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Orientation variation of surface strain

DOI: 10.1103/PhysRevB.76.115425 DOI Help

Authors: R. Harder (London Center for Nanotechnology, Department of Physics and Astronomy, University College London, U.K.) , M. A. Pfeifer (Department of Physics, La Trobe University, Australia) , G. J. Williams (School of Physics, University of Melbourne, Australia) , I. A. Vartaniants (HASYLAB, DESY, Germany) , I. K. Robinson (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 76 (11) , PAGES 459-466

State: Published (Approved)
Published: September 2007

Open Access Open Access

Abstract: Expansion of the surface layers of a facetted hemispherical nanocrystal of Pb is reported at a temperature just below the melting point. Inversion of the coherent x-ray diffraction pattern yields quantitative three-dimensional maps of the deformation of the crystal from its equilibrium lattice spacing. Most of the surface of the crystal has a clear outward displacement, which decays exponentially into the bulk. This is suppressed on the (111) facet itself and is stronger on the spherical regions, suggesting that it arises from the orientational variation of the underlying surface stress.

Journal Keywords: X-Ray Standing Waves; Adsorbate Structure

Subject Areas: Chemistry

Facility: Advanced Photon Source (APS)