Modulating thermal conductance across the metal/graphene/SiO₂ interface with ion irradiation

Area of Science:

• Materials Science
• Nanotechnology
• Solid State Physics

Background:

• Increasing integration of microelectronic devices necessitates improved heat dissipation strategies.
• Efficient thermal management is critical for the performance and reliability of modern electronics.
• Interfacial thermal conductance is a key parameter in heat transfer across material junctions.

Purpose of the Study:

• To investigate an effective method for tuning heat conduction across the Al/graphene/SiO2 interface.
• To enhance the interfacial thermal conductance for better thermal management in microelectronic devices.
• To understand the underlying mechanisms responsible for improved heat transfer.

Main Methods:

• Utilizing ion irradiation to modify graphene properties.
• Analyzing interfacial thermal conductance using experimental techniques.
• Employing X-ray photoelectron spectroscopy (XPS) for surface analysis.
• Conducting density functional theory (DFT) calculations to elucidate atomic interactions.

Main Results:

• Interfacial thermal conductance of Al/irradiated graphene/SiO2 increased by a factor of 3 compared to Al/pristine graphene/SiO2.
• XPS analysis revealed the formation of C-O bonds on irradiated graphene, enhancing thermal conductance.
• DFT calculations confirmed intensified adsorption strength between Al and irradiated graphene.
• Formation of bonds between O atoms and Al atoms was observed, contributing to enhanced thermal conductance.

Conclusions:

• Ion irradiation is an effective method to significantly enhance interfacial thermal conductance.
• The formation of C-O bonds and strengthened Al-graphene adsorption are key mechanisms for improved heat transfer.
• This approach offers a promising strategy for optimizing thermal management in microelectronic applications.