A theoretical investigation of size-dependent composition and stresses in nanowires and nanotubes of ceria. (15th March 2016)

• Record Type: Journal Article
• Authors: Haftbaradaran, Hamed; Mossaiby, Farshid
• Is Part Of: Scripta materialia. Volume 114(2016)
• Page Start: 142
• Page End: 145
• Publication Date: 2016-03-15
• Subjects: Non-stoichiometry -- Space charge theory -- Ceria -- Size-dependency -- Nanowires; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.12.006
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In the past few decades, nanostructures of ceria have received significant attention for potential applications in a variety of technologies. Experiments have frequently shown that physical properties of ceria nanomaterials are strongly size-dependent. Here, by accounting for the highly non-linear coupling between electrical, chemical and mechanical driving forces, we develop a continuum model which allows us to investigate equilibrium distribution of defects in nanowires and nanotubes of ceria. It is shown that the model predicts strongly size-dependent non-stoichiometric composition, lattice constant and surface stresses in ceria nanostructures whose diameter is comparable with the Debye's length scale of the problem. Graphical abstract: