Observation of epitaxially ordered twinned zinc aluminate “nanoblades” on c-sapphire

  • E. McGlynn
  • B. Twamley
  • K. K. Nanda
  • J. Grabowska
  • R. T. Rajendra Kumar
  • S. B. Newcomb
  • J.-P. Mosnier
  • M. O. Henry


We report the observation of a novel nanostructured growth mode of the ceramic spinel zinc aluminate grown on c-sapphire in the form of epitaxially ordered twinned crystallites with pronounced vertically aligned “nanoblades” on top of these crystallites. The nanostructures are formed on bare c-sapphire substrates using a vapour phase transport method. Electron microscopy images reveal the nanostructure morphology and dimensions and allow direct and indirect observation of the twin boundary location in a number of samples. The nanoblade structure with sharply rising sidewalls gives rise to a distinctive bright contrast in secondary electron images in scanning electron microscopy measurements.


Twin Boundary ZnAl2O4 Zinc Aluminate Epitaxial Relationship High Temperature Electronic 
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We acknowledge financial support from SFI (PI grant # 02/IN1/I95 and equipment funding under Grant No. 03/IN3/1361/EC07), the Irish HEA under the NDP and internal funding from the NCPST, DCU.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • E. McGlynn
    • 1
  • B. Twamley
    • 2
  • K. K. Nanda
    • 1
    • 4
  • J. Grabowska
    • 1
  • R. T. Rajendra Kumar
    • 1
    • 5
  • S. B. Newcomb
    • 3
  • J.-P. Mosnier
    • 1
  • M. O. Henry
    • 1
  1. 1.School of Physical Sciences/National Centre for Plasma Science and TechnologyDublin City UniversityDublinIreland
  2. 2.School of Chemical SciencesDublin City UniversityDublinIreland
  3. 3.Glebe Scientific Ltd., Newport, Co.TipperaryIreland
  4. 4.Materials Research CentreIndian Institute of ScienceBangaloreIndia
  5. 5.Department of PhysicsBharathiar UniversityCoimbatoreIndia

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