Enhanced thermal transport at covalently functionalized carbon nanotube array interfaces

Area of Science:

• Materials Science
• Nanotechnology
• Thermal Engineering

Background:

• Carbon nanotubes (CNTs) exhibit exceptionally high thermal conductivity, surpassing diamond.
• Practical applications of CNTs are hindered by high thermal interface resistance (TIR) due to weak interfacial adhesion.
• This limitation affects both CNTs and related materials like graphene.

Purpose of the Study:

• To significantly reduce the thermal interface resistance between metal surfaces and vertically aligned multiwall carbon nanotube (VA-MWCNT) arrays.
• To investigate a novel method for improving interfacial adhesion in nanoscale thermal management systems.

Main Methods:

• Utilizing short, covalently bonded organic molecules to bridge the interface between metal surfaces and VA-MWCNT arrays.
• Experimentally measuring the thermal interface resistance before and after the molecular bridging treatment.

Main Results:

• Achieved a sixfold reduction in thermal interface resistance.
• Demonstrated enhanced adhesion at the metal-CNT interface through molecular bridging.
• Validated the effectiveness of the covalent bonding strategy for improving thermal transport.

Conclusions:

• Molecular bridging is a highly effective strategy for mitigating thermal interface resistance in CNT-based thermal systems.
• This approach offers a viable solution for overcoming performance limitations in practical thermal management applications.
• The findings have significant implications for advancing thermal transport in nanotechnology and electronics, including graphene-based devices.