the sharpest-pointiest thing in the world is a nanotube of carbon known as a single-walled carbon nanotube (SWCNT). Carbon nanotubes are cylindrical structures composed of carbon atoms arranged in a hexagonal lattice pattern. They have an incredibly small diameter, on the nanometer scale, while their length can vary.
The sharpness of a carbon nanotube is attributed to its atomic structure. Carbon nanotubes have a high aspect ratio, meaning their length is much greater than their diameter. This elongated shape, combined with the strength of carbon-carbon bonds, allows them to have incredibly sharp ends or tips. The tip of a carbon nanotube can be just a single atom wide, making it extremely sharp at the nanoscale.
It's important to note that research in materials science and nanotechnology is constantly evolving, and there may be new discoveries or advancementsthat could potentially challenge or surpass the sharpness of carbon nanotubes.