Abstract
Two-dimensional metals have gained great attention in recent years. However, most of these metals possess relatively strong chemical bonding in three directions; therefore, it is difficult to synthesize 2D metals. In this paper, we prepared 2D and thin- film copper materials via magnetron sputtering. 2D and thin-film copper are formed due to the accumulation of strain and stress associated with different coefficients of thermal expansion for the metal and substrate. SEM and AFM studies suggest that the minimum thickness of a freestanding single layer is approximately 1 nm, with lateral dimensions up to a few millimeters.
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The data that support the findings of this study are available on request from the corresponding author, upon reasonable request.
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Funding
The author thanks for financial support from the grant of the Ministry of Education, Youth- and Sports of Czech Republic (Grant No. LM2023037), the European Regional Development Fund Project, the project NANOMAT CZ.02.1.01/0.0/0.0/17_048/0007376 and the project of Faculty of Chemical Technology, University of Pardubice “Excellent teams”2023, the grant of Hebei Normal University (Grant No. L2021B12) and the HeBei NSF (Grant No. QN2023054).
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GW and BG: carried out the experiment. PJ: conducted COMSOL simulation. BZ: wrote the manuscript with support from TW. TW: supervised the project.
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Gu, B., Wen, G., Zhang, B. et al. 2D and thin-film copper synthesized via magnetron sputtering. MRS Communications (2024). https://doi.org/10.1557/s43579-024-00529-4
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DOI: https://doi.org/10.1557/s43579-024-00529-4