Effects of substrate curvature on dealloying of nanoporous thin films

Wen Chung Li; T. John Balk

doi:10.1016/j.scriptamat.2009.09.003

Effects of substrate curvature on dealloying of nanoporous thin films

Wen Chung Li, T. John Balk

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Co-sputtered AuPdAg alloy films on flat and curved substrates were investigated to determine the effects of substrate curvature on dealloying and microstructure of nanoporous (np) AuPd. Ligament morphology, film cracking and composition were significantly different for np-AuPd in concave vs. convex film regions. Convex substrate curvature led to extensive film cracking, wide and high aspect ratio ligaments, and low residual Ag content. This is attributed to a more tensile stress state that enhances the dissolution rate of Ag.

Original language	English
Pages (from-to)	1125-1128
Number of pages	4
Journal	Scripta Materialia
Volume	61
Issue number	12
DOIs	https://doi.org/10.1016/j.scriptamat.2009.09.003
State	Published - Dec 2009

Bibliographical note

Funding Information:
This material is based upon work supported by the National Science Foundation under Grant No. DMR-0847693 . Acknowledgment is made to the Donors of the American Chemical Society Petroleum Research Fund (Grant No. 43324-G10 ), for support of this research. T.J.B. thanks the National Center for Electron Microscopy for the NCEM Visiting Scientist Fellowship that allowed some of the SEM work to be carried out.

Keywords

AuPd
Dealloying
Nanoporous
Substrate curvature

ASJC Scopus subject areas

Materials Science (all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2009.09.003

Cite this

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title = "Effects of substrate curvature on dealloying of nanoporous thin films",

abstract = "Co-sputtered AuPdAg alloy films on flat and curved substrates were investigated to determine the effects of substrate curvature on dealloying and microstructure of nanoporous (np) AuPd. Ligament morphology, film cracking and composition were significantly different for np-AuPd in concave vs. convex film regions. Convex substrate curvature led to extensive film cracking, wide and high aspect ratio ligaments, and low residual Ag content. This is attributed to a more tensile stress state that enhances the dissolution rate of Ag.",

keywords = "AuPd, Dealloying, Nanoporous, Substrate curvature",

author = "Li, {Wen Chung} and Balk, {T. John}",

note = "Funding Information: This material is based upon work supported by the National Science Foundation under Grant No. DMR-0847693 . Acknowledgment is made to the Donors of the American Chemical Society Petroleum Research Fund (Grant No. 43324-G10 ), for support of this research. T.J.B. thanks the National Center for Electron Microscopy for the NCEM Visiting Scientist Fellowship that allowed some of the SEM work to be carried out. ",

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AU - Balk, T. John

N1 - Funding Information: This material is based upon work supported by the National Science Foundation under Grant No. DMR-0847693 . Acknowledgment is made to the Donors of the American Chemical Society Petroleum Research Fund (Grant No. 43324-G10 ), for support of this research. T.J.B. thanks the National Center for Electron Microscopy for the NCEM Visiting Scientist Fellowship that allowed some of the SEM work to be carried out.

PY - 2009/12

Y1 - 2009/12

N2 - Co-sputtered AuPdAg alloy films on flat and curved substrates were investigated to determine the effects of substrate curvature on dealloying and microstructure of nanoporous (np) AuPd. Ligament morphology, film cracking and composition were significantly different for np-AuPd in concave vs. convex film regions. Convex substrate curvature led to extensive film cracking, wide and high aspect ratio ligaments, and low residual Ag content. This is attributed to a more tensile stress state that enhances the dissolution rate of Ag.

AB - Co-sputtered AuPdAg alloy films on flat and curved substrates were investigated to determine the effects of substrate curvature on dealloying and microstructure of nanoporous (np) AuPd. Ligament morphology, film cracking and composition were significantly different for np-AuPd in concave vs. convex film regions. Convex substrate curvature led to extensive film cracking, wide and high aspect ratio ligaments, and low residual Ag content. This is attributed to a more tensile stress state that enhances the dissolution rate of Ag.

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KW - Dealloying

KW - Nanoporous

KW - Substrate curvature

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Effects of substrate curvature on dealloying of nanoporous thin films

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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