CO₂ and UV Laser-Induced Graphene Based on Polymer Transformation: Advanced Characterizations by 2D Raman Mapping...

Area of Science:

• Materials Science
• Nanotechnology
• Laser Processing

Background:

• Laser-induced graphene (LIG) is a promising graphene production technique due to its convenience and cost-effectiveness.
• Polyimide is a common substrate for LIG fabrication.
• Understanding the structural differences between LIG produced by various lasers is crucial for optimizing its applications.

Purpose of the Study:

• To analyze and compare the structural characteristics of LIG produced from polyimide using UV and CO2 laser irradiation.
• To evaluate the patterning resolution and penetration depth for both UV and CO2 laser-induced graphene.
• To provide insights into the trade-offs between structural order and patterning capabilities of different LIG methods.

Main Methods:

• Surface scanning Raman spectroscopy was employed to characterize the graphene structures.
• Microscopy techniques were utilized in conjunction with Raman spectroscopy.
• Comparative analysis of LIG produced by UV and CO2 laser irradiation from polyimide.

Main Results:

• UV laser irradiation resulted in LIG with a less ordered structure compared to CO2 laser irradiation.
• UV LIG exhibited a higher patterning resolution than CO2 LIG.
• UV LIG demonstrated a significantly smaller penetration depth into the polyimide substrate.

Conclusions:

• UV laser irradiation offers superior patterning resolution for LIG fabrication on polyimide.
• The choice between UV and CO2 laser irradiation depends on the desired balance between structural order and resolution.
• UV LIG's reduced penetration depth could be advantageous for specific microelectronic and sensing applications.