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.
Titolo: | Formation of hollow structures through diffusive phase transition across a membrane |
Autore/i: | PASQUINI, LUCA; A. Montone; CALLINI, ELSA; M. Vittori Antisari; BONETTI, ENNIO |
Autore/i Unibo: | |
Anno: | 2011 |
Rivista: | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1063/1.3610973 |
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. |
Data prodotto definitivo in UGOV: | 2013-06-26 18:20:06 |
Appare nelle tipologie: | 1.01 Articolo in rivista |
File in questo prodotto:
Eventuali allegati, non sono esposti
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.