A theoretical investigation of size-dependent composition and stresses in nanowires and nanotubes of ceria

作者：Haftbaradaran Hamed^*; Mossaiby Farshid

来源：Scripta Materialia, 2016, 114: 142-145.

DOI：10.1016/j.scriptamat.2015.12.006

• Non-stoichiometry
• Space charge theory
• Ceria
• Size-dependency
• Nanowires

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.

• 出版日期2016-3-15