Laser-Driven Modular Precision Chemistry of Graphene Using λ³-Iodanes

Area of Science:

• Materials Science
• Nanotechnology
• Organic Chemistry

Background:

• Laser writing offers an efficient route for two-dimensional (2D) graphene patterning.
• Current methods are limited by a scarcity of suitable reagents for covalent functionalization.

Purpose of the Study:

• To introduce a versatile approach for covalent laser patterning of graphene.
• To overcome the limitations of existing methods by employing novel reagents.

Main Methods:

• Utilized trivalent organic iodine compounds as reagents for laser-induced covalent patterning.
• Exploited laser-induced cleavage of iodine-centered bonds to generate localized radicals.
• Facilitated in situ radical binding to the graphene surface for 2D-structuring.

Main Results:

• Successfully engraved a diverse library of functionalities onto graphene surfaces.
• Demonstrated the ability to tailor surface properties by attaching functional moieties with varying electrical characteristics.
• Showcased thermally reversible binding, enabling programmable surface property adjustments.

Conclusions:

• The developed method provides a versatile and effective strategy for covalent laser patterning of graphene.
• This approach expands the scope of functional groups that can be patterned onto graphene via laser writing.
• The ability to program surface properties offers new possibilities for advanced graphene-based materials.