Relation between the elastic modulus and the diameter (D) of ZnOnanowires was elucidated using a model with the calculated ZnOsurface stresses as input. We predict for ZnOnanowires due to surface stress effect: (1) when D>20nm, the elastic modulus would be lower than the bulk modulus and decrease with the decreasing diameter, (2) when 20nm>D>2nm, the nanowires with a longer length and a wurtzite crystal structure could be mechanically unstable, and (3) when D<2nm, the elastic modulus would be higher than that of the bulk value and increase with a decrease in nanowire diameter.
Published in Applied Physics Letters, Volume 91, Issue 23, 2007, pages #231912-.
©Applied Physics Letters 2007, American Institute of Physics.
Wang, G., & Li, X. (3 December 2007). Size Dependency of the Elastic Modulus of ZnO Nanowires: Surface Stress Effect. Applied Physics Letters, 91 (23), #231912. http://dx.doi.org/10.1063/1.2821118