Developments in Nanopatterning of Graphene; Toward Direct Writing

Area of Science:

• Materials Science
• Nanotechnology
• Electronics Engineering

Background:

• Graphene's unique properties make it crucial for next-generation nanoelectronics.
• Conventional lithography for graphene patterning faces challenges like contamination and scalability.

Purpose of the Study:

• To review and analyze direct-write graphene technologies for advanced nanofabrication.
• To explore mechanisms, limitations, and future directions in direct-write graphene patterning.

Main Methods:

• Focused electron beam-induced deposition (FEBID)
• Polymer-to-graphene (P2G) conversion
• Focused ion beam (FIB) modification
• Laser-assisted graphitisation

Main Results:

• Direct-write methods enable bottom-up, spatially resolved graphene patterning without masks.
• Physicochemical mechanisms of electron- and photon-mediated graphitisation are detailed.
• Limitations include partial graphitisation and resolution fidelity.

Conclusions:

• Direct-write techniques hold transformative potential for scalable, high-fidelity graphene devices.
• Future advancements require in situ processing, advanced beam control, and optimized precursors.
• This review provides a foundation for designing next-generation nanofabrication protocols.