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Issues in validation of friction in the nanometric domain

Friction is one of the most challenging problems in micro- and nanosystems’ technologies. While frictional phenomena on the macro- and meso- scales are well described and can generally be efficiently compensated via proper control typologies, in the nanometric domain friction is still a matter of persistent studies. Our ongoing work aims at providing a contribution to the study of friction by characterising the parameters influencing its value at the nanometric scale. The dependence of friction on material types, surface topography, loading conditions, velocity of motion, temperature and lubrication will thus be investigated via SPM measurements. Due to the large number of monitored influences, the number and type of measurements will be determined by using novel metamodeling techniques of arranging the measurement campaigns. Preliminary results aimed at a systematic engineering approach to the conduction of a finite set of methodical experiments characterising nanometric friction are thus presented in this paper.

Nanometric friction ; experimental determination ; scanning probe microscope ; design of experiments ; friction model

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