Oxidation induced softening in Al nanowires

Fatih G. Sen, Yue Qi, Adri C.T. Van Duin, Ahmet T. Alpas

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

The mechanical properties of metallic nanowires depend dramatically on the atmospheric conditions. Molecular-dynamics simulations with ReaxFF were conducted to study tensile elastic deformation of oxidized Al nanowires. The thin amorphous oxide shell formed around Al nanowires had a very low Young's modulus of 26 GPa, due to its low density and low Al-O coordination. Consequently, for diameters less than 100 nm, the composite Young's modulus of oxide-covered Al nanowires showed a size dependence implying that in this case "smaller is softer." The model developed also explained the discrepancies in the reported modulus values of nanometer-scale Al thin films.

Original languageEnglish (US)
Article number051912
JournalApplied Physics Letters
Volume102
Issue number5
DOIs
StatePublished - Feb 4 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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