We report on the formation of hollow structures driven by a phase transition that proceeds via diffusion through a membrane. The mechanism is demonstrated for Mg/MgO core/shell nanoparticles: When they undergo successive metal-hydride transitions at sufficiently high temperature, the core material progressively diffuses outward and evaporates, leaving a hollow shell with the original shape and thickness. This phenomenon might become a general approach to the design of materials with controlled porosity. © 2011 American Institute of Physics.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
Pasquini, L., Montone, A., Callini, E., Antisari, M. V., & Bonetti, E. (2011). Formation of hollow structures through diffusive phase transition across a membrane. Applied Physics Letters, 99(2), -. . https://doi.org/10.1063/1.3610973