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

Producción científica: Article › revisión exhaustiva

10 Citas (Scopus)

Resumen

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.

Idioma original	English
Páginas (desde-hasta)	1125-1128
Número de páginas	4
Publicación	Scripta Materialia
Volumen	61
N.º	12
DOI	https://doi.org/10.1016/j.scriptamat.2009.09.003
Estado	Published - dic 2009

Nota bibliográfica

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.

Financiación

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.

Financiadores	Número del financiador
National Science Foundation (NSF)	0847693
American Chemical Society Petroleum Research Fund	43324-G10

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2009.09.003

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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 - Li, Wen Chung

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

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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.

KW - AuPd

KW - Dealloying

KW - Nanoporous

KW - Substrate curvature

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JF - Scripta Materialia

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Effects of substrate curvature on dealloying of nanoporous thin films

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ASJC Scopus subject areas

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