Poisson's ratio of individual metal nanowires
Eoin K McCarthy, Allen T Bellew, John E Sader, John J Boland
Nature Communications | NATURE PUBLISHING GROUP | Published : 2014
The measurement of Poisson's ratio of nanomaterials is extremely challenging. Here we report a lateral atomic force microscope experimental method to electromechanically measure the Poisson's ratio and gauge factor of individual nanowires. Under elastic loading conditions we monitor the four-point resistance of individual metallic nanowires as a function of strain and different levels of electrical stress. We determine the gauge factor of individual wires and directly measure the Poisson's ratio using a model that is independently validated for macroscopic wires. For macroscopic wires and nickel nanowires we find Poisson's ratios that closely correspond to bulk values, whereas for silver nan..View full abstract
Awarded by Science Foundation Ireland
Awarded by European Commission (ERC Advanced Grant AdG)
We would like to thank Dr Alan P. Bell, Dr Maria Kolesnik, Dr Tarek Lutz, Stephen Connaughton and the staff at the Advanced Microscopy Laboratory (AML), CRANN, Trinity College Dublin. We would like to acknowledge support from the following funding bodies: the Science Foundation Ireland [grant No: 08/CE/I1432 and No. 06/IN.1/I106], the European Commission (ERC Advanced Grant AdG 321160) and the Australian Research Council Grants Scheme.