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Buckling of ZnO nanowires under uniaxial compression
Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Science and Technology.
Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Science and Technology.
Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology.ORCID iD: 0000-0001-6235-7038
2008 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Applied Physics Letters, Vol. 92, no 10, 103118- p.Article in journal (Refereed) Published
Abstract [en]

Instability and buckling characterization of vertical well aligned single crystal of ZnO nanowires grown on SiC substrate was done quantitatively by nanoindentation technique. The critical load was found to be 477 μN and the corresponding buckling energy was 3.46× 10-11 J. Based on the Euler model for long nanowire and Johnson model which is an extension of the Euler model for intermediate nanowire, the modulus of elasticity of single wire was calculated. Also, the critical buckling stress and strain were determined for the as grown single wire of ZnO. We found how the modulus of elasticity is dependent on the slenderness ratio. © 2008 American Institute of Physics.

Place, publisher, year, edition, pages
2008. Vol. 92, no 10, 103118- p.
Keyword [en]
Nanotechnology, nanomechanics
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-42104DOI: 10.1063/1.2894184Local ID: 60573OAI: diva2:262959
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-01-15
In thesis
1. Elastic Stability and Piezoelectric Power Generation Using ZnO Nanostructures
Open this publication in new window or tab >>Elastic Stability and Piezoelectric Power Generation Using ZnO Nanostructures
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Nanotechnology combines the effort between science and engineering using the approaches of either top-to-bottom or bottom-to-top techniques. A hybrid approach of the above techniques is also used for the fabrication of nanodevices. In nanotechnology one and zero dimensional structures are considered as the basic building blocks for multidimensional systems. One dimensional nanostructure such as nanorods, nanowires and nanotubes has become the research core of science and engineering, because of their unique and interesting properties for device applications.

In this thesis a mechanical property i.e. elastic stability, the behavior of piezoelectric power nanogenerator and the effects of ions irradiations were investigated for ZnO nanostructures.

Buckling phenomena was employed for the elastic stability investigation using Hysitron nanoindentor. ZnO nanostructures were loaded axially to a prescribed controlled load and then unloaded in the same fashion by the tip of a nanoindentor to investigate the first critical load and other unstable configurations. The present buckling study concluded that the elastic stability of ZnO nanostructures were mainly dependent on the slenderness ratio and the verticality of the structures to the substrates.

Piezoelectric power nanogenerators were investigated using ZnO nanowires. The performance of different piezoelectric power nanogenerators were observed on the bases of the aspect ratio, density of state, spatial density and the growth methods. A higher and stable voltage signal was generated by the vapor-liquid-solid (VLS) grown samples compared to the aqueous chemical growth (ACG) grown samples. The finite element (FE) method was also used to calculate the expected output voltage signal from ZnO nanogenerator with different aspect ratio. From the FE results we found that the output voltage of the nanogenerator was decreased above an aspect ratio of 80 for ZnO nanowires.

Ions irradiation effects were investigated using ZnO nanowires grown by the ACG method on Si substrate. Iodine and argon ions of energy 40 MeV and 30 keV were used using fluencies of 3 ×1016 ions/cm2, and 1.3 ×1013 ions/cm2, respectively. The results show that heavy and high energy irradiation modifies the morphology, crystalline structure and optical properties of ZnO nanowires.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2010. 104 p.
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1326
National Category
Natural Sciences
urn:nbn:se:liu:diva-65405 (URN)978-91-7393-361-2 (ISBN)
Public defence
2010-08-27, K3, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:15 (English)
Available from: 2011-02-07 Created: 2011-02-07 Last updated: 2014-01-15Bibliographically approved

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Muhammad, RiazNour, OmerWillander, Magnus
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