Simple and Large-Scale Strategy to Prepare Flexible Graphene Tape Electrode

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Developing cost-effective and scalable methods for producing advanced electrode materials is crucial for widespread adoption of electrochemical sensors.
• Flexible electrodes offer advantages in portability and integration into various devices.
• Graphene's unique properties make it a promising material for electrode fabrication.

Purpose of the Study:

• To develop a simple, large-scale strategy for preparing flexible graphene tape electrodes (GTEs).
• To investigate the application of these GTEs as supporting matrices for electrochemical glucose sensing.
• To evaluate the performance of GTE-based sensors compared to existing electrode technologies.

Main Methods:

• A facile peeling method using commercial graphite foil and acrylic transparent tape to create flexible GTEs.
• Characterization of the GTE surface morphology using scanning electron microscopy, revealing a 3D porous graphene foam structure.
• Loading of Ni-Co nanoparticles (Ni-CoNPs) and glucose oxidase (GOD) onto the GTEs for electrochemical glucose sensing applications.

Main Results:

• The peeling method successfully produced flexible GTEs with a 3D porous graphene foam structure.
• Ni-CoNPs/GTE demonstrated a linear range of 0.6 μM–0.26 mM and 1.360–5.464 mM, with a detection limit of 0.16 μM.
• GOD/AuNPs-CHIT/GTE exhibited a linear range of 0.616–14.0 mM and a detection limit of 0.202 mM, comparable or superior to other modified electrodes.
• The 3D porous graphene foam adhered firmly to the acrylic tape, ensuring stability.

Conclusions:

• The developed peeling method offers a simple, scalable, and cost-effective approach to produce flexible GTEs.
• The 3D porous GTE serves as an effective supporting matrix for electrochemical applications, particularly glucose sensing.
• These flexible GTEs present a promising alternative to conventional electrodes for various electrochemical applications due to their ease of preparation and robust performance.