Formation of hollow structures through diffusive phase transition across a membrane

Luca Pasquini, Amelia Montone, Elsa Callini, Marco Vittori Antisari, Ennio Bonetti

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Abstract

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.
Original languageEnglish
Article number021911
Pages (from-to)-
JournalApplied Physics Letters
Volume99
Issue number2
DOIs
Publication statusPublished - 11 Jul 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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