Copper Nanoparticles for Ascorbic Acid Sensing in Water on Carbon Screen-printed Electrodes

Area of Science:

• Electrochemistry
• Nanomaterials Science
• Analytical Chemistry

Background:

• Electrochemical sensors are crucial for analyte detection.
• Developing cost-effective and sensitive electrodes is an ongoing challenge.

Purpose of the Study:

• To develop a modified electrode for ascorbic acid detection.
• To investigate the electrochemical properties of copper nanoparticles on a carbon screen-printed electrode.

Main Methods:

• Pulsed laser ablation of copper in ethanol to synthesize copper nanoparticles.
• Modification of carbon screen-printed electrodes with copper nanoparticles.
• Electrochemical analysis using linear sweep voltammetry, cyclic voltammetry, and amperometry.

Main Results:

• The modified electrode showed a clear anodic peak for ascorbic acid oxidation.
• A linear relationship was observed between signal intensity and ascorbic acid concentration (1–250 μM).
• A low detection limit of 0.5 μM was achieved, with good selectivity over glucose.

Conclusions:

• The copper nanoparticle-modified electrode offers a sensitive, selective, and cost-effective platform for ascorbic acid detection.
• The electrode's disposable nature and simple modification procedure make it suitable for practical applications.