Kinetical faceting of the low index W surfaces under electrical current

Jiong Zhao, Rong Yu, Sheng Dai, Jing Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

It's widely accepted that when the scale goes down deeply into nanometer, the surfaces of materials will play a crucial role. In equilibrium, the as-fabricated surfaces are usually determined by Wulff construction. However, the technique to rebuild the surface in the scale of as fine as 1 nm, especially to build the off-equilibrium high energy facets is still rare. Here we provide a simple but effective solution for rebuilding the surfaces on the basis of kinetics over thermodynamics. Our in situ transmission electron microscopy (TEM) experiments demonstrate that the flat surfaces of W naturally decompose into off-equilibrium faceted surfaces when electrical current passes in certain directions. The experiments and simulations confirmed that, by using a polar plot and the data of surface diffusivities, the stability of any kind of surfaces as well as the exact post-treatment structures (surface type and periodical length) can be determined. This technique can be generally extended to most conductive solid surfaces.
Original languageEnglish
Pages (from-to)10-15
Number of pages6
JournalSurface Science
Volume625
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes

Keywords

  • Electromigration
  • In situ TEM
  • Kinetically control
  • Surface faceting

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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