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Sliding experiments were performed on polystyrene (PS) with a nanotip. Several molecular weights were investigated. The friction coefficients were found to be between 0.2 and 0.45, i.e., friction coefficients very close to the ones measured with a tribometer. Thus, in the case of these amorphous PS films, it appears that the friction coefficient is scale-independent. The velocity dependence was also...
Among near field microscopes, the atomic force microscope (AFM) is a powerful and versatile tool for investigating local mechanical properties, friction and adhesiveness. Especially, the knowledge of the contribution of the friction may become of primary importance to understand the structure of the objects deposited on a surface. In this paper, we show that the contribution of the force of friction...
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