The mechanical properties of nanowires consisting of nanoporous gold are studied experimentally. The nanoporous gold is synthesized from dealloyed "white gold" leaf (Au37.4 and Ag62.6 in at.%) into a free-standing dog-bone-shaped specimen with a gauge section 7 μm long, 300 nm wide, and 100 nm thick. The elastic modulus, residual stress, and yield stress are measured by deflective tensile testing and nanoindentation, and are about 9 GPa, 65 MPa, and 110 MPa, respectively.
Bibliographical noteFunding Information:
J.W.K. acknowledges support from NSF CMS-0134226 and AFOSR FA5550-06-1-0214. This work was also supported by the Academic Quality Fund from Columbia University and has used the shared experimental facilities supported primarily by the MRSEC Program of the National Science Foundation under Award Number DMR-0213574 and by the New York State Office of Science, Technology and Academic Research (NYSTAR) as well as the shared experimental facilities of NSEC Program of the National Science Foundation under NSF CHE-0117752. X.C. acknowledges support from NSF CMS-0407743. The authors thank Prof. J. Erlebacher and Dr. C.A. Volkert for interesting discussions.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys