Versarien plc announced the appointments of Dr Denis Koltsov and Dr Martin Kemp to strengthen its graphene technology team, with a particular focus on quality assurance. Both Dr Kemp and Dr Kolsov are at the forefront of developing the international standards that will define graphene and other nanomaterials. Dr Denis Koltsov is Chair of ISO TC 229 Nanotechnology Standards Group at ISO (International Organization for Standardization). Dr Martin Kemp is Chairman of the Nanomaterials Committee of the Institute of Materials, Minerals and Mining (IOM3).