Electrochemical sensor based on CuSe for determination of dopamine

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Dopamine detection is crucial for understanding neurodegenerative diseases.
• Existing electrochemical sensors often face challenges with sensitivity, selectivity, and detection limits.
• Development of novel, efficient, and cost-effective sensing materials is essential.

Purpose of the Study:

• To investigate copper selenide (CuSe) nanostructures as an electrochemical sensor for dopamine detection.
• To evaluate the sensitivity, selectivity, and limit of detection (LOD) of the CuSe-based sensor.
• To explore the underlying mechanisms for enhanced dopamine sensing performance.

Main Methods:

• Hydrothermal synthesis and electrodeposition of CuSe nanostructures.
• Electrochemical characterization using cyclic voltammetry and amperometry.
• Testing selectivity against common interferents like ascorbic and uric acids.

Main Results:

• Achieved high sensitivity (26 μA/μM·cm²) and a low LOD for dopamine.
• Dopamine oxidation occurred at a low applied potential (< 0.18 V vs Ag|AgCl), enhancing selectivity.
• Demonstrated improved conductivity and charge transfer due to copper presence.

Conclusions:

• CuSe nanostructures represent a highly sensitive and selective electrochemical sensor for dopamine.
• The sensor's performance is attributed to the redox tunability and coordination of Cu centers.
• This earth-abundant material offers a significant advancement for developing efficient dopamine sensors, potentially aiding neurodegenerative disease research.