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- W4308735466 abstract "The behavior of single layer van der Waals (vdW) materials is profoundly influenced by the immediate atomic environment at their surface, a prime example being the myriad of emergent properties in artificial heterostructures. Equally significant are adsorbates deposited onto their surface from ambient. While vdW interfaces are well understood, our knowledge regarding atmospheric contamination is severely limited. Here we show that the common ambient contamination on the surface of: graphene, graphite, hBN and MoS2 is composed of a self-organized molecular layer, which forms during a few days of ambient exposure. Using low-temperature STM measurements we image the atomic structure of this adlayer and in combination with infrared spectroscopy identify the contaminant molecules as normal alkanes with lengths of 20-26 carbon atoms. Through its ability to self-organize, the alkane layer displaces the manifold other airborne contaminant species, capping the surface of vdW materials and possibly dominating their interaction with the environment." @default.
- W4308735466 created "2022-11-15" @default.
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- W4308735466 date "2022-11-09" @default.
- W4308735466 modified "2023-10-16" @default.
- W4308735466 title "The composition and structure of the ubiquitous hydrocarbon contamination on van der Waals materials" @default.
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- W4308735466 doi "https://doi.org/10.1038/s41467-022-34641-7" @default.
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- W4308735466 hasPublicationYear "2022" @default.
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