Self-supporting hierarchically organized silicon networks via magnesiothermic reduction

Author(s)

Michael Waitzinger, Michael S. Elsaesser, Raphael J. F. Berger, Johanna Akbarzadeh, Herwig Peterlik, Nicola Huesing

Abstract

Using a magnesiothermic reduction process, the successful conversion of hierarchically organized meso/macroporous silica monoliths to self-supporting macroporous silicon networks comprising interparticle mesoporosity has been demonstrated. By careful variation of reaction time and temperature, the final network structure can be controlled to a large degree. Scanning and transmission electron microscopy images indicate that the cellular silicon structure is built up from aggregated 1-15 nm sized crystalline silicon particles aggregated to struts that form macropores of approximately 2 μm diameter.

Organisation(s)

Dynamics of Condensed Systems

External organisation(s)

Paris-Lodron Universität Salzburg

Journal

Monatshefte für Chemie

Volume

147

Pages

269-278

No. of pages

10

ISSN

0026-9247

DOI

https://doi.org/10.1007/s00706-015-1611-8

Publication date

02-2016

Peer reviewed

Yes

Austrian Fields of Science 2012

104011 Materials chemistry, 103018 Materials physics

Keywords

ASJC Scopus subject areas

Chemistry(all)

Portal url

https://ucrisportal.univie.ac.at/en/publications/selfsupporting-hierarchically-organized-silicon-networks-via-magnesiothermic-reduction(7168dff9-af43-41d6-80d3-373586161a7b).html