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Type: 
Journal
Description: 
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.
Publisher: 
AIP
Publication date: 
11 Jul 2011
Authors: 

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

Biblio References: 
Volume: 99 Issue: 2 Pages: 021911
Origin: 
Applied Physics Letters