The mechanical properties of ZnO nanowires are the “enabling factor” for piezotronic nanogenerators. Examining the size effects entail the determination of both elastic (i.e. the Young’s Modulus, E) and failure strength (e.g. fracture, fatigue, buckling, etc.) properties of ZnO nanostructures for nanogenerators. An investigation directed to both types of effects is presented here for the first time. On one hand the strength size effects are pointed out and discussed in the framework of a generalized Weibull framework that is set forward for ZnO NWs. On the other hand, the implications of the size effects on elasticity properties are discussed and quantified using numerical simulations. The results demonstrate that the stiffening of smaller NWs can adversely affect the performance in a non-negligible manner, suggesting that both mechanical size-effects have to be considered for design purposes.

Mechanics of quasi-1D ZnO nanostructures for energy harversting / A., Rinaldi; Araneo, Rodolfo; C., Falconi; M., Pea; A., Notargiacomo. - STAMPA. - 1556:(2013), pp. 1-10. (Intervento presentato al convegno MRS Spring Meeting 2013 tenutosi a San Francisco nel April 1-5, 2013) [10.1557/opl.2013.781].

Mechanics of quasi-1D ZnO nanostructures for energy harversting

ARANEO, Rodolfo;
2013

Abstract

The mechanical properties of ZnO nanowires are the “enabling factor” for piezotronic nanogenerators. Examining the size effects entail the determination of both elastic (i.e. the Young’s Modulus, E) and failure strength (e.g. fracture, fatigue, buckling, etc.) properties of ZnO nanostructures for nanogenerators. An investigation directed to both types of effects is presented here for the first time. On one hand the strength size effects are pointed out and discussed in the framework of a generalized Weibull framework that is set forward for ZnO NWs. On the other hand, the implications of the size effects on elasticity properties are discussed and quantified using numerical simulations. The results demonstrate that the stiffening of smaller NWs can adversely affect the performance in a non-negligible manner, suggesting that both mechanical size-effects have to be considered for design purposes.
2013
MRS Spring Meeting 2013
ZnO; nanowire; nanostructures
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Mechanics of quasi-1D ZnO nanostructures for energy harversting / A., Rinaldi; Araneo, Rodolfo; C., Falconi; M., Pea; A., Notargiacomo. - STAMPA. - 1556:(2013), pp. 1-10. (Intervento presentato al convegno MRS Spring Meeting 2013 tenutosi a San Francisco nel April 1-5, 2013) [10.1557/opl.2013.781].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/530124
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