Lee WJ, Chang JG, Ju SP, Weng MH, Lee CH. Structure-dependent mechanical properties of ultrathin zinc oxide nanowires.
NANOSCALE RESEARCH LETTERS 2011;
6:352. [PMID:
21711876 PMCID:
PMC3211442 DOI:
10.1186/1556-276x-6-352]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Accepted: 04/20/2011] [Indexed: 05/31/2023]
Abstract
Mechanical properties of ultrathin zinc oxide (ZnO) nanowires of about 0.7-1.1 nm width and in the unbuckled wurtzite (WZ) phase have been carried out by molecular dynamics simulation. As the width of the nanowire decreases, Young's modulus, stress-strain behavior, and yielding stress all increase. In addition, the yielding strength and Young's modulus of Type III are much lower than the other two types, because Type I and II have prominent edges on the cross-section of the nanowire. Due to the flexibility of the Zn-O bond, the phase transformation from an unbuckled WZ phase to a buckled WZ is observed under the tensile process, and this behavior is reversible. Moreover, one- and two-atom-wide chains can be observed before the ZnO nanowires rupture. These results indicate that the ultrathin nanowire possesses very high malleability.
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