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High quality interconnected core/shell ZnO nanorod architectures grown by pulsed laser deposition on ZnO-seeded Si substrates

Inguva, Saikumar, Vijayaraghavan, Rajani K. orcid logoORCID: 0000-0003-1096-448X, McGlynn, Enda orcid logoORCID: 0000-0002-3412-9035 and Mosnier, Jean-Paul orcid logoORCID: 0000-0002-9312-1754 (2017) High quality interconnected core/shell ZnO nanorod architectures grown by pulsed laser deposition on ZnO-seeded Si substrates. Superlattices and Microstructures, 101 . pp. 8-14. ISSN 0749-6036

Abstract
We report the production of vertically aligned and interconnected ZnO core/shell nanorods using pulsed laser deposition (PLD) in a continuous two-step growth process. X-ray diffraction studies showed wurtzite structure and c-axis orientation with a high degree of verticality. Scanning electron microscopy showed a characteristic interconnection morphology between the nanorod tips uniformly present over the entire sample surface area, while transmission electron microscopy revealed crystalline core/amorphous shell architecture. Strong bands at 98.7 cm-1 and 437.2 cm-1 (wurtzite ZnO low and high nonpolar E2 modes) were the main features of the nanorod Raman spectra, again showing the high sample quality. Low-temperature PL data exhibited strong I6 emission and structured green band showing high optical quality. Electrical studies indicated n-type material with ohmic behaviour. The results are discussed in the context of the advantages offered by interconnected architectures of core/shell ZnO nanostructures for various applications.
Metadata
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:ZnO; interconnected nanorods; core/shell nanorods; Si wafer substrates; pulsed laser deposition; 3.331 eV in ZnO photoluminescence
Subjects:Engineering > Materials
Physical Sciences > Spectrum analysis
Physical Sciences > Lasers
Physical Sciences > Nanotechnology
Physical Sciences > Crystallography
Physical Sciences > Semiconductors
DCU Faculties and Centres:Research Initiatives and Centres > National Centre for Plasma Science and Technology (NCPST)
DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:Elsevier
Official URL:http://dx.doi.org/10.1016/j.spmi.2016.11.031
Copyright Information:© 2017 Elservier
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:21486
Deposited On:01 Dec 2016 13:48 by Enda Mcglynn . Last Modified 07 Oct 2021 12:15
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