Short hydroxy double-walled carbon nanotubes are utilized in various advanced applications due to their unique structural and functional properties. In the field of biomedicine, they are employed as drug delivery systems, where their high surface area and functional groups enable efficient loading and targeted release of therapeutic agents. They also serve as contrast agents in medical imaging, enhancing the resolution of diagnostic techniques.

In energy storage, these nanotubes are integrated into supercapacitors and batteries to improve conductivity and energy density. Their double-walled structure provides mechanical strength and stability, making them ideal for high-performance electrodes. Additionally, they are used in composite materials to enhance mechanical, thermal, and electrical properties, benefiting industries such as aerospace and automotive.

Environmental applications include their use in water purification systems, where their adsorption capabilities help remove contaminants and heavy metals. Their functionalized surfaces also make them suitable for catalytic processes, aiding in the degradation of pollutants. Overall, their versatility and efficiency make them valuable in cutting-edge technological and industrial applications.