Carbon nanotube arrays (CNTAs) are promising materials for a variety of applications, including thermal management, energy storage, and electronics. However, the performance of CNTAs can be limited by their high thermal resistance, which can impede heat transfer. In a new study, engineers at the University of California, Berkeley, have shown how to optimize CNTAs for use in hotspots, where heat transfer is critical.

The researchers developed a model to predict the thermal conductivity of CNTAs as a function of their geometry and material properties. They found that the thermal conductivity of CNTAs can be significantly increased by increasing the diameter of the nanotubes and the density of the array. However, they also found that the thermal conductivity decreases as the length of the nanotubes increases.

The researchers used their model to design CNTAs for use in a variety of hotspot applications, including high-power electronics, solar cells, and fuel cells. They found that CNTAs can provide a significant improvement in heat transfer over traditional materials, such as copper and aluminum.

The study provides a roadmap for the design and optimization of CNTAs for use in hotspot applications. By understanding the factors that affect the thermal conductivity of CNTAs, engineers can design materials that meet the specific requirements of their applications.

The study is published in the journal Carbon.