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NiO Nanoflowers for Non-Enzymatic Amperometric Detection of Glucose
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Reusable glucose sensing using carbon nanotube-based self-assembly.

Tamoghna Bhattacharyya1, Sarbani Samaddar, Anjan Kr Dasgupta

  • 1Department of Biochemistry, University of Calcutta, Kolkata-700019, India. adbioc@caluniv.ac.in.

Nanoscale
|August 14, 2013
PubMed
Summary

Lipid-functionalized carbon nanotubes form reusable super-micelles for trapping enzymes. This novel approach enables robust glucose sensing with enhanced enzyme stability and reusability.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Biochemistry

Background:

  • Enzyme immobilization is crucial for biosensor development.
  • Traditional methods often lead to enzyme denaturation and reduced activity.
  • Developing stable and reusable enzyme immobilization techniques is essential.

Purpose of the Study:

  • To develop a novel self-assembly method for enzyme immobilization using lipid-functionalized single-walled carbon nanotubes.
  • To create a reusable molecular trap for glucose oxidase for enhanced glucose sensing.
  • To investigate the impact of this immobilization technique on enzyme thermostability.

Main Methods:

  • Synthesis of lipid-functionalized single-walled carbon nanotubes.
  • Self-assembly of nanotubes into super-micellar structures.
  • Immobilization of glucose oxidase within the super-micellar cargo.
  • Characterization of the self-assembled structure and enzyme activity.
  • Assessment of enzyme reusability and thermostability.

Main Results:

  • Lipid-functionalized single-walled carbon nanotubes self-assembled into stable super-micellar structures.
  • Glucose oxidase was successfully trapped within the super-micelles, forming a reusable molecular cargo.
  • The soft-immobilization method demonstrated enhanced enzyme thermostability due to the hydrophobic environment.
  • Both the nanotube structure and the entrapped enzyme exhibited excellent reusability and rechargeability.

Conclusions:

  • Lipid-functionalized single-walled carbon nanotubes provide a versatile platform for creating reusable enzyme-based biosensors.
  • The super-micellar structure offers a novel approach for soft-immobilization, enhancing enzyme stability and reusability.
  • This method represents a significant advancement in enzyme immobilization for applications in glucose sensing and beyond.