Casimir-like effect driven self-assembly of graphene on molten metals
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866918148456841216 |
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| author | Bukvišová, Kristýna Kalousek, Radek Patočka, Marek Zlámal, Jakub Planer, Jakub Mahel, Vojtěch Citterberg, Daniel Novák, Libor Šikola, Tomáš Kodambaka, Suneel Kolíbal, Miroslav |
| author_facet | Bukvišová, Kristýna Kalousek, Radek Patočka, Marek Zlámal, Jakub Planer, Jakub Mahel, Vojtěch Citterberg, Daniel Novák, Libor Šikola, Tomáš Kodambaka, Suneel Kolíbal, Miroslav |
| contents | Casimir effect, explained by Hendrik Casimir in 1948, is a macroscopic manifestation of quantum electrodynamics. Symmetry breaking due to space confinement of vacuum fluctuations in between two planar mirrors results in an attractive force acting between the two mirrors. Here, we show that spontaneous self-assembly of two-dimensional (2D) layered materials grown on molten metals (rheotaxy) is driven by the mechanical forces exerted by the liquid on the graphene domain and that these forces are subject to a Casimir-like effect. We present in situ environmental and ultrahigh vacuum scanning electron microscopy observations of chemical vapor deposition of graphene on both solid and molten gold and copper, which reveal that the self-assembly occurs via translational and rotational motions of graphene domains during growth on molten metals. Using high-temperature (~ 1300 K) atomic force microscopy measurements of graphene/molten-metal interfaces, coupled with density functional theory and continuum modelling of 2D layers floating on a liquid surface, we attribute the observed phenomena to Casimir-like effect of surface undulations and give further guidance for achieving seamless stitching of 2D layer domains into large scale monolayers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_04327 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Casimir-like effect driven self-assembly of graphene on molten metals Bukvišová, Kristýna Kalousek, Radek Patočka, Marek Zlámal, Jakub Planer, Jakub Mahel, Vojtěch Citterberg, Daniel Novák, Libor Šikola, Tomáš Kodambaka, Suneel Kolíbal, Miroslav Mesoscale and Nanoscale Physics Materials Science Applied Physics Casimir effect, explained by Hendrik Casimir in 1948, is a macroscopic manifestation of quantum electrodynamics. Symmetry breaking due to space confinement of vacuum fluctuations in between two planar mirrors results in an attractive force acting between the two mirrors. Here, we show that spontaneous self-assembly of two-dimensional (2D) layered materials grown on molten metals (rheotaxy) is driven by the mechanical forces exerted by the liquid on the graphene domain and that these forces are subject to a Casimir-like effect. We present in situ environmental and ultrahigh vacuum scanning electron microscopy observations of chemical vapor deposition of graphene on both solid and molten gold and copper, which reveal that the self-assembly occurs via translational and rotational motions of graphene domains during growth on molten metals. Using high-temperature (~ 1300 K) atomic force microscopy measurements of graphene/molten-metal interfaces, coupled with density functional theory and continuum modelling of 2D layers floating on a liquid surface, we attribute the observed phenomena to Casimir-like effect of surface undulations and give further guidance for achieving seamless stitching of 2D layer domains into large scale monolayers. |
| title | Casimir-like effect driven self-assembly of graphene on molten metals |
| topic | Mesoscale and Nanoscale Physics Materials Science Applied Physics |
| url | https://arxiv.org/abs/2503.04327 |