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Growth of isotopically enriched ZnO nanorods of excellent optical quality
Dublin City University, Ireland.
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, The Institute of Technology.
Dublin City University, Ireland.
Dublin City University, Ireland.
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2015 (English)In: Journal of Crystal Growth, ISSN 0022-0248, E-ISSN 1873-5002, Vol. 429Article in journal (Refereed) Published
Abstract [en]

We have produced isotopically enriched ZnO nanorods using Zn-enriched ZnO source powder by vapour phase transport on silicon substrates buffer coated with unenriched ZnO seed layers. SEM and XRD data confirm successful growth of high quality, dense, c-axis aligned nanorods over a substantial surface area. Raman. data show a shift of greater than 1 cm(-1) in the peak position of the Raman scattered peaks due to the E-2(low) and E-2(high) phonon modes when the Zn isotope is changed from Zn-64 to Zn-68, consistent with previous work, thus confirming successful isotopic enrichment. SIMS data provides additional confirmation of enrichmenr. The optical qualiry (as dererrninecl by phoLoluminescence feature inrensiLy and line width) is excellenr. Samples with Zn isoLopic enrichmenr ranging from (ZnO)-Zn-64 to (ZnO)-Zn-68 display a shift in recombinarion energy of the bound excirons al. the band edge (3.34-3.37 eV) of similar to 0.6 meV. This blue-shift is also consisren d. with previously published data, further confirming both the excellen d. oprical qualiry and successful isoLopic subsfiLurion of ZnO nanorods using this relarively simple growth method. (c) 2015 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2015. Vol. 429
Keyword [en]
Characterisation; Nanostructures; Growth from vapour; Zinc compounds; Semiconducting II-VI materials
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-122097DOI: 10.1016/j.jcrysgro.2015.07.003ISI: 000361651500002OAI: oai:DiVA.org:liu-122097DiVA: diva2:861911
Note

Funding Agencies|Irish Research Council (IRC) under the EMBARK initiative

Available from: 2015-10-19 Created: 2015-10-19 Last updated: 2015-10-19

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Cullen, JosephBuyanova, IrinaChen, Weimin
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Functional Electronic MaterialsThe Institute of TechnologyFaculty of Science & EngineeringDepartment of Physics, Chemistry and Biology
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