biochips.

Main Methods:

  • Non-covalent functionalization of RGO with diacetylenic monomers via self-assembly and photo-polymerization.

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Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation

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  • Characterization of PDA/RGO nanohybrids using UV-Vis, FT-IR, Raman, and photoluminescence spectroscopy.
  • Functionalization with biotin and verification of biotin-streptavidin interaction in a microfluidic biochip.

    • Main Results:

    • PDA/RGO nanohybrids exhibited good water solubility and facilitated graphene micropattern formation.
    • The nanohybrids showed potential for both fluorescence and electrochemical detection.
    • Successful demonstration of biotin-streptavidin interaction on the functionalized RGO in a microfluidic biochip.
    • Electrochemical experiments confirmed the potential for low-concentration analyte detection.

    Conclusions:

    • PDA/RGO nanohybrids are promising materials for advanced biosensing platforms.
    • The developed method enables effective functionalization of graphene for biochip integration.
    • The nanohybrids show potential for sensitive detection in both fluorescence and electrochemical biosensing applications.