title: Complex tribomechanical characterization of ZnO nanowires: nanomanipulations supported by FEM simulations.
abstract: In the present work, we demonstrate a novel approach to nanotribological measurements based on the bending manipulation of hexagonal ZnO nanowires (NWs) in an adjustable half-suspended configuration inside a scanning electron microscope. A pick-and-place manipulation technique was used to control the length of the adhered part of each suspended NW. Static and kinetic friction were found by a 'self-sensing' approach based on the strain profile of the elastically bent NW during manipulation and its Young's modulus, which was separately measured in a three-point bending test with an atomic force microscope. The calculation of static friction from the most bent state was completely reconsidered and a novel more realistic crack-based model was proposed. It was demonstrated that, in contrast to assumptions made in previously published models, interfacial stresses in statically bent NW are highly localized and interfacial strength is comparable to the bending strength of NW measured in respective bending tests.
authors.affiliation: Institute of Physics, University of Tartu, Ravila 14c, 50412, Tartu, Estonia.
authors.forename: Sergei
authors.initials: S
authors.lastname: Vlassov
authors.forename: Boris
authors.initials: B
authors.lastname: Polyakov
authors.forename: Sven
authors.initials: S
authors.lastname: Oras
authors.forename: Mikk
authors.initials: M
authors.lastname: Vahtrus
authors.forename: Mikk
authors.initials: M
authors.lastname: Antsov
authors.forename: Andris
authors.initials: A
authors.lastname: Šutka
authors.forename: Krisjanis
authors.initials: K
authors.lastname: Smits
authors.forename: Leonid M
authors.initials: LM
authors.lastname: Dorogin
authors.forename: Rünno
authors.initials: R
authors.lastname: Lõhmus