A general route towards defect and pore engineering in graphene.

Area of Science:

• Materials Science
• Nanotechnology
• Surface Science

Background:

• Defect engineering is crucial for customizing graphene's properties.
• Graphene's unique characteristics make it suitable for applications like porous membranes and ultra-capacitors.

Purpose of the Study:

• To present a general method for defect and pore engineering in graphene.
• To demonstrate control over defect density and nanopore size.

Main Methods:

• Utilizing remote plasma treatments, specifically oxygen plasma irradiation.
• Employing hydrogen plasma anisotropic etching to enlarge defects into nanopores.

Main Results:

• Homogeneous defects in graphene were created with controllable densities (few to ≈10^3 μm⁻²).
• Defects were successfully enlarged into nanopores with sizes of a few nm and above.
• The smallest fabricated nanopores were approximately 2 nm in size.

Conclusions:

• Remote plasma treatment offers a versatile route for graphene defect and pore engineering.
• This technique enables the fabrication of ultra-small graphene nanopores.
• The controlled modification of graphene structures opens possibilities for novel applications.