World Cup wonders: nano-scale footballs made by masters of the minuscule

How are experts at the University of Nottingham's Nanoscale and Microscale Research Centre (nmRC) and 3D printing experts in the Centre for Additive Manufacturing (CfAM) marking the World Cup? These chemists, engineers and specialist technicians have created a set of nanoscale football shaped structures in the style of a Russian Doll - one inside the other.