One-dimensional heterostructure: The selective decoration of single-walled carbon nanotube tips with metallic nanoparticles

A straightforward protocol is presented to covalently bond gold nanoparticles exclusively at the tips of single-walled carbon nanotubes. This approach exploits the sterical hindrance given by a polymer and surfactant, preventing the attachment of no functionalized gold nanoparticles onto the main nanotube body. These novel heterostructures have promising potential for applications in photonics and electronic devices. Impact statement One-dimensional structures and the straight-forward method to create them could set the stage for future fabrication of mechanically and electrically robust contact devices. The mechanical stability is essential for applying the presented one-dimensional heterojunctions as contacts in electronic devices and is of utmost importance for fabricating robust nanotube-metal composite materials. Eventually, three-dimensional metal-nanotube arrangements could be foreseen as exceptionally robust nanocomposites. Future research will evaluate multi-component systems containing several different types of structurally collaborating components (e.g., the combination of metal-semiconductor nanoparticles). The presented method may lead to the development of new composites, materials, and structures with functional properties. Graphical abstract