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Formation of β-Ga2O3–TiO2 ‘Nanobarcodes’ from Core–Shell Nanowires


  • Financial support from the National Science Council in Taiwan under Contract No. NSC 92-2214-E006-005 is gratefully acknowledged.


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Well-aligned core–shell Ga2O3/TiO2 nanowires of high quality are synthesized using a two-stage metal-organic chemical vapor deposition technique. Annealing of the nanowires at high temperatures results in either the formation of Ga2O3–TiO2 ‘nanobarcodes’ (in which the wires have alternating segments of Ga2O3 and TiO2) or Ga2O3 nanowires inlaid with TiO2 nanocrystals, depending on the annealing temperature.

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