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Nanofriction Behavior of Cluster-Assembled Carbon Films

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We have characterized the frictional properties of nanostructured carbon films grown by supersonic cluster beam deposition via an atomic force–friction force microscope (AFM–FFM). The experimental data are discussed on the basis of a modified Amonton's law for friction, stating a linear dependence of friction on load plus an adhesive offset accounting for a finite friction force in the limit of null total applied load. Molecular dynamics simulations of the interaction of the AFM tip with the nanostructured carbon confirm the validity of the friction model used for this system. Experimental results show that the friction coefficient is not influenced by the nanostructure of the films nor by the relative humidity. On the other hand the adhesion coefficient depends on these parameters.
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Keywords: AFM; CARBON; CLUSTER-ASSEMBLED MATERIALS; FRICTION; NANOTRIBOLOGY

Document Type: Research Article

Affiliations: 1: INFM, Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy 2: INFM, Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, 20125 Milano, Italy 3: INFM, Dipartimento di Fisica, Università di Cagliari, 09042 Monserrato (CA), Italy

Publication date: 2002-12-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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