The scientists prepared the 3D graphene structures by self-assembly from graphene oxide using mild chemical reduction in water at 95 degrees Celsius (at atmospheric pressure) without stirring. The graphene shapes were controlled by using reactor vessels of differing shapes. The team were able to produce cylinder-, pear- and sphere-like shapes. The new materials features high electrical conductivity and high mechanical and thermal stability.
More info: http://www.rsc.org/chemistryworld/News/2011/June/23061102.asp