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Compressive Stress Accumulation in Composite Nanoporous Gold and Silicone Bilayer Membranes: Underlying Mechanisms and Remedies

Published online by Cambridge University Press:  01 February 2011


Erkin Seker
Affiliation:
erkin@virginia.edu, University of Virginia, Chemistry, 351 McCormick Rd., Thornton Hall C227, Charlottesville, VA, 22904, United States
Ling Huang
Affiliation:
lh9ga@virginia.edu, University of Virginia, Department of Chemistry, Charlottesville, VA, 22904, United States
Matthew R. Begley
Affiliation:
begley@virginia.edu, University of Virginia, Department of Mechanical and Aerospace Engineering, Charlottesville, VA, 22904, United States
Hilary Bart-Smith
Affiliation:
hb8h@virginia.edu, University of Virginia, Department of Mechanical and Aerospace Engineering, Charlottesville, VA, 22904, United States
Robert G. Kelly
Affiliation:
rgk6y@virginia.edu, University of Virginia, Department of Materials Science and Engineering, Charlottesville, VA, 22904, United States
Giovanni Zangari
Affiliation:
gz3e@virginia.edu, University of Virginia, Department of Materials Science and Engineering, Charlottesville, VA, 22904, United States
Michael L. Reed
Affiliation:
reed@virginia.edu, University of Virginia, Department of Electrical and Computer Engineering, Charlottesville, VA, 22904, United States
Marcel Utz
Affiliation:
mu3q@virginia.edu, University of Virginia, Department of Mechanical and Aerospace Engineering, Charlottesville, VA, 22904, United States

Abstract

This paper outlines a simple method to fabricate a bilayer membrane consisting of a thin nanoporous gold layer infused with uncured polydimethylsiloxane. The fabrication technique offers excellent adhesion due to mechanical interlocking between porous layer and elastomer, and excellent electrical conductivity up to 25% strain, despite a very low effective elastic modulus (∼1.35 MPa) due to cracks in the embedded gold layer. Initially freestanding circular membranes displayed significant out of plane buckling, and created difficulties in extraction of membrane mechanical properties. The underlying mechanisms of compressive stress accumulation that lead to membrane buckling and remedies to prevent it are discussed.


Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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References

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Compressive Stress Accumulation in Composite Nanoporous Gold and Silicone Bilayer Membranes: Underlying Mechanisms and Remedies
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