A hair's breadth away from disaster

The phrase 'critical moment' originally referred to the weight of a thousand tons being tied to one thread, but carbon nanotubes, with their outstanding high strength, have become 'super filaments' capable of carrying a thousand tons. As a one-dimensional quantum material with a unique structure, carbon nanotubes are composed of carbon atoms arranged in a hexagonal pattern, forming coaxial circular tube structures with several to dozens of layers. Its density is only 1/6 of steel, but its tensile strength per unit mass is over 400 times that of steel, making it widely used in fields such as transparent conductive films, electronic devices, and hydrogen storage materials.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

(1) Wire strength is a discipline in materials science, rooted in fundamental scientific principles. The microscopic arrangement and bonding mechanism of carbon nanotubes endow them with outstanding performance as the finest and strongest known wires to date. (2) The structure of carbon nanotubes is a seamless tubular structure formed by sp hybridization of carbon atoms, which are arranged in hexagonal or pentagonal shapes, similar to the curled shape of graphene. According to the different arrangements of carbon atoms, carbon nanotubes can be divided into single-walled carbon nanotubes (SWCNTs) and multi walled carbon nanotubes (MWCNTs). Single walled carbon nanotubes are composed of a single layer of carbon atoms, while multi walled carbon nanotubes are composed of multiple layers of concentric carbon nanotubes, each connected to each other by van der Waals forces. The chirality of carbon nanotubes is determined by their curling direction and can be described by a pair (n, m), where n and m are integers that determine the helical shape of carbon nanotubes. Different chirality can lead to carbon nanoparticles.