On the feasibility of strain-induced formation of hollows during hydriding or oxidation of metal nanoparticles.
Hydriding or oxidation of a metal nanoparticle starts on the surface and results in the formation of a hydride or oxide shell. Due to expansion of the shell, the strain in the metal core is tensile, and in principle it may induce the formation of a hollow structure (this hollow-formation mechanism is alternative to that based on the Kirkendall effect). Using the theory of elasticity, we show that this is feasible for oxides but not feasible for hydrides.
Zhdanov
Vladimir P
VP
Department of Applied Physics, Chalmers University of Technology, S-412 96 Göteborg, Sweden. zhdanov@catalysis.ru
Kasemo
Bengt
B