Space irradiation-induced damage to graphene films

Area of Science:

• Materials Science
• Aerospace Engineering
• Nanotechnology

Background:

• Graphene possesses exceptional properties, making it suitable for space applications.
• Space environments expose materials to harsh conditions like high-energy particle irradiation.
• Understanding graphene's response to such environments is crucial for its space utilization.

Purpose of the Study:

• To investigate the effects of simulated space irradiation on graphene films.
• To analyze structural and property changes in single-layer and multi-layer graphene under atomic oxygen, electron, and proton irradiation.

Main Methods:

• Exposure of large-area single-layer and multi-layer graphene films to simulated space irradiation.
• Simulated irradiation included atomic oxygen (AO), electron (EL), and proton (PR).
• Analysis of structural integrity and property changes post-irradiation.

Main Results:

• Atomic oxygen (AO) degraded graphene by reacting with carbon atoms.
• High-energy proton (PR) irradiation induced polymorphic atomic defects.
• Electron (EL) irradiation caused minimal damage due to graphene's high conductivity.
• Irradiation disrupted graphene ripples, altering structure and properties via thermodynamic stability.

Conclusions:

• Graphene's response to space irradiation is dependent on the type of radiation.
• Electron irradiation is least damaging, while AO and protons pose significant risks.
• Structural changes, including ripple disruption, affect graphene's physical and mechanical properties.
• Graphene's suitability for space applications requires careful consideration of radiation effects.