Buffer-layer-assisted epitaxial growth of perfectly aligned oxide nanorod arrays in solution

Gong Ping Li, Lin Jiang, Shi Jie Wang, Xiao Wei Sun, Xiaodong Chen, Tao Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Epitaxy between materials with good lattice match requires perfect staking on the atomic scale and is thus often considered to be challenging to achieve by low-temperature solution-based hydrothermal growth. Inspired by the concept of the buffer layer in vapor-phase epitaxial growth, we present herein a novel synthetic protocol of employing ZnAl2O4 epilayers to hydrothermally grow perfectly aligned ZnO nanorod arrays in solution. Remarkable tunability of the density and dimensions of the nanorods can be realized by adjusting the roughness of the ZnAl2O4 layer and the nutrient solution concentration, which is in line with the classical nucleation theory and also confirms that the nanorod growth is mass-transport-limited. Furthermore, through nanopatterning of the ZnAl2O4 layer by electron beam lithography, shape-controlled vertical ZnO nanostructures at predesigned positions can be achieved. Finally, taking advantage of the epitaxial relationships, we adjusted the tilting orientations of the aligned nanorods by selecting sapphire substrates with different surface planes.

Original languageEnglish (US)
Pages (from-to)4885-4891
Number of pages7
JournalCrystal Growth and Design
Volume11
Issue number11
DOIs
StatePublished - Nov 2 2011

ASJC Scopus subject areas

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

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