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Achieving ultralow friction under high pressure through operando formation of PbS QDs/graphene heterojunction with 0D/1D nanostructure
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.ORCID iD: 0000-0003-3249-9814
Chinese Aeronautical Establishment, Beijing, 100012, China.ORCID iD: 0000-0001-9505-7664
State Key Laboratory of Tribology in Advanced Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements. School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China.ORCID iD: 0000-0003-3919-2962
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2024 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 218, article id 118748Article in journal (Refereed) Published
Abstract [en]

In this work, ultralow friction (0.054) of graphene was achieved under high contact pressure (1.03 GPa) and atmosphere environment via the operando formation of PbS quantum dots (QDs)/graphene heterojunction at the frictional interface. It is found that PbS QDs are trapped in graphene nanosheets via shear-induced rearrangement for obtaining the PbS QDs/graphene heterojunctions, which provide an excellent rolling effect to lower friction. It is also found that the heterogeneous PbS QDs/graphene tribofilms have a strong Pb-enriched function and heterojunction nanorod phase. Our objective is to uncover the physical and chemical mechanisms governing the friction of 0D/1D nanostructures within PbS QDs/graphene heterostructures through our studies. This research will enhance our comprehension of nanomaterials' frictional behavior while offering valuable guidance and optimization strategies for their application in mechanical engineering and functional nanomaterials. Consequently, our efforts aim to foster the advancement of nanoscience and technology, leading to additional scientific and technological breakthroughs.

Place, publisher, year, edition, pages
Elsevier, 2024. Vol. 218, article id 118748
Keywords [en]
Heterojunction, Interfacial nanostructure, Nanocomposites, Quantum dots, Tribo-physicochemical
National Category
Physical Chemistry
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-103517DOI: 10.1016/j.carbon.2023.118748ISI: 001146695900001Scopus ID: 2-s2.0-85180553153OAI: oai:DiVA.org:ltu-103517DiVA, id: diva2:1824713
Funder
Vinnova, 2023-00993
Note

Validerad;2024;Nivå 2;2024-01-24 (signyg);

Funder: National Natural Science Foundation of China (51905295; 52275170); Liaoning Key Laboratory of Aero-engine Materials Tribology (LKLAMTF202304); the Tribology Science Fund of State Key Laboratory of Tribology in Advanced Equipment (SKLTKF21B09; SKLTKF21A04);

Full text license: CC BY-4.0

Available from: 2024-01-08 Created: 2024-01-08 Last updated: 2024-04-04Bibliographically approved

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Zhao, JunShi, Yijun

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