Laser-Induced Molybdenum Carbide-Graphene Composites for 3D Foldable Paper Electronics

Area of Science:

• Materials Science
• Nanotechnology
• Electronics Engineering

Background:

• Developing cost-effective and versatile manufacturing for paper electronics is crucial.
• Existing methods often lack scalability or material versatility for advanced applications.

Purpose of the Study:

• To establish a direct-write laser patterning process for creating conductive molybdenum carbide-graphene (MCG) composites on paper.
• To demonstrate the mechanical stability and electrochemical activity of these novel MCG composites for various electronic applications.

Main Methods:

• Fibrous paper was soaked in gelatin-mediated inks containing molybdenum ions.
• A direct-write laser patterning process was employed to convert the soaked paper into hierarchically porous MCG structures.
• Mechanical deformation tests (750 cycles of 180° folding) and electrochemical analyses were performed.

Main Results:

• Conductive MCG composites were successfully fabricated directly on paper substrates.
• The resulting composites exhibited excellent mechanical stability, with electrical conductivity showing less than 5% degradation after repeated folding.
• The MCG composites demonstrated electrochemical activity, indicating potential for sensor and energy storage applications.

Conclusions:

• The direct laser conversion technique offers a scalable and low-cost approach for manufacturing paper-based electronics.
• The mechanically robust and electrochemically active MCG composites are suitable for diverse applications, including flexible sensors, energy harvesters, and supercapacitors.
• This method is compatible with complex structures like 3D origami, expanding possibilities for paper electronic devices.