Ordered Nanostructures for Energy and Sensing Applications

The micrograph shows ordered one-dimensional (1D) gold nanostructures on a substrate.

Arrays of ordered 1D nanostructures are characterized by peculiar optical properties and possess huge surface areas that make them suitable for various applications spanning

  • biosensing to
  • catalysis,
  • energy harvesting and
  • energy storage.

At the IMST we process thin films of ordered 1D-nanostructure arrays and nanocomposites, thereof using thin film templates in the thickness range from few hundred nanometers to few micrometers. The templates consist of anodized aluminum oxide films on a substrate that can be silicon, ceramic, glass or even a solid polymer. The pore density and pore size is tailored via using different anodizing electrolytes or anodizing conditions. We generally use electrodeposition of the nanostructure (either monolithic or composite) into the porous template. The template can subsequently be dissolved to expose the nanostructure, e.g. for energy harvesting and storage applications - or may be kept, e.g. for sensing applications.