Friction hysteretic behavior of supported atomically thin nanofilms
نویسندگان
چکیده
Abstract Hysteretic friction behavior has been observed on varied 2D nanofilms. However, no unanimous conclusion yet drawn to the exact mechanism or relative contribution of each behavior. Here we report hysteretic supported atomically thin nanofilms studied using atomic force microscopy (AFM) experiments and molecular dynamics (MD) simulations. Load dependent measurements were conducted unheated heated samples graphene, h-BN, MoS 2 by silica substrates. Two diverging trends are reported: showed higher during unloading than loading, a reversed hysteresis. Further, increased sub-linearly with normal for samples, compared samples. Tapping mode AFM suggested that interaction strength substrate was heating. Roughened substrates in MD simulations mimicked strong/weak forces reproduced experimental observations revealed evolution real contact area different interface situation caused behaviors. Surface roughness found be key parameters controlling out-of-plane deformation
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ژورنال
عنوان ژورنال: npj 2D materials and applications
سال: 2023
ISSN: ['2397-7132']
DOI: https://doi.org/10.1038/s41699-022-00363-z