Freestanding single crystal nanowires of gold were fabricated from a single grain of pure gold leaf by standard lithographic techniques, with center section of 7 μm in length, 250 nm in width, and 100 nm in thickness. The ends remained anchored to a silicon substrate. The specimens were deflected via nanoindenter until plastic deformation was achieved. Nonlocalized and localized plastic deformations were observed. The resulting force-displacement curves were simulated using continuum single crystal plasticity. A set of material parameters which closely reproduce the experimental results suggests that the initial critical resolved shear stress was as high as 135 MPa.
Bibliographical noteFunding Information:
Support from AFOSR FA5550-06-1-0214 and NSF CMS-0134226 and NSF CMS-0407743 is gratefully acknowledged. In addition, this work has used the shared experimental facilities that are supported primarily by the MRSEC Program of the National Science Foundation under Award No. DMR-0213574 and by the New York State Office of Science, Technology and Academic Research (NYSTAR).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)