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Keywords:

  • Arrays;
  • Nanostructures;
  • Photonic crystals;
  • Solution processing;
  • Zinc oxide, nanocrystalline
Thumbnail image of graphical abstract

ZnO nanopillar arrays with high aspect ratios, such as the one shown in the figure, are fabricated from aqueous solutions at low temperatures using a polymer mold. The shape and dimensions of the nanopillars can be tuned by appropriately patterning the polymer mold. A hexagonal ZnO nanopillar array shows photonic bandgaps at visible wavelengths, as predicted by photonic band structure calculations.