Role of adhesion in shear strength of nanowire-substrate interfaces

M. P. Manoharan, M. A. Haque

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The shear strength of nanowire-substrate contact critically influences the electrical and mechanical contact characteristics of nanowire-based sensors, actuators and nanoelectronic devices. Yet, very few studies are available in the literature because of the experimental challenges associated with these one-dimensional nanostructures and none of the existing contact mechanics models account for their ultra-high bending compliance. Using a novel experimental setup that effectively decouples adhesion and friction forces, we show that the friction coefficient for the zinc oxide nanowires and silicon system can be about two orders of magnitude higher than the bulk values, even under zero externally applied normal loads. We model nanowire bending compliance and capillary line tension as competing mechanisms to explain the observed anomalous adhesion-friction coupling and establish a criterion for contact area dependence in friction in one-dimensional interfaces.

Original languageEnglish (US)
Article number095304
JournalJournal of Physics D: Applied Physics
Volume42
Issue number9
DOIs
StatePublished - May 7 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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