Chemists break world record to build tightest knot ever made
By linking 192 atoms in a chain with eight crossings, University of Manchester chemists have produced the most tightly knotted structure created till date. The tightness of a knot is defined by the distance between points where the chain of atoms cross each other. The breakthrough knot is only about 20 nanometres long, and was made using the 'self-assembly' technique.