Application of Polydopamine Functionalized Zinc Oxide for Glucose Biosensor Design

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Zinc oxide (ZnO) nanostructures are key components in optical and biosensors.
• Polymer functionalization, specifically with polydopamine (PDA), can tailor ZnO's optical properties for enhanced sensor performance.
• PDA's biocompatibility makes it ideal for biosensor applications.

Purpose of the Study:

• To develop a novel photo-electrochemical biosensor for glucose detection.
• To functionalize ZnO nanorods with PDA and immobilize glucose oxidase (GOx).
• To evaluate the performance of the fabricated ZnO-PDA/GOx biosensor.

Main Methods:

• Growth of ZnO nanorods on glass/ITO electrodes.
• Deposition of PDA coating on ZnO nanorods.
• Immobilization of glucose oxidase (GOx) using glutaraldehyde crosslinking.
• Characterization using SEM, TEM, and FTIR spectroscopy.
• Photo-electrochemical determination of glucose via cyclic voltammetry and amperometry.

Main Results:

• Successful fabrication of the glass/ITO/ZnO-PDA/GOx structure.
• Demonstrated photo-electrochemical determination of glucose in aqueous solutions.
• Enhanced photo-electrochemical performance of ZnO nanorods due to PDA modification.

Conclusions:

• The ZnO-PDA composite enhances the photo-electrochemical properties of ZnO nanorods.
• The developed ZnO-PDA/GOx biosensor is well-suited for sensitive glucose detection.
• This approach offers a promising platform for designing advanced photo-electrochemical sensors and biosensors.