Bio-functionalized graphene-graphene oxide nanocomposite based electrochemical immunosensing

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Graphene-based nanomaterials offer unique electronic and chemical properties for sensor development.
• Graphene oxide (GO) provides facile chemical functionality for bio-interface development.
• Screen-printed electrodes (SPEs) are cost-effective platforms for portable electrochemical sensors.

Purpose of the Study:

• To develop a novel in-situ electrochemical synthesis for functionalized graphene-graphene oxide (fG-GO) nanocomposites on SPEs.
• To characterize the fG-GO nanocomposite and evaluate its performance in an immunosensor.
• To demonstrate the potential for ultra-sensitive detection of target analytes.

Main Methods:

• In-situ electrochemical synthesis of fG-GO nanocomposite on SPEs.
• Characterization using transmission electron microscopy (TEM), Raman spectroscopy, FTIR, TGA, and XRD.
• Fabrication of a competitive inhibition immunoassay for diuron detection.

Main Results:

• Successful electrochemical formation and characterization of the fG-GO nanocomposite.
• The fG-GO nanocomposite on SPE exhibited synergistic electrical and chemical properties.
• The immunosensor demonstrated significantly enhanced electrochemical signal response for diuron detection.

Conclusions:

• The novel electrochemical synthesis provides an efficient method for creating fG-GO nanocomposites on SPEs.
• The fG-GO nanocomposite enhances immunosensor performance, offering improved sensitivity.
• This approach holds promise for the ultra-sensitive detection of various target analytes.