What is one of the main uses of carbon nanotubes in technology?

One of the main uses of carbon nanotubes in technology is their ability to strengthen materials while minimizing weight. Carbon nanotubes possess exceptional mechanical properties, including high tensile strength, which allows them to reinforce various materials without significantly adding to their weight. This unique characteristic makes carbon nanotubes highly desirable in applications such as aerospace, automotive industries, and construction, where both strength and weight are critical factors. For instance, incorporating carbon nanotubes into composites can result in materials that are lighter yet stronger than traditional material combinations, thereby improving the performance and efficiency of the final product.

While the other options describe important aspects of materials and electrical properties, they do not highlight the primary application of carbon nanotubes as effectively as the option about strengthening materials.