Short hydroxy single-walled carbon nanotubes are widely used in biomedical applications due to their unique properties. They serve as effective drug delivery systems, enabling targeted and controlled release of therapeutic agents. Their high surface area and functional groups allow for efficient loading of drugs, while their biocompatibility ensures minimal adverse effects. Additionally, they are employed in tissue engineering, where they enhance the mechanical strength and conductivity of scaffolds, promoting cell growth and regeneration. In biosensing, these nanotubes are utilized for their exceptional electrical conductivity and sensitivity, enabling the detection of biomolecules at very low concentrations. Their application in cancer therapy is also notable, as they can be used for photothermal ablation, where they absorb near-infrared light to generate heat and destroy cancer cells.