Diamond-Graphene Composite Nanostructures Péter Németh Kit McColl Rachael L. Smith Mara Murri Laurence A. J. Garvie Matteo Alvaro Béla Pécz Adrian P. Jones Furio Corà Christoph G. Salzmann Paul F. McMillan 10.1021/acs.nanolett.0c00556.ls01 https://acs.figshare.com/articles/online_resource/Diamond-Graphene_Composite_Nanostructures/12213755 The search for new nanostructural topologies composed of elemental carbon is driven by technological opportunities as well as the need to understand the structure and evolution of carbon materials formed by planetary shock impact events and in laboratory syntheses. We describe two new families of diamond-graphene (diaphite) phases constructed from layered and bonded sp<sup>3</sup> and sp<sup>2</sup> nanostructural units and provide a framework for classifying the members of this new class of materials. The nanocomposite structures are identified within both natural impact diamonds and laboratory-shocked samples and possess diffraction features that have previously been assigned to lonsdaleite and postgraphite phases. The diaphite nanocomposites represent a new class of high-performance carbon materials that are predicted to combine the superhard qualities of diamond with high fracture toughness and ductility enabled by the graphitic units and the atomically defined interfaces between the sp<sup>3</sup>- and sp<sup>2</sup>-bonded nanodomains. 2020-04-29 13:10:37 phase diaphite shock impact events nanocomposite sp 2 nanostructural units carbon materials Diamond-Graphene Composite Nanostructures sp 3