Time-dependent nanoscale plasticity of ZnO nanorods

Yong Jae Kim, Won Woo Lee, In Chul Choi, Byung Gil Yoo, Seung Min Han, Hong Kyu Park, Won Il Park, Jae Il Jang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

External stresses are applied during operation or storage in flexible electronics, which makes understanding time-dependent plastic deformation of nanobuilding blocks more crucial for ensuring the reliability of the devices. Here, we systematically explored the time-dependent nanoscale plasticity of single-crystal ZnO nanorods and its size effects. A series of compression creep tests under different low stresses (in elastic regime) were performed on vertically oriented rods having equivalent diameters in the range of ∼200 to ∼2000 nm. It was revealed that creep indeed occurs in the rods even at ambient temperature, and is more pronounced in smaller nanorods. Analyzing the stress exponent and the activation volume suggests that the enhanced plasticity may be controlled by the diffusion creep (through the "space-charge layer" near the surface and/or along the interface between the punch and the top surface of the rod), which is supported by the results from in situ creep tests under electron-beam irradiation and in situ electric measurements.

Original languageEnglish
Pages (from-to)7180-7188
Number of pages9
JournalActa Materialia
Volume61
Issue number19
DOIs
Publication statusPublished - 2013 Nov 1

Fingerprint

Nanorods
Plasticity
Creep
Electric variables measurement
Flexible electronics
Electric space charge
Electron beams
Plastic deformation
Chemical activation
Irradiation
Single crystals
Temperature

Keywords

  • Diffusion creep
  • In situ
  • SEM test
  • Time-dependent plasticity
  • ZnO nanorods

ASJC Scopus subject areas

  • Ceramics and Composites
  • Metals and Alloys
  • Polymers and Plastics
  • Electronic, Optical and Magnetic Materials

Cite this

Kim, Y. J., Lee, W. W., Choi, I. C., Yoo, B. G., Han, S. M., Park, H. K., ... Jang, J. I. (2013). Time-dependent nanoscale plasticity of ZnO nanorods. Acta Materialia, 61(19), 7180-7188. https://doi.org/10.1016/j.actamat.2013.08.022

Time-dependent nanoscale plasticity of ZnO nanorods. / Kim, Yong Jae; Lee, Won Woo; Choi, In Chul; Yoo, Byung Gil; Han, Seung Min; Park, Hong Kyu; Park, Won Il; Jang, Jae Il.

In: Acta Materialia, Vol. 61, No. 19, 01.11.2013, p. 7180-7188.

Research output: Contribution to journalArticle

Kim, YJ, Lee, WW, Choi, IC, Yoo, BG, Han, SM, Park, HK, Park, WI & Jang, JI 2013, 'Time-dependent nanoscale plasticity of ZnO nanorods', Acta Materialia, vol. 61, no. 19, pp. 7180-7188. https://doi.org/10.1016/j.actamat.2013.08.022
Kim YJ, Lee WW, Choi IC, Yoo BG, Han SM, Park HK et al. Time-dependent nanoscale plasticity of ZnO nanorods. Acta Materialia. 2013 Nov 1;61(19):7180-7188. https://doi.org/10.1016/j.actamat.2013.08.022
Kim, Yong Jae ; Lee, Won Woo ; Choi, In Chul ; Yoo, Byung Gil ; Han, Seung Min ; Park, Hong Kyu ; Park, Won Il ; Jang, Jae Il. / Time-dependent nanoscale plasticity of ZnO nanorods. In: Acta Materialia. 2013 ; Vol. 61, No. 19. pp. 7180-7188.
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