Adhered cantilevers: A new method to measure dispersion forces between rough surfaces at short distancesстатья
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Дата последнего поиска статьи во внешних источниках: 25 марта 2020 г.
Аннотация:Dispersion forces start to play an important role when the bodies are separated by the
distances smaller than 100 nm. Such small gaps characterize modern nano- or micro-
electromechanical systems. Although the forces were reliably measured and compared to the theory in the range of 30-100 nm, severe problems appear at distances shorter than 30 nm due to jump-to-contact instability. In this paper we propose a new measurement method, which does not suffer the short-distance instability. The method is based on the shape of an adhered cantilever that is sensitive to the forces acting near the adhered end. Two values are measured simultaneously: the dispersion pressure at minimal separation (close to contact) and the adhesion energy. Roughness of interacting surfaces plays a crucial role. We discuss possible realization of this experiment and propose the choice of optimal parameters.