Deformation and adhesion of elastomer poly(dimethylsiloxane) colloidal AFM probes (Articolo in rivista)

Type
Label
  • Deformation and adhesion of elastomer poly(dimethylsiloxane) colloidal AFM probes (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Buzio, R; Bosca, A; Krol, S; Marchetto, D; Valeri, S; Valbusa, U (2007)
    Deformation and adhesion of elastomer poly(dimethylsiloxane) colloidal AFM probes
    in Langmuir
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Buzio, R; Bosca, A; Krol, S; Marchetto, D; Valeri, S; Valbusa, U (literal)
Pagina inizio
  • 9293 (literal)
Pagina fine
  • 9302 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 23 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ABC, Nanomed Labs, I-16136 Genoa, Italy; Univ Genoa, Dept Phys, I-16146 Genoa, Italy; CBM Ctr Mol Biomed, I-34012 Trieste, Italy; Univ Modena, Dept Phys, I-41100 Modena, Italy; Reggio Emilia, I-41100 Modena, Italy; CNR, INFM Res Ctr S3, I-41100 Modena, Italy (literal)
Titolo
  • Deformation and adhesion of elastomer poly(dimethylsiloxane) colloidal AFM probes (literal)
Abstract
  • We report on the synthesis and characterization of elastomer colloidal AFM probes. Poly(dimethylsiloxane) microparticles, obtained by water emulsification and cross-linking of viscous prepolymers, are glued to AFM cantilevers and used for contact mechanics investigations on smooth substrates: in detail cyclic loading-unloading experiments are carried on ion-sputtered mica, the deformation rate and dwell time being separately controlled. We analyze load-penetration curves and pull-off forces with models due respectively to Zener; Maugis and Barquins; and Greenwood and Johnson and account for bulk creep, interfacial viscoelasticity, and structural rearrangements at the polymer-substrate interface. A good agreement is found between experiments and theory, with a straightforward estimation of colloidal probes' material parameters. We suggest the use of such probes for novel contact mechanics experiments involving fully reversible deformations at the submicrometer scale. (literal)
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