Diamond-Graphene Composite Nanostructures

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 di...

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Bibliographic Details
Published in:Nano letters Vol. 20; no. 5; pp. 3611 - 3619
Main Authors: Németh, Péter, McColl, Kit, Smith, Rachael L, Murri, Mara, Garvie, Laurence A. J, Alvaro, Matteo, Pécz, Béla, Jones, Adrian P, Corà, Furio, Salzmann, Christoph G, McMillan, Paul F
Format: Journal Article
Language:English
Published: United States American Chemical Society 13.05.2020
Subjects:
Letter
density functional theory calculations
Graphene-diamond nanocomposite
high-resolution TEM
sp2- and sp3-bonded nanomaterials
mechanical properties
ISSN:1530-6984, 1530-6992, 1530-6992
Online Access:Get full text
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Summary: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 sp3 and sp2 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 sp3- and sp2-bonded nanodomains.
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ISSN:1530-6984
1530-6992
1530-6992
DOI:10.1021/acs.nanolett.0c00556