{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Yang X"],"funding":["MOST | National Natural Science Foundation of China (NSFC)","MOST | National Natural Science Foundation of China"],"pagination":["e2316580121"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10907318"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["121(9)"],"pubmed_abstract":["Achieving high-performance materials with superior mechanical properties and electrical conductivity, especially in large-sized bulk forms, has always been the goal. However, it remains a grand challenge due to the inherent trade-off between these properties. Herein, by employing nanodiamonds as precursors, centimeter-sized diamond/graphene composites were synthesized under moderate pressure and temperature conditions (12 GPa and 1,300 to 1,500 °C), and the composites consisted of ultrafine diamond grains and few-layer graphene domains interconnected through covalently bonded interfaces. The composites exhibit a remarkable electrical conductivity of 2.0 × 10<sup>4</sup> S m<sup>-1</sup> at room temperature, a Vickers hardness of up to ~55.8 GPa, and a toughness of 10.8 to 19.8 MPa m<sup>1/2</sup>. Theoretical calculations indicate that the transformation energy barrier for the graphitization of diamond surface is lower than that for diamond growth directly from conventional <i>sp<sup>2</sup></i> carbon materials, allowing the synthesis of such diamond composites under mild conditions. The above results pave the way for realizing large-sized diamond-based materials with ultrahigh electrical conductivity and superior mechanical properties simultaneously under moderate synthesis conditions, which will facilitate their large-scale applications in a variety of fields."],"journal":["Proceedings of the National Academy of Sciences of the United States of America"],"pubmed_title":["Centimeter-sized diamond composites with high electrical conductivity and hardness."],"pmcid":["PMC10907318"],"funding_grant_id":["62271450 6227011044","12174348 12374016","62027816"],"pubmed_authors":["Yang X","Ren X","Cheng S","Li X","Ma S","Zang J","Li S","Zhang Z","Zhang Y","Liu B","Shan C","Zhao X"],"additional_accession":[]},"is_claimable":false,"name":"Centimeter-sized diamond composites with high electrical conductivity and hardness.","description":"Achieving high-performance materials with superior mechanical properties and electrical conductivity, especially in large-sized bulk forms, has always been the goal. However, it remains a grand challenge due to the inherent trade-off between these properties. Herein, by employing nanodiamonds as precursors, centimeter-sized diamond/graphene composites were synthesized under moderate pressure and temperature conditions (12 GPa and 1,300 to 1,500 °C), and the composites consisted of ultrafine diamond grains and few-layer graphene domains interconnected through covalently bonded interfaces. The composites exhibit a remarkable electrical conductivity of 2.0 × 10<sup>4</sup> S m<sup>-1</sup> at room temperature, a Vickers hardness of up to ~55.8 GPa, and a toughness of 10.8 to 19.8 MPa m<sup>1/2</sup>. Theoretical calculations indicate that the transformation energy barrier for the graphitization of diamond surface is lower than that for diamond growth directly from conventional <i>sp<sup>2</sup></i> carbon materials, allowing the synthesis of such diamond composites under mild conditions. The above results pave the way for realizing large-sized diamond-based materials with ultrahigh electrical conductivity and superior mechanical properties simultaneously under moderate synthesis conditions, which will facilitate their large-scale applications in a variety of fields.","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 Feb","modification":"2026-04-12T19:10:16.164Z","creation":"2026-04-07T13:17:28.292Z"},"accession":"S-EPMC10907318","cross_references":{"pubmed":["38377204"],"doi":["10.1073/pnas.2316580121"]}}