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Mechanics of quasi-1D ZnO nanostructures for energy harvesting

Published online by Cambridge University Press:  18 June 2013

Antonio Rinaldi ,
Rodolfo Araneo ,
Marialilia Pea  and
Andrea Notargiacomo
Antonio Rinaldi
Affiliation:
University of L'Aquila, International Research Center for Mathematics & Mechanics of Complex System (MEMOCS), Via S. Pasquale, 04012, Cisterna di Latina (LT), Italy ENEA ,C.R. Casaccia, Via Anguillarese 301, Santa Maria di Galeria, 00123, Rome, Italy
Rodolfo Araneo
Affiliation:
Sapienza University of Rome, Via Eudossiana 18, 00184, Rome, Italy
Marialilia Pea
Affiliation:
Institute of Photonics and Nanotechnology – CNR, Via Cineto Romano 42, 00156, Rome, Italy
Andrea Notargiacomo
Affiliation:
Institute of Photonics and Nanotechnology – CNR, Via Cineto Romano 42, 00156, Rome, Italy
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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.

Keywords

nanoscalepiezoresponsestress/strain relationship
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1556: Symposium W – Piezoelectric Nanogenerators and Piezotronics , 2013 , mrss13-1556-w09-01
Copyright
Copyright © Materials Research Society 2013 

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References

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