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Related Experiment Video

Updated: Apr 4, 2026

Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition
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A highly efficient urea detection using flower-like zinc oxide nanostructures.

Manvi Tak1, Vinay Gupta1, Monika Tomar2

  • 1Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India.

Materials Science & Engineering. C, Materials for Biological Applications
|September 11, 2015
PubMed
Summary

Flower-like zinc oxide nanostructures (ZnONF) were used to create a novel urea biosensor. This biosensor demonstrates high sensitivity and a fast response time for detecting urea, showing promise for future applications.

Keywords:
BiosensorFlower-like nanostructuresHydrothermal methodUreaZinc oxide

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biosensors

Background:

  • Development of sensitive and efficient biosensors is crucial for various applications.
  • Zinc oxide nanostructures offer unique properties for biosensor development.

Purpose of the Study:

  • To fabricate a novel urea biosensor using flower-like zinc oxide nanostructures (ZnONF).
  • To evaluate the performance of the developed biosensor for urea detection.

Main Methods:

  • Hydrothermal synthesis of flower-like zinc oxide nanostructures.
  • Immobilization of urease (Urs) onto the ZnONF matrix on a platinized silicon substrate.
  • Characterization using scanning electron microscopy (SEM) and X-ray diffraction (XRD).
  • Amperometric detection of urea.

Main Results:

  • The fabricated biosensor (Urs/ZnONF/Pt/Ti/Si) showed a linear response to urea from 1.65 mM to 16.50 mM.
  • Enhanced sensitivity of ~132 μA/mM/cm(2) and a rapid response time of 4s were achieved.
  • A low Michaelis-Menten constant (Km) of 0.19 mM indicated high affinity of immobilized urease for urea.

Conclusions:

  • Flower-like ZnO nanostructures provide a promising matrix for efficient amperometric urea biosensors.
  • The developed biosensor exhibits enhanced response characteristics for urea detection.
  • ZnONF matrix facilitates high affinity immobilization of urease, leading to improved biosensor performance.