Fabrication and optical characteristics of position-controlled ZnO nanotubes and ZnO/Zn0.8Mg0.2O coaxial nanotube quantum structure arrays

Jinkyoung Yoo, Young Joon Hong, Hye Seong Jung, Yong Jin Kim, Chul Ho Lee, Jeonghui Cho, Yong Joo Doh, Le Si Dang, Kyung Ho Park, Gyu Chul Yi

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27 Citations (Scopus)

Abstract

The position-controlled growth and structural and optical characteristics o ZnO nanotubes and their coaxial heterostructures are reported. To control both the shape and position of ZnO nanotubes, hole-patterned SiO2 growthmask layers on Si(111) substrates with GaN/AlN intermediate layers using conventional lithography are prepared. ZnO nanotubes are grown only on the hole patterns at 600°C by catalyst-free metal-organic vapor-phase epitaxy. Furthermore, the position-controlled nanotube growth method allows the fabrication of artificial arrays of ZnO-based coaxial nanotube single-quantumwell structures (SQWs) on Si substrates. In situ heteroepitaxial growth of ZnO and Zn0.8Mg0.2O layers along the circumference of the ZnO nanotube enable an artificial formation of quantum-well arrays in a designed fashion. The structural and optical characteristics of the ZnO nanotubes and SQW arrays are also investigated using synchrotron radiation X-ray diffractometry and photoluminescence and cathodoluminescence spectroscopy.

Original languageEnglish
Pages (from-to)1601-1608
Number of pages8
JournalAdvanced Functional Materials
Volume19
Issue number10
DOIs
Publication statusPublished - 2009 May 22
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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