Rupture of amorphous graphene via void formation

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Graphene's applications often leverage its mechanical and structural properties.
• Understanding voids in amorphous graphene is crucial for its mechanical behavior.

Purpose of the Study:

• To numerically and analytically study void energetics in amorphous graphene.
• To investigate the relationship between line tension, area gain, and void formation.
• To explore the influence of pressure and shear modulus on void critical radius.

Main Methods:

• Classical nucleation theory applied to void formation.
• Numerical and analytical modeling of amorphous graphene.
• Calculation of critical void radius under constant pressure.

Main Results:

• Void energetics are determined by a balance between line tension cost and area gain.
• Critical void radius is the ratio of line tension to applied pressure.
• Shear modulus sets a lower limit for line tension in amorphous graphene.

Conclusions:

• The study provides insights into void formation in amorphous graphene and similar 2D materials.
• Results are relevant for strain engineering and "straintronics" applications.
• Findings advance the understanding of polycrystalline graphene under tension.