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Related Experiment Video

Updated: Dec 24, 2025

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Protein recognition on a single graphene oxide surface fixed on a solid support.

Kazuaki Furukawa1, Yuko Ueno, Emi Tamechika

  • 1NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan. furukawa.kazuaki@lab.ntt.co.jp.

Journal of Materials Chemistry. B
|April 9, 2020
PubMed
Summary
This summary is machine-generated.

We developed a graphene oxide surface for label-free thrombin detection. This aptamer-based system recovers fluorescence upon protein recognition, showing homogeneous binding and microchannel compatibility.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Analytical Chemistry

Background:

  • Graphene oxide (GO) offers unique properties for biosensing.
  • Developing selective and sensitive protein detection methods is crucial.
  • Existing methods often require labels, complicating detection.

Purpose of the Study:

  • To create a label-free biosensor for protein recognition using graphene oxide.
  • To investigate the mechanism of protein binding on a modified GO surface.
  • To demonstrate the system's applicability in microfluidic devices.

Main Methods:

  • Surface modification of graphene oxide with pyrene linkers, aptamers, and fluorescent probes.
  • Utilizing fluorescence quenching and recovery for signal transduction.
  • Employing confocal laser scanning microscopy and atomic force microscopy for direct observation.

Main Results:

  • Demonstrated label-free and selective recognition of thrombin.
  • Observed homogeneous protein recognition on the modified GO surface.
  • Successfully integrated the system into microchannel devices for operation.

Conclusions:

  • The developed GO-based system enables efficient and selective protein detection.
  • Direct visualization confirms homogeneous protein binding events.
  • The system is suitable for integration into microfluidic platforms for practical applications.