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Author: McMeeking, Robert × DDC: 620 ×

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    The role of the backing layer in the mechanical properties of micrometer-scale fibrillar structures
    (Saarbrücken : Leibniz-Institut für Neue Materialien, 2010) Guidoni, Griselda; Schillo, Dominik; Hangen, Ude; Castellanos, Graciela; Arzt, Eduard; McMeeking, Robert; Bennewitz, Roland
    The contact mechanics of a micro-fabricated fibrillar surface structure made of poly(dimethylsiloxane) (PDMS) was studied in this work. The attachment and detachment of individual fibrils to and from a spherical indenter upon approach and retraction are detected as jumps in force and stiffness. A quantitative model describes the jumps in stiffness values by taking into account the deformation of the backing layer. The results emphasize the importance of long-range interactions in the contact mechanics of elastic materials and confirm the concepts underlying the development of fibrillar adhesive materials.