On the Adhesion between Fine Particles and Nanocontacts

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For adhesion forces measured between identicalcontacts, two kinds of variations were observed: afast, random noise and slower fluctuations. Randomnoise is due to thermal vibrations and noise in thedetection system. No intrinsic statistical process isrequired... Viac o knihe

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O knihe

For adhesion forces measured between identicalcontacts, two kinds of variations were observed: afast, random noise and slower fluctuations. Randomnoise is due to thermal vibrations and noise in thedetection system. No intrinsic statistical process isrequired to explain it. The slower fluctuations areprobably caused by plastic deformation and structuralchanges in the material at the nanocontact. Onhomogeneous, smooth surfaces, the distribution ofadhesion forces measured with nanocontacts can be asnarrow as 1.1%. Adhesion force versus humidity curvesmeasured between hydrophilic surfaces can beinterpreted by assuming capillary condensation ofwater into the contact region, which causes ameniscus force. All types of dependencies observedcan be explained by appropriate and realistic tipshapes. As a possible simple model, we introduce thetwo-sphere model with surface roughness. The oftenobserved changes in these dependencies when repeatingexperiments are interpreted as changes in tipgeometry in the 1-10 nm length scale caused by tip wear.

  • Vydavateľstvo: VDM Verlag
  • Formát: Paperback
  • Jazyk:
  • ISBN: 9783639033908

Generuje redakčný systém BUXUS CMS spoločnosti ui42.