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Fabrication of meso-porous sintered metal thin films by selective etching of silica based sacrificial template

Dumee,LF, She,F, Duke,M, Gray,S, Hodgson,P and Kong,L 2014, Fabrication of meso-porous sintered metal thin films by selective etching of silica based sacrificial template, Nanomaterials, vol. 4, no. 3, pp. 686-699, doi: 10.3390/nano4030686.

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Title Fabrication of meso-porous sintered metal thin films by selective etching of silica based sacrificial template
Author(s) Dumee,LFORCID iD for Dumee,LF orcid.org/0000-0002-0264-4024
She,FORCID iD for She,F orcid.org/0000-0001-8191-0820
Duke,M
Gray,S
Hodgson,P
Kong,LORCID iD for Kong,L orcid.org/0000-0001-6219-3897
Journal name Nanomaterials
Volume number 4
Issue number 3
Start page 686
End page 699
Total pages 14
Publisher MDPI AG
Place of publication Basel, Switzerland
Publication date 2014-09-01
ISSN 2079-4991
Keyword(s) Science & Technology
Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Science & Technology - Other Topics
Materials Science
meso-porous metal materials
metal nano-particle sintering
surface texturing
metal particle coalescence
silica template etching
X-RAY-SCATTERING
IN-SITU
NANOSTRUCTURED MATERIALS
POWDER MIXTURES
NANOPARTICLES
SEPARATION
COMPOSITES
SIZE
Summary  Meso-porous metal materials have enhanced surface energies offering unique surface properties with potential applications in chemical catalysis, molecular sensing and selective separation. In this paper, commercial 20 nm diameter metal nano-particles, including silver and copper were blended with 7 nm silica nano-particles by shear mixing. The resulted powders were cold-sintered to form dense, hybrid thin films. The sacrificial silica template was then removed by selective etching in 12 wt% hydrofluoric acid solutions for 15 min to reveal a purely metallic meso-porous thin film material. The impact of the initial silica nano-particle diameter (7–20 nm) as well as the sintering pressure (5–20 ton·m−2) and etching conditions on the morphology and properties of the final nano-porous thin films were investigated by porometry, pyknometery, gas and liquid permeation and electron microscopy. Furthermore, the morphology of the pores and particle aggregation during shear mixing were assessed through cross-sectioning by focus ion beam milling. It is demonstrated that meso-pores ranging between 50 and 320 nm in average diameter and porosities up to 47% can be successfully formed for the range of materials tested.
Language eng
DOI 10.3390/nano4030686
Field of Research 090404 Membrane and Separation Technologies
Socio Economic Objective 860602 Inorganic Industrial Chemicals
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, MDPI AG
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070391

Document type: Journal Article
Collections: Institute for Frontier Materials
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.