Atomic-scale nanoindentation: detection and identification of single glide events in three dimensions by force microscopy

Indentation experiments on the nanometre scale have been performed by means of atomic force microscopy in ultra-high vacuum on KBr(100) surfaces. The surfaces yield in the form of discrete surface displacements with a typical length scale of 1 Å. These surface displacements are detected in both norm...

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Bibliographic Details
Published in:Nanotechnology 2011-10, Vol.22 (42), p.425703-1-9
Main Authors: Egberts, P, Bennewitz, R
Format: Article
Language:English
Subjects:
Calibration
Glide
Indentation
Microscopy
Shear stress
Simulation
Surface chemistry
Three dimensional
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Summary:Indentation experiments on the nanometre scale have been performed by means of atomic force microscopy in ultra-high vacuum on KBr(100) surfaces. The surfaces yield in the form of discrete surface displacements with a typical length scale of 1 Å. These surface displacements are detected in both normal and lateral directions. Measurement of the lateral tip displacement requires a load-dependent calibration due to the load dependence of the effective lateral compliance. Correlation of the lateral and normal displacements for each glide event allow identification of the activated slip system. The results are discussed in terms of the resolved shear stress in indentation experiments and of typical results in atomistic simulations of nanometre-scale indentation.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/22/42/425703