A Generalized Description of the Elastic Properties of Nanowires
Abstract
We report a model of nanowire (NW) mechanics that describes force vs displacement curves over the entire elastic range for diverse wire systems. Due to the clamped-wire measurement configuration, the force response in the linear elastic regime can be linear or nonlinear, depending on the system and the wire displacement. For Au NWs the response is essentially linear since yielding occurs prior to the onset of the inherent nonlinearity, while for Si NWs the force response is highly nonlinear, followed by brittle fracture. Since the method describes the entire range of elastic deformation, it unequivocally identifies the yield points in both of these materials.
Acknowledgement
The work at the Department of Chemistry and the Center for Research on Adaptive Nanostructures and Nanodevices at Trinity College Dublin is supported by Science Foundation Ireland under Grant 00/PI.1/C077A.2. The research by J.E.S. is supported by a Science Foundation Ireland Walton Fellowship and was performed while on leave at Trinity College Dublin. The work at Hewlett-Packard is partially supported by the U.S. Defense Advanced Research Projects Agency (DARPA).
Additional details
- ISSN
- 1530-6992
- Science Foundation Ireland
- 00/PI.1/C077A.2
- Defense Advanced Research Projects Agency