Electrocatalytic CuBr@CuO nanoparticles based salivary glucose probes

Area of Science:

• Nanomaterials Science
• Electrochemistry
• Biosensing

Background:

• Developing sensitive and reliable glucose detection methods is crucial for diabetes management.
• Noninvasive glucose monitoring offers a less painful alternative to traditional blood glucose testing.

Purpose of the Study:

• To fabricate highly electrocatalytic cuprous halide/copper oxide nanoparticles (CuX@Cu_nO NPs) on copper foils for sensitive glucose detection.
• To investigate the electrochemical properties and potential of these nanoparticles for noninvasive glucose monitoring.

Main Methods:

• Fabrication of CuX@Cu_nO NPs via in situ electrochemical deposition and conversion.
• Electrochemical characterization of the synthesized nanoparticles for glucose oxidation.
• Validation of the electrode's performance using saliva samples and comparison with a commercial blood glucose meter.

Main Results:

• CuBr@CuO NPs exhibited enhanced electrocatalytic activity for glucose oxidation at a low overpotential (0.25 V vs. SCE).
• A wide linear detection range (5.0 μM to 3.51 mM) with high linearity (R² = 0.995) was achieved.
• Saliva glucose detection correlated well with blood glucose levels, demonstrating reliability.

Conclusions:

• The developed CuBr@CuO NP electrode is highly effective for sensitive glucose detection.
• This technology holds significant promise for future noninvasive glucose monitoring in individuals with diabetes.